Faculty Profiles - OKU Takeo

Papers - OKU Takeo

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Crystal structures of perovskite halide compounds used for solar cells Reviewed International journal

T. Oku

Reviews on Advanced Materials Science 59 264 - 305 2020.7

Effects of light irradiation on the photovoltaic performance and crystal lattices of organic–inorganic perovskites in solar cells

H. Shimada, T. Oku, I. Ono, A. Suzuki, H. Iwakuni, T. Yamamoto, and K. Harada

Next Energy 8 100263 2025.7

Fabrication and characterization of CH3NH3PbI3 perovskite photovoltaic devices with decaphenylcyclopentasilane hole transport layers

K. Kuroyanagi, T. Oku, I. Ono, H. Shimada, A. Suzuki, T. Tachikawa, and S. Fukunishi

Coatings 15 253-1 - 253-8 2025.2

Fabrication and characterization of perovskite solar cells using metal phthalocyanines and naphthalocyanines Reviewed

A. Suzuki, N. Ohashi, T. Oku, T. Tachikawa, T. Hasegawa, and S. Fukunishi

Engineering Proceedings 87 6-1 - 6-8 2025.2

Effects of potassium- or germanium-addition to methylammonium-formamidinium-based perovskite photovoltaic devices Reviewed

R. Sobajima, T. Oku, R. Okumura, I. Ono, A. Suzuki, T. Tachikawa, T. Hasegawa, S. Fukunishi

Chemical Physics Letters 865 141937-1 - 141937-7 2025.2

First-principles calculation on electronic structures, phonon dispersions, electronic and thermal conductivity and molecular dynamics of CsYbCl3 perovskite crystal Reviewed

A. Suzuki, T. Oku

Computational Condensed Matter 42 e01008-1 - e01008-13 2025.1

Promoted formation of photoactive α-formamidinium cesium lead triiodide perovskite crystals by germanium addition Reviewed

A. Enomoto, A. Suzuki, T. Oku, and H. Shimada

Inorganics 13 15-1 - 15-11 2025.1

Improvement of the photoelectric conversion efficiencies of a half-photocell using electrodeposited poly(2,2’-bithiophene) through the incorporation of meso-tetra(3-thienyl)porphyrin and electrodeposited poly(3,4-ethylenedioxythiophene) Reviewed

K. Kanbe, Y. Kumagawa, S. Hirata, T. Oku, and T. Akiyama

Japanese Journal of Applied Physics 63 121005 2024.12

Formation of orthorhombic CH3NH3PbI3 perovskite co-doped with ytterbium and gadolinium Reviewed

R. Tanaka, A. Suzuki, T. Oku, T. Tachikawa, S. Fukunishi

Chemical Physics Letters 856 141679-1 - 141679-5 2024.10

Stable decaphenylcyclopentasilane hole transport layers for double-stacked perovskite photovoltaic devices fabricated under ambient atmosphere Reviewed

I. Ono, T. Oku, Y. Genko, R. Okumura, T. Nasu, S. Mizuno, T. Tachikawa, T. Hasegawa, S. Fukunishi

Chemistry of Inorganic Materials 4 100066-1 - 100066-8 2024.9

Electronic structures, thermal properties and molecular dynamics of CsGdCl3 and CsNdCl3 perovskite crystals by first-principles calculations Reviewed

A. Suzuki and T. Oku

Journal of Physics and Chemistry of Solids 194 112243-1 - 112243-13 2024.8

Accelerated formation of photoactive formamidinium-based lead triiodide perovskite crystals by the addition of copper iodide Reviewed

R. Okumura, T. Oku, A. Suzuki

Chemistry of Inorganic Materials 3 100052-1 - 100052-10 2024.8

Effects of halogens and alkali metals on guanidinium-ethylammonium hybrid-doped perovskite photovoltaic devices Reviewed

H. Shimada, T. Oku, I. Ono, R. Okumura, K. Kuroyanagi, A. Suzuki, T. Tachikawa, T. Hasegawa, S. Fukunishi

Hybrid Advances 6 100252-1 - 100252-8 2024.7

Effects of metal phthalocyanine and naphthalocyanine on perovskite solar cells Reviewed

A. Suzuki, N. Ohashi, T. Oku, T. Tachikawa, T. Hasegawa, and Sakiko Fukunishi

Journal of Electronic Materials 53 6049 - 6063 2024.7

Fabrication and photocurrent generation properties of C60-ethylenediamine adduct microparticles film modified with poly(3-hexylthiophene-2,5-diyl) Reviewed

M. Tanaka, K. Kanbe, S. Banya, T. Oku, T. Akiyama

Molecular Crystals and Liquid Crystals 541 - 551 2024.5

Effects of neodymium or ytterbium addition to CH3NH3PbI3 perovskite solar cells inserted with decaphenylcyclopentasilane Reviewed

K. Yamamoto, A. Suzuki, R. Okumura, A. Enomoto, I. Ono, T. Oku, S. Fukunishi, T. Tachikawa, T. Hasegawa

Results in Surfaces and Interfaces 15 100224-1 - 100224-8 2024.5

ペロブスカイト結晶薄膜と安定性 Invited

Journal of Japan Solar Energy Society（日本太陽エネルギー学会学会誌：太陽エネルギー） 50 ( 2 ) 18 - 23 2024.3

Electronic structures of lead-free Sn- or Ge-hybrid perovskite halides studied by first-principles calculation Reviewed

Y.-C. Kuo, T. Oku, A. Suzuki, I. Ono, R. Okumura

Hybrid Advances 5 100174-1 - 100174-10 2024.3

Electronic structures of ABX3 perovskite crystals with a monovalent copper ion as the A-site cation Reviewed

R. Okumura, T. Oku, A. Suzuki

Chemical Physics Impact 8 (2024) . 8 100534-1 - 100534-8 2024.2

Effects of guanidinium iodide surface treatment on CH3NH3PbI3 perovskite solar cells with added decaphenylcyclopentasilane Reviewed

K. Kuroyanagi, T. Oku, I. Ono, R. Okumura, A. Enomoto, A. Suzuki, S. Fukunishi, T. Tachikawa, T. Hasegawa

Nano Trends 5 5 100030-1 - 100030-11 2024.2

Effects of ethylammonium and rubidium addition to guanidinium-based CH3NH3PbI3 perovskite photovoltaic devices prepared at 190 °C in ambient air Reviewed

Materials Today Communications 38 107623-1 - 107623-11 2023.11

Effects of alkali metals or Cu+ addition to α-FAPbI3 perovskite crystals on electronic structures and photovoltaic properties Reviewed

R. Okumura, T. Oku, A. Suzuki

Japanese Journal of Applied Physics 63 (2024) 02SP21-1-8. 63 02SP21-1-1 - 02SP21-11-8 2023.11

Effects of copper substitution in methylammonium-based perovskite solar cells Reviewed

R. Okumura, T. Oku, A. Suzuki, S. Fukunishi, T Tachikawa, and T. Hasegawa

Engineering Proceedings 56 46-1 - 46-6 2023.10

First-Principle calculation analysis on electronic structures and molecular dynamics of gadolinium-doped FAPbI3 Reviewed

A. Suzuki and T. Oku

Engineering Proceedings 56 33-1 - 33-6 2023.10

Fabrication and photoelectric conversion of densely packed C60–ethylenediamine adduct microparticle films-modified electrode covered with electrochemically deposited polythiophene thin-films Reviewed

S. Banya, Y. Kumagawa, D. Izumoto, M. Tanaka, K. Kanbe, T. Oku, and T. Akiyama

RSC Advances 13 31244 - 31251 2023.10

Electronic structures and photovoltaic properties of copper- or tin-doped cesium-based perovskite crystals Reviewed

A. Enomoto, A. Suzuki, T. Oku, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Open Ceramics 16 100476-1 - 100476-7 2023.9

Electronic structures and properties of lead-free cesium- or rubidium-based perovskite halide compounds by first-principles calculations Reviewed

R. Okumura, T. Oku, A. Suzuki

Nano Trends 4 100020-1 - 100020-10 2023.9

Photocurrent generation properties of half-photocell consisting of electropolymerized hierarchical polythiophene thin films as photoexciting electron donor and C60 as electron acceptor Reviewed

K. Kanbe, T. Akiyama, and T. Oku

ECS Advances 2 020505-1 - 020505-6 2023.6

Effects of co-addition of guanidinium and cesium to CH3NH3PbI3 perovskite solar cells Reviewed

T. Oku, S. Uchiya, R. Okumura, A. Suzuki, I. Ono, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Inorganics 11 273-1 - 273-12 2023.6

First-principles calculation analysis and photovoltaic properties of Cu compound added perovskite solar cells Reviewed

R. Okumura, T. Oku, A. Suzuki, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Japanese Journal of Applied Physics 62 SK1029-1 - SK1029-8 2023.5

First-principles calculations and device characterizations of formamidiniumcesium lead triiodide perovskite crystals stabilized by germanium or copper Reviewed

A. Enomoto, A. Suzuki, T. Oku, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Japanese Journal of Applied Physics 62 SK1015-1 - SK1015-7 2023.4

Electronic structures and molecular dynamics of gadolinium-doped FAPbI3 perovskite crystals Reviewed

A. Suzuki and T. Oku

Japanese Journal of Applied Physics 62 SK1006-1 - SK1006-5 2023.3

Metallophtalocyanine used interface engineering for improving long-term stability of methylammonium lead triiodide perovskite Reviewed

C. Ogawa, A. Suzuki, T. Oku, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Physica Status Solidi A 220 2300038-1 - 2300038-10 2023.3

Additive effects of CuPcX4-TCNQ on CH3NH3PbI3 perovskite solar cells Reviewed International journal

A. Suzuki, R. Hasegawa, K. Funayama, T. Oku, M. Okita, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Journal of Materials Science: Materials in Electronics 34 588-1 - 588-20 2023.2

Effects of the addition of copper chloride and potassium iodide to methylammonium-based perovskite solar cells Reviewed International journal

A. Enomoto, A. Suzuki, T. Oku, M. Okita, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Engineering Proceedings (2023) . 31 31-1 - 31-5 2022.12

Effects of cesium/formamidinium co-addition to perovskite solar cells Reviewed International journal

R. Nonomura, T. Oku, I. Ono, A. Suzuki, M. Okita, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Engineering Proceedings 31 32-1 - 32-7 2022.12

Effects of guanidinium and cesium addition to CH3NH3PbI3 perovskite photovoltaic devices Reviewed International journal

T. Oku, I. Ono, S. Uchiya, A. Suzuki, M. Okita, S. Fukunishi, T. Tachikawa and T. Hasegawa

Engineering Proceedings (2023) . 31 35-1 - 35-5 2022.12

Electronic structures and photovoltaic properties of copper-, sodium- and ethylammonium-added CH3NH3PbI3 perovskite compound Reviewed International journal

R. Okumura, T. Oku, A. Suzuki, M. Okita, S. Fukunishi, T. Tachikawa and T. Hasegawa

Engineering Proceedings 31 29-1 - 29-6 2022.12

Fabrication and characterization of SnCl2- and CuBr-added perovskite photovoltaic devices Reviewed International journal

Y. Asakawa, T. Oku, M. Kido, A. Suzuki, R. Okumura, M. Okita, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Technologies (2022) . 10 112-1 - 112-12 2022.10

Ethylammonium bromide- and potassium-added CH3NH3PbI3 perovskite solar cells Reviewed International journal

S. Terada, T.Oku, A. Suzuki, M. Okita, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Photonics (2022) . 9 791-1 - 791-12 2022.10

Additive effect of lanthanide compounds into perovskite layer on photovoltaic properties and electronic structures Reviewed International journal

A. Suzuki, K. Kishimoto, T. Oku, M. Okita, S. Fukunishi, T. Tachikawa

Synthetic Metals (2022) . 287 117092-1 - 117092-11 2022.7

Electrochemical fabrication of hierarchical thin films consisting of different polythiophenes and change in photoelectric conversion properties with film thickness Reviewed

K. Kanbe, T. Akiyama, Y. Kumagawa, S. Hirata, T. Tsujiai, and T. Oku

Japanese Journal of Applied Physics 61 061008-1 - 061008-5 2022.5

Dye fluorescence enhancement by plasmonic nanostructured gold–titania film composites obtained by the combination of electrodeposition and surface sol-gel process Reviewed International journal

T. Akiyama, K. Aiba, T. Otsuki, N. Koyama, T. Oku, K. Sugawa, S. Yamada

Journal of Sol-Gel Science and Technology 104 666 - 672 2022.5

Effects of Cu, K and guanidinium addition to CH3NH3PbI3 perovskite solar cells Reviewed International journal

A. Enomoto, A. Suzuki, T. Oku, M. Okita, S. Fukunishi, T. Tachikawa, and T. Hasegawa

Journal of Electronic Materials 51 4317 - 4328 2022.5

Effects of adding alkali metals and organic cations to Cu-based perovskite solar cells Reviewed International journal

R. Okumura, T. Oku, A. Suzuki, M. Okita, S. Fukunishi, T Tachikawa, and T. Hasegawa

Applied Sciences (2022) 12 1710-1 - 1710-14 2022.2

Fabrication and characterization of CH3NH3PbI3 solar cells with added guanidinium and inserted with decaphenylpentasilane Reviewed

I. Ono, T. Oku, A. Suzuki, Y. Asakawa, S. Terada, M. Okita, S. Fukunishi, and T. Tachikawa

Japanese Journal of Applied Physics (2022) . 61 SB1024-1 - SB1024-10 2022.1

Photovoltaic properties and microstructures of polysilane-added perovskite solar cells Reviewed International journal

S. Mizuno, T. Oku, A. Suzuki, M. Okita, S. Fukunishi, T. Tachikawa and T. Hasegawa

Chemistry Proceedings 9 20-1 - 20-7 2022.1

Additive effects of copper and alkali metal halides into methylammonium lead iodide perovskite solar cells Reviewed International journal

A. Suzuki, K. Kitagawa, T. Oku, M. Okita, S. Fukunishi, and T. Tachikawa

Electronic Materials Letters (2022) 18 176 - 186 2021.11

Additive effects of copper and alkali metal halides into methylammonium lead iodide perovskite solar cells Reviewed International journal

A. Suzuki, K. Kitagawa, T. Oku, M. Okita, S. Fukunishi, and T. Tachikawa

Electronic Materials Letters 18 176 - 186 2021.11

Additive effects of methyl ammonium bromide or formamidinium bromide in methylammonium lead iodide perovskite solar cells using decaphenylcyclopentasilane Reviewed International journal

A. Suzuki, M. Taguchi, T. Oku, M. Okita, S. Minami, S. Fukunishi, and T. Tachikawa

Journal of Materials Science: Materials in Electronics 32 26449 - 26464 2021.9

Additive effects of guanidinium iodide on CH3NH3PbI3 perovskite solar cells Reviewed International journal

T. Kishimoto, T. Oku, A. Suzuki, and N. Ueoka

Physica Status Solidi A 218 2100396-1 - 2100396-10 2021.8

Preparation of silver-nanoparticle-loaded C60-ethylenediamine adduct microparticles and their application to photoelectric conversion Reviewed

K.-i Matsuoka, S. Banya, I. Hosoi, N. Koyama, K. Suzuki, B. Jeyadevan, T. Oku, K. Fujita, S. Yamada, and T. Akiyama

Applied Physics Express 14 (2021) 067003-1-4. 14 067003-1 - 067003-4 2021.6

Effects of polysilane addition to chlorobenzene and high temperature annealing on CH3NH3PbI3 perovskite photovoltaic devices Reviewed International journal

T. Oku, M. Taguchi , A. Suzuki, K. Kitagawa, Y. Asakawa, S. Yoshida , M. Okita , S. Minami, S. Fukunishi, T. Tachikawa

Coatings 11 665-1 - 665-14 2021.5

One-pot synthesis of visible-light-responsive titanium oxide photocatalyst with embedded silver nanoparticles Reviewed International journal

S. Higashida, S. Yoshida, N. Koyama, K. Suzuki, T. Oku, and T. Akiyama

Journal of Sol-Gel Science and Technology 2021.3

Effects of mixed-valence states of Eu-doped FAPbI3 perovskite crystals studied by first-principles calculation Reviewed

A. Suzuki and T. Oku

Materials Advances 2 2021.3

Fabrication and characterization of Ni-, Co-, and Rb-incorporated CH3NH3PbI3 perovskite solar cells Reviewed International journal

A. Suzuki, M. Oe, and T. Oku

Journal of Electronic Materials 50 1980 - 1995 2021.2

Fabrication and surface-enhanced Raman scattering properties of thin-film assemblies of classified silver nanoparticles Reviewed

N. Koyama, T. Akiyama, and T. Oku

Japanese Journal of Applied Physics 60 027002-6 - 027002-6 2021.1

Effects of doping with Na, K, Rb, and formamidinium cations on (CH3NH3)0.99Rb0.01Pb0.99Cu0.01I3-x(Cl, Br)x perovskite photovoltaic cells Reviewed International journal

N. Ueoka, T. Oku, and A. Suzuki

AIP Advances 10 125023-1 - 125023-12 2020.12

Fabrication and characterization of potassium- and formamidinium-added perovskite solar cells Reviewed

S. Kandori, T. Oku, K. Nishi, T. Kishimoto, N. Ueoka and A. Suzuki

Journal of the Ceramic Society of Japan 128 805 - 811 2020.10

Polysilane-inserted methylammonium lead iodide perovskite solar cells doped with formamidinium and potassium Reviewed

T. Oku, S. Kandori, M. Taguchi, A. Suzuki, M. Okita, S. Minami, S. Fukunishi and T. Tachikawa

Energies 13 4776–1 - 4776–11 2020.9

Effects of co-addition of sodium chloride and copper(II) bromide to mixed-cation mixed-halide perovskite photovoltaic devices Reviewed International journal

N. Ueoka and T. Oku

Effects of co-addition of sodium chloride and copper(II) bromide to mixed-cation mixed-halide perovskite photovoltaic devices 3 7272 - 7283 2020.7

Fabrication and surface-enhanced Raman scattering properties of twodimensional gold and silver nanoparticle mixed assemblies by liquid–liquid interfacial precipitation method Reviewed

N. Koyama, S. Banya, T. Akiyama, K. Sugawa, and T. Oku

Applied Physics Express 13 055001-1 - 055001-4 2020.4

Photovoltaic characteristics of CH3NH3PbI3 perovskite solar cells added with ethylammonium bromide and formamidinium iodide Reviewed International journal

K. Nishi, T. Oku, T. Kishimoto, N. Ueoka and A. Suzuki

Coatings 10 410-1 - 410-10 2020.4

Electronic structures, spectroscopic properties, and thermodynamic characterization of sodium or potassium-incorporated CH3NH3PbI3 by first principles calculation Reviewed International journal

A. Suzuki, Y. Miyamoto, and T. Oku

Journal of Materials Science 55 9728 - 9738 2020.3

Fabrication and photocatalytic behavior of titanium oxide–gold nanoparticles composite ultrathin films prepared using surface sol–gel process Reviewed International journal

S. Mitsukawa, T. Akiyama, M, Hinoue, K. Shima, T. Takishita, S. Higashida, N. Koyama, K. Sugawa, M. Ogawa, H. Sakaguchi and T. Oku

Journal of Sol-Gel Science and Technology 93 563 - 569 2020.1

Dependence of electric power flow on solar radiation power in compact photovoltaic system containing SiC-based inverter with spherical Si solar cells Reviewed International journal

Y. Ando, T. Oku, M. Yasuda, K. Ushijima, H. Matsuo, M. Murozono

Heliyon 6 e03094-1 - e03094-10 2020.1

Effects of annealing temperature on decaphenylcyclopentasilane-inserted CH3NH3PbI3 perovskite solar cells Reviewed International journal

M. Taguchi, A. Suzuki, T. Oku, N. Ueoka, S. Minami, and M. Okita

Chemical Physics Letters 737 136822-1 - 136822-7 2019.10

Additive effects of alkali metals on Cu-modified CH3NH3PbI3-δClδ photovoltaic devices Reviewed International journal

N. Ueoka, T. Oku and A. Suzuki

RSC Advances 9 24231 - 24240 2019.8

First-principles calculation study of electronic structures of alkali metals (Li, K, Na and Rb)-incorporated formamidinium lead halide perovskite compounds Reviewed

Suzuki A., Oku T.

Applied Surface Science 483 912 - 921 2019.7

Language：English Publishing type：Research paper (scientific journal) Publisher：Applied Surface Science

© 2019 Electronic structures of alkali metals (Li, Na, K or Rb)-incorporated formamidinium lead halide perovskite compounds were investigated by first-principles calculation. The conduction band were supplied with electrons from energy levels at 2s, 3s, 4s and 5s orbital of alkali metal to energy levels at 6p orbital of Pb atom in the perovskite crystal. Deviation of charge distribution in the perovskite crystal promoted the photo-induced charge generation, electron correlation and electron-lattice interaction as phonon effectiveness. The chemical shifts of 127 I-NMR in the perovskite crystal were originated in a slight perturbation of the coordination structure with nuclear quadruple interaction based on the electric field gradient. The slight incorporation of alkali metal near the ligand structure decreased the enthalpy with the Gibbs free-energy by contribution of the entropy due to the P–I stretching vibration.

DOI： 10.1016/j.apsusc.2019.04.049

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Effects of guanidinium addition to CH3NH3PbI3-xClx perovskite photovoltaic devices Reviewed

T. Kishimoto, A. Suzuki, N. Ueoka and T. Oku

Journal of the Ceramic Society of Japan 127 491 - 497 2019.7

Fabrication and evaluation of K-doped MA0.8FA0.1K0.1PbI3(Cl) perovskite solar cells Reviewed International journal

H. Machiba, T. Oku, T. Kishimoto, N. Ueoka, and A. Suzuki

Chemical Physics Letters 730 117 - 123 2019.5

Fabrication and characterization of perovskite type solar cells using phthalocyanine complexes Reviewed International journal

A. Suzuki, H. Okumura, Y. Yamasaki, and T. Oku

Applied Surface Science 488 586 - 592 2019.5

Electronic structures and magnetic properties of transition metal doped CsPbI3 perovskite compounds by first principle calculation Reviewed International journal

A. Suzuki and T. Oku

Physics of the Solid State 61 1074 - 1085 2019.4

Additive effect of formamidinium chloride in methylammonium lead halide compound-based perovskite solar cells Reviewed International journal

A. Suzuki, M. Kato, N. Ueoka, and T. Oku

Journal of Electronic Materials 2019.3

Effects of TiO2 nanoparticles with different sizes on the performance of CH3NH3PbI3-xClx solar cells Reviewed International journal

N. Ueoka, T. Oku, A. Suzuki, H. Sakamoto, M. Yamada, S. Minami, and M. Okita

AIP Conference Proceedings 2067 020001-1 - 020001-10 2019.1

Effects of poly(methyl methacrylate) addition to perovskite photovoltaic devices Reviewed International journal

M. Taguchi, A. Suzuki, N. Ueoka, and T. Oku

AIP Conference Proceedings 2067 020018-1 - 020018-8 2019.1

Fabrication and photovoltaic properties of an invert-type organic thin-film solar cells incorporation of phosphorescent material into electron transport layer Reviewed International journal

Y. Matsumiya, T. Akiyama, I. Yamada, and T. Oku

AIP Conference Proceedings 2067 020013-1 - 020013-6 2019.1

Fabrication and characterization of perovskite solar cells added with zinc phthalocyanine to active layer Reviewed International journal

A. Suzuki, Y. Hayashi, Y. Yamasaki, and T. Oku

AIP Conference Proceedings 2067 020010-1 - 020010-6 2019.1

Effects of KBr or KCl addition to CH3NH3PbI3(Cl) photovoltaic devices International journal

H. Machiba, T. Oku, and A. Suzuki

AIP Conference Proceedings 2067 020009-1 - 020009-7 2019.1

Effects of decaphenylcyclopentasilane addition on photovoltaic properties of perovskite solar cells Reviewed International journal

M. Taguchi, A. Suzuki, T. Oku, S. Fukunishi, S. Minami, and M. Okita

Coatings 8 461-1 - 461-10 2018.12

Stability characterization of PbI2‑added CH3NH3PbI3−xClx photovoltaic devices Reviewed International journal

N. Ueoka and T. Oku

ACS Applied Materials & Interfaces 10 44443 - 44451 2018.12

Fabrication and characterization of CH3NH3PbI3 perovskite solar cells added with polysilanes Reviewed International journal

T. Oku, J. Nomura, A. Suzuki, H. Tanaka, S. Fukunishi, S. Minami, and S. Tsukada

International Journal of Photoenergy 2018 8654963-1 - 8654963-7 2018.10

Fabrication and Characterization of the copper bromides-added CH3NH3PbI3-xClx perovskite solar cells Reviewed International journal

Tanaka H., Ohishi Y., Oku T.

Synthetic Metals 244 128 - 133 2018.10

Language：English Publishing type：Research paper (scientific journal) Publisher：Synthetic Metals Participation form：Joint(The vice charge)

© 2018 Elsevier B.V. CH3NH3PbI3-xClx-based perovskite photovoltaic devices were fabricated and characterized. The effects of CuBr or CuBr2addition on the photovoltaic properties and microstructures of the perovskite phase were investigated. The conversion efficiencies of the perovskite solar cells added with copper bromides were improved compared with the standard CH3NH3PbI3-xClxdevices. The efficiency of the device with CuBr2added was higher than that with CuBr added.

DOI： 10.1016/j.synthmet.2018.07.008

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Time-dependent non-linear size change of C<inf>60</inf>-ethylenediamine adduct particles in formation process Reviewed

Akiyama T., Ono Y., Miyamura H., Saito J., Kimura K., Higashida S., Oku T.

Journal of Nanoparticle Research 20 ( 9 ) 2018.9

Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Nanoparticle Research

© 2018, Springer Nature B.V. Addition reaction between C60 and ethylenediamine occurred at room temperature in an ambient condition. C60-ethylenediamine adduct particles were prepared by mixing toluene solutions of C60 and ethyelenediamine. Average diameter of the C60-ethylenediamine adduct particles was changed non-linearly according to the reaction time, which were observed using transmission electron microscopy. Early stage of the reaction, the diameter of the adduct particles was changed from about 250 to about 430 nm. Then, the size of the adduct particles was converged to about 300 nm. During this addition reaction, the crystalline sizes of adduct particles were constant about 2–3 nm, regardless of the sizes of the adduct particles, which were determined by X-ray diffraction measurement. [Figure not available: see fulltext.].

DOI： 10.1007/s11051-018-4353-9

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Effects of transition metals incorporated into perovskite crystals on the electronic structures and magnetic properties by first-principles calculation Reviewed

Suzuki A., Oku T.

Heliyon 4 ( 8 ) 2018.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Heliyon

© 2018 The Authors Additive effects of transition metals (M = Cr2+, Co2+, Cu2+and Y3+) on the electronic structures and magnetic properties of formamidinium lead halide perovskite compounds (FAPbI3, where FA = NH2CHNH2+) were investigated by first-principle calculation using density functional theory. In the case of Cr2+, Cu2+and Y3+-incorporated FAPbI3perovskite crystals, the electron density distribution of d-p hybrid orbital on the transition metal and iodine halogen-atoms were delocalized at frontier orbital. The total and partial density of state appeared the 3d-p hybrid orbital near the frontier orbital with narrowing band gap, yielding the wide broad absorption in the near-infrared region. The electronic correlation worked in between the localized spin on 3d orbital of the metal, and the itinerant carriers on the 5p orbital of the iodine halogen ligand and the 6p orbital of the lead atom in the perovskite crystal. The vibration behavior of the Raman and Infrared spectra were associated with change of polarization and slight distortion near the coordination structure. The considerable splitting of chemical shift of127I-NMR and207Pb-NMR in the Co2+and Cu2+-incorporated FAPbI3crystals were caused by crystal field splitting as Jahn-Teller effect with nearest-neighbor nuclear quadrupole interaction based on the charge distribution.

DOI： 10.1016/j.heliyon.2018.e00755

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Effects of transition metals incorporated into perovskite crystals on the electronic structures and magnetic properties by first-principles calculation Reviewed International journal

A. Suzuki and T. Oku

Heliyon 4 e00755-1 - e00755-22 2018.8

Possible applications of nanomaterials for nuclear fusion devices Invited Reviewed International journal

T. Oku

Energy Harvesting and Systems 5 11 - 27 2018.7

Structural stabilities of organic–inorganic perovskite crystals Reviewed

H. Tanaka, T. Oku, and N. Ueoka

Japanese Journal of Applied Physics 57 08RE12-1 - 08RE12-9 2018.7

Effects of Cu addition to perovskite CH3NH3PbI3-xClx photovoltaic devices with hot airflow during spin-coating Reviewed

H. Tanaka, Y. Ohishi, and T. Oku

Japanese Journal of Applied Physics 57 08RE10-1 - 08RE10-5 2018.7

Effects of PbI2 addition and TiO2 electron transport layers for perovskite solar cells Reviewed

N. Ueoka, T. Oku, H. Tanaka, A. Suzuki, H. Sakamoto, M. Yamada, S. Minami, S. Miyauchi, and S. Tsukada

Japanese Journal of Applied Physics 57 08RE05-1 - 08RE05-7 2018.7

Microstructures, optical and photovoltaic properties of CH3NH3PbI3(1−x)Clx perovskite films with CuSCN additive Reviewed International journal

Y. Shirahata and T. Oku

Materials Research Express 5 055504-1 - 055504-10 2018.5

Effects of excess PbI2 addition to CH3NH3PbI3-xClx perovskite solar cells Reviewed

N. Ueoka, T. Oku, Y. Ohishi, H. Tanaka, and A. Suzuki

Chemistry Letters 47 (2018) 528–531 47 528 - 531 2018.4

Highly (100)-oriented CH3NH3PbI3(Cl) perovskite solar cells prepared with NH4Cl using an air blow method Reviewed International journal

T. Oku, Y. Ohishi and N. Ueoka

RSC Advances 8 10389 - 10395 2018.3

Fabrication and characterization of perovskite CH3NH3Pb1-xSbxI3-3xBr3 photovoltaic devices Reviewed International journal

J. Yamanouchi, T. Oku, Y. Ohishi, M. Fukaya, N. Ueoka, H. Tanaka, and A. Suzuki

Advances in Materials Research 7 435 - 446 2018.3

Rietveld refinement of crystal structure of perovskite CH3NH3Pb(Sb)I3 solar cells Reviewed

Y. Ando, T. Oku, and Y. Ohishi

Japanese Journal of Applied Physics 57 02CE02-1 - 02CE02-5 2018.2

First-principles calculation study of electronic structures and magnetic properties of Mn-doped perovskite crystals for solar cell applications Reviewed

A. Suzuki and T. Oku

Japanese Journal of Applied Physics 57 02CE04-1 - 02CE04-7 2018.2

Fabrication and characterization of CH3NH3(Cs)Pb(Sn)I3(Cl) perovskite solar cells with TiO2 nanoparticle layers Reviewed

N. Ueoka, T. Oku, A. Suzuki, H. Sakamoto, M. Yamada, S. Minami, and S. Miyauchi

Japanese Journal of Applied Physics 57 02CE03-1 - 02CE03-7 2018.2

A state-of-the-art compact SiC photovoltaic inverter with maximum power point tracking function Reviewed International journal

Y. Ando, T. Oku, M. Yasuda, K. Ushijima, H. Matsuo, and M. Murozono

AIP Conference Proceedings 1929 020002-1 - 020002-9 2018.1

Effects of CsBr addition on the performance of CH3NH3PbI3-xClx-based solar cells Reviewed International journal

N. Ueoka, T. Oku, Y. Ohishi, H. Tanaka, A. Suzuki, H. Sakamoto, M. Yamada, S. Minami, and S. Tsukada

AIP Conference Proceedings 1929 020026-1 - 020026-8 2018.1

Insertion effect of spin-coated films of C60-ethylenediamine adduct on organic thin-film solar cells

A. Yamada, D. Izumoto, T. Akiyama, K. Fujita, A. Suzuki, and T. Oku

AIP Conference Proceedings 1929 020020-1 - 020020-5 2018.1

Effects of halide addition to arsenic-doped perovskite photovoltaic devices Reviewed International journal

T. Hamatani and T. Oku

AIP Conference Proceedings 1929 020018-1 - 020018-8 2018.1

Fabrication and characterization of rubidium/formamidinium-incorporated methylammonium-lead-halide perovskite solar cells Reviewed International journal

M. Kato, A. Suzuki, Y. Ohishi, H. Tanaka, and T. Oku

AIP Conference Proceedings 1929 020015-1 - 020015-7 2018.1

Fabrication and characterization of perovskite solar cells added with MnCl2, YCl3 or poly(methyl methacrylate) Reviewed International journal

M. Taguchi, A. Suzuki, H. Tanaka, and T. Oku

AIP Conference Proceedings 1929 020012-1 - 020012-8 2018.1

Effects of CuBr addition to CH3NH3PbI3(Cl) perovskite photovoltaic devices Reviewed International journal

T. Oku, Y. Ohishi, and H. Tanaka

AIP Conference Proceedings 1929 020010-1 - 020010-8 2018.1

Effects of GeI2 or ZnI2 addition to perovskite CH3NH3PbI3 photovoltaic devices Reviewed International journal

H. Tanaka, Y. Ohishi, and T. Oku

AIP Conference Proceedings 1929 020007-1 - 020007-7 2018.1

Effects of hot airflow during spin-coating process on CH3NH3PbI3-xClx perovskite solar cells

H. Tanaka, Y. Ohishi, and T. Oku

AIP Conference Proceedings 1929 (2018) . 1929 020005-1 - 020005-7 2018.1

Rietveld refinement of the crystal structure of perovskite solar cells using CH3NH3PbI3 and other compounds Reviewed International journal

Y. Ando, Y. Ohishi, K. Suzuki, A.Suzuki, and T.Oku

AIP Conference Proceedings 1929 020003-1 - 020003-8 2018.1

Effects of annealing on CH3NH3PbI3(Cl) perovskite photovoltaic devices Reviewed

T. Oku and Y. Ohishi

Journal of the Ceramic Society of Japan 126 56 - 60 2018.1

Effects of copper addition on photovoltaic properties of perovskite CH<inf>3</inf>NH<inf>3</inf>PbI<inf>3−x</inf>Cl<inf>x</inf>solar cells Reviewed

Shirahata Y., Oku T.

Physica Status Solidi (A) Applications and Materials Science 214 ( 10 ) 2017.10

Language：English Publishing type：Research paper (scientific journal) Publisher：Physica Status Solidi (A) Applications and Materials Science

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim This paper presents the effects of copper (Cu) addition on the photovoltaic properties of perovskite CH3NH3PbI3−xClxsolar cells. The effects were investigated by measuring the current density–voltage (J–V) characteristics and external quantum efficiency. In the present work, CuBr and CuBr2were used as additives. The photovoltaic properties of the CuBr-added CH3NH3PbI3−xClxdevices showed a clear improvement. Structural and optical properties of the CuBr- and CuBr2-added CH3NH3PbI3−xClxfilms were also investigated. Based on the present results, the changes in the photovoltaic properties were discussed.

DOI： 10.1002/pssa.201700268

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Effects of copper addition on photovoltaic properties of perovskite CH3NH3PbI3-xClx solar cells Reviewed International journal

Y. Shirahata and T. Oku

Physica Status Solidi A 214 1700268-1 - 1700268-6 2017.10

Effect of gold nanoparticles in titanium oxide layer on the photovoltaic performance of inverted-type organic thin-film solar cells Reviewed

Akiyama T., Sakata H., Matsumoto T., Mitsukawa S., Sakaguchi H., Oku T.

Molecular Crystals and Liquid Crystals 653 ( 1 ) 50 - 56 2017.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Molecular Crystals and Liquid Crystals

© 2017 Taylor & Francis Group, LLC. Gold nanoparticle/titanium oxide composite materials were prepared at low temperature and were used as electron-transport layers for inverted-type organic thin-film solar cells. The application of gold nanoparticle/titanium oxide composite materials led to an improvement in the photoelectric conversion efficiency of the solar cells under simulated sunlight irradiation.

DOI： 10.1080/15421406.2017.1348843

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Electronic structures, and optical and magnetic properties of quadruple-decker phthalocyanines Reviewed International journal

A. Suzuki and T. Oku

Magnetochemistry 3 21-1 - 21-13 2017.6

A transportable photovoltaic power generation system utilizing a SiC inverter and spherical Si solar cells Reviewed

Y. Ando, T. Oku, M. Yasuda, K. Ushijima, and M. Murozono

Technologies 5 18-1 - 18-11 2017.4

Effects of NH4Cl addition to perovskite CH3NH3PbI3 photovoltaic devices Reviewed

T. Oku, Y. Ohishi, A. Suzuki and Y. Miyazawa

Journal of the Ceramic Society of Japan 125 303 - 307 2017.4

Effects of metal phthalocyanines as hole-transporting layers of perovskite-based solar cells Reviewed International journal

A. Suzuki, H. Ueda, Y. Okada, Y. Ohishi, Y. Yamasaki, T. Oku

Chemical and Materials Engineering 5 234 - 242 2017.4

Effects of heat treatment on fluorine-doped tin oxide anti-reflection films coated on silicon spheres Reviewed

Y. Shirahata, T. Oku, Y. Kanamori and M. Murozono

Journal of the Ceramic Society of Japan 125 145 - 149 2017.3

Effects of polysilane-doped spiro-OMeTAD hole transport layers on photovoltaic properties

Y. Shirahata, Y. Yamomoto, A. Suzuki, T. Oku, S. Fukunishi, and K. Kohno

Physica Status Solidi A 214 1600591-1 - 1600591-7 2017.3

Effects of polysilane-doped spiro-OMeTAD hole transport layers on photovoltaic properties Reviewed

Shirahata Y., Yamomoto Y., Suzuki A., Oku T., Fukunishi S., Kohno K.

Physica Status Solidi (A) Applications and Materials Science 214 ( 3 ) 2017.3

Language：English Publishing type：Research paper (scientific journal) Publisher：Physica Status Solidi (A) Applications and Materials Science

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Effects of polysilane-doped 2,2′,7,7′-tetrakis-(N,N-di-p-methoxyphenylamino)-9,9′-spirobifluorene (spiro-OMeTAD) hole transport layers on photovoltaic properties were investigated by measuring current density–voltage characteristics and incident photon-to-current conversion efficiency of CH3NH3PbI3-based photovoltaic devices. Three kinds of polysilanes were used as the dopants. Due to the polysilane doping, conversion efficiencies of the CH3NH3PbI3devices using the polysilane-doped hole transport layers were improved. Microstructures of the CH3NH3PbI3devices were also investigated. Based on the results of the microstructure analysis, impact of silicon in the polysilanes doped into spiro-OMeTAD layer on photovoltaic properties were discussed.

DOI： 10.1002/pssa.201600591

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Construction of photovoltaic power generation-storage system using an inverter with SiC FET and SBD

T. Oku, Y. Ando, M. Yasuda, Y. Shirahata, K. Ushijima, M. Murozono

Advances in Energy and Power 5 7 - 12 2017.3

Fabrication of perovskite-type photovoltaic devices with polysilane hole transport layers Reviewed International journal

Y. Shirahata, T. Oku, S. Fukunishi and K. Kohno

Materials Science and Applications 8 209 - 222 2017.2

Effects of PBr3 addition to polysilane thin films on structures and photovoltaic properties Reviewed International journal

J. Nakagawa, T. Oku, A. Suzuki, T. Akiyama, M. Yamada, S. Fukunishi, K. Kohno

Green and Sustainable Chemistry 7 20 - 34 2017.2

Comparison between SiC- and Si-based inverters for photovoltaic power generation systems Reviewed International journal

19. Y. Ando, Y. Shirahata, T. Oku, T. Matsumoto, Y. Ohishi, M. Yasuda, A. Shimono, Y. Takeda, M. Murozono

Journal of Power and Energy Engineering 5 30 - 40 2017.1

Arsenic and chlorine co-doping to CH3NH3PbI3 perovskite solar cells Reviewed International journal

T. Hamatani, Y. Shirahata, Y. Ohishi, M. Fukaya and T. Oku

Advances in Materials Physics and Chemistry 7 1 - 10 2017.1

Fabrication and characterization of PCBM:P3HT-based thin-film organic solar cells with zinc phthalocyanine and 1,8-diiodooctane Reviewed International journal

H. Maruhashi, T. Oku, A. Suzuki, T. Akiyama and Y. Yamasaki

Chemical and Materials Engineering 5 1 - 7 2017.1

A compact SiC photovoltaic inverter with maximum power point tracking function Reviewed

Ando Y., Oku T., Yasuda M., Shirahata Y., Ushijima K., Murozono M.

Solar Energy 141 228 - 235 2017.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Solar Energy

© 2016 Elsevier Ltd A compact 150 W photovoltaic inverter was developed using SiC devices, which integrated a maximum power point tracking charge controller and a direct current (DC) - alternating current (AC) converter into a single module. The DC-AC converter circuit was built with four SiC metal-oxidesemiconductor field-effect transistors, while the DC-DC converter circuit built with four SiC Schottky barrier diodes. An increase of the switching frequency led to the module of a reduced size (250 × 180 × 28 mm3), which is just one third volume of a commercial Si-based inverter available today. Besides being compact, the conversion efficiency of the DC-AC converter was approximately 3% higher than that of the commercial Si-based inverter. In addition, the MPPT controller showed a conversion efficiency exceeding 96%, which raised the total efficiency under practical operation conditions up to 86%.

DOI： 10.1016/j.solener.2016.11.041

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Comparative study of SiC- and Si-based photovoltaic inverters Reviewed International journal

Y. Ando, T. Oku, M. Yasuda, Y. Shirahata, K. Ushijima, and M. Murozono

AIP Conference Proceedings 1807 020020-1 - 020020-1 2017.1

Photovoltaic properties of Cu-doped CH3NH3PbI3 with perovskite structure Reviewed International journal

Y. Shirahata and T. Oku

AIP Conference Proceedings 1807 020008-1 - 020008-6 2017.1

Fabrication and characterization of CH3NH3(Cs)Pb(Sn)I3(Br) perovskite solar cells Reviewed International journal

N. Ueoka, Y. Ohishi, Y. Shirahata, A. Suzuki, and T. Oku

AIP Conference Proceedings 1807 020009-1 - 020009-9 2017.1

Doping effects of transition metal elements to titanium dioxide for perovskite solar cells Reviewed International journal

J. Saito, A. Suzuki, T. Akiyama and T. Oku

AIP Conference Proceedings 1807 020010-1 - 020010-5 2017.1

Effects of halogen doping on the photovoltaic properties of HC(NH2)2PbI3 perovskite solar cells Reviewed International journal

Y. Umemoto, A. Suzuki, and T. Oku

AIP Conference Proceedings 1807 020011-1 - 020011-10 2017.1

Fabrication and characterization of perovskite-based CH3NH3Pb1-xAsxI3+xCly photovoltaic devices Reviewed International journal

T. Hamatani, Y. Shirahata, Y. Ohishi, M. Fukaya, and T. Oku

AIP Conference Proceedings 1807 020012-1 - 020012-9 2017.1

Fabrication and characterization of perovskite photovoltaic devices with TiO2 nanoparticle layers International journal

T. Oku, N. Ueoka, K. Suzuki, A. Suzuki, M. Yamada, H. Sakamoto, S. Minami, S. Fukunishi, K. Kohno, and S. Miyauchi

AIP Conference Proceedings 1807 020014-1 - 020014-7 2017.1

Fabrication and characterization of perovskite based solar cells using phthalocyanine and naphthalocyanine as hole-transporting layer Reviewed International journal

Y. Okada, A. Suzuki, Y. Yamasaki, and T. Oku

AIP Conference Proceedings 1807 020015-1 - 020015-7 2017.1

Fabrication and electrochemical properties of insoluble fullerene-diamine adduct thin-films as buffer layer by alternate immersion process Reviewed International journal

J. Saito, T. Akiyama, A. Suzuki, and T. Oku

AIP Conference Proceedings 1807 020017-1 - 020017-6 2017.1

Microstructures and optical properties of surface and inside of silicon spheres Reviewed International journal

Y. Shirahata, T. Oku, Y. Kanamori, and M. Murozono

AIP Conference Proceedings 1807 020019-1 - 020019-7 2017.1

Effects of SbBr3 addition to CH3NH3PbI3 solar cells Reviewed International journal

T. Oku, Y. Ohishi, and A. Suzuki

AIP Conference Proceedings 1807 020007-1 - 020007-5 2017.1

A compact SiC photovoltaic inverter with maximum power point tracking function Reviewed International journal

Y. Ando, T. Oku, M. Yasuda, Y. Shirahata, K. Ushijima, M. Murozono

Solar Energy 141 228 - 235 2017.1

Characterization and photovoltaic properties of BiFeO3 thin films Reviewed International journal

Y. Shirahata and T. Oku

Coatings 6 68-1 - 68-9 2016.12

Effects of central metal on electronic structure, magnetic properties infrared and Raman spectra of double-decker phthalocyanine Reviewed International journal

A. Suzuki and T. Oku

Applied Surface Science 380 127 - 134 2016.9

Effects of Cl addition to Sb-doped perovskite-type CH3NH3PbI3 photovoltaic devices Reviewed International journal

T. Oku, Y. Ohishi, A. Suzuki and Y. Miyazawa

Metals 6 147-1 - 147-13 2016.6

Fabrication and photocurrent generation properties of insoluble hierarchical polythiophene thin films prepared by sequential electrochemical polymerization Reviewed

13. Y. Kumagawa, T. Akiyama, Y. Nishimura, K. Goto, A. Suzuki, and T. Oku

Bulletin of the Chemical Society of Japan 89 700 - 704 2016.6

Microstructures and optical properties of silicon spheres for solar cells Reviewed

Y. Shirahata, B. Zhang, T. Oku, Y. Kanamori and M. Murozono

Materials Transactions 57 1082 - 1087 2016.6

Fabrication and characterization of CH3NH3PbI3-x-yBrxCly perovskite solar cells Reviewed International journal

A. Suzuki, H. Okada and T. Oku

Energies 9 376-1 - 376-11 2016.5

Fabrication and characterization of bismuth ferrite as an electron transport layer in perovskite photovoltaic devices Reviewed

Y. Shirahata, A. Suzuki and T. Oku

Journal of the Ceramic Society of Japan 124 602 - 605 2016.5

Low-temperature synthesis of titanium oxide/gold nanoparticle　composite powders using a combination of the sol–gel process and ultraviolet light irradiation Reviewed International journal

T. Matsumoto, T. Akiyama, S. Banya, D. Izumoto, H. Sakaguchi and T. Oku

Journal of Sol-Gel Science and Technology 78 692 - 697 2016.3

Effects of chlorine addition to perovskite-type CH3NH3PbI3 photovoltaic devices Reviewed

T. Oku, K. Suzuki and A. Suzuki

Journal of the Ceramic Society of Japan 124 234 - 238 2016.3

Effects of antimony addition to perovskite-type CH3NH3PbI3 photovoltaic devices Reviewed

T. Oku, Y. Ohishi and A. Suzuki

Chemistry Letters 45 134 - 136 2016.2

Low temperature fabrication of perovskite solar cells with TiO2 nanoparticle layers Reviewed International journal

M. Kanayama, T. Oku, A. Suzuki, M. Yamada, H. Sakamoto, S. Minami and K. Kohno

AIP Conference Proceedings 1709 020019-1 - 020019-7 2016.2

Fabrication and photovoltaic properties of ZnO nanorods/perovskite solar cells Reviewed

Y. Shirahata, K. Tanaike, T. Akiyama, K. Fujimoto, A. Suzuki, B. Jeyadevan, and T. Oku

AIP Conference Proceedings 1709 020018-1 - 020018-9 2016.2

Fabrication and characterization of perovskite-based CH3NH3Pb1-xGexI3, CH3NH3Pb1-xTlxI3 and CH3NH3Pb1-xInxI3 photovoltaic devices Reviewed International journal

Y. Ohishi, T. Oku, and A. Suzuki

AIP Conference Proceedings 1709 020020-1 - 020020-8 2016.2

Theoretical study of NMR, infrared and Raman spectra on triple-decker phthalocyanines International journal

A. Suzuki and T. Oku

AIP Conference Proceedings 1709 020013-1 - 020013-8 2016.2

Microstructure analysis of spherical silicon solar cells with SnOx:Fy layers Reviewed International journal

Y. Shirahata, T. Oku, Y. Kanamori, and M. Murozono

AIP Conference Proceedings 1709 020021-1 - 020021-8 2016.2

Construction and evaluation of photovoltaic power generation and power storage system using SiC field-effect transistor inverter Reviewed International journal

T. Oku, T. Matsumoto, K. Hiramatsu, M. Yasuda, Y. Ohishi, A. Shimono, Y. Takeda, and M. Murozono

AIP Conference Proceedings 1709 020024-1 - 020024-10 2016.2

Evaluation of photovoltaic power generation system using spherical silicon solar cells and SiC-FET inverter Reviewed International journal

T. Matsumoto, T. Oku, K. Hiramatsu, M. Yasuda, Y. Shirahata, A. Shimono, Y. Takeda, and M. Murozono

AIP Conference Proceedings 1709 020023-1 - 020023-6 2016.2

Fabrication and characterization of perovskite-type solar cells with Nb-doped TiO2 layers Reviewed International journal

J. Saito, T. Oku, A. Suzuki, and T. Akiyama

AIP Conference Proceedings 1709 020027-1 - 020027-7 2016.2

Role of bromine doping on the photovoltaic properties and microstructures of CH3NH3PbI3 perovskite solar cells Reviewed International journal

A. Suzuki, H. Okada and T. Oku

AIP Conference Proceedings 1709 020022-1 - 020022-8 2016.2

Electronic structures and magnetic/optical properties of metal phthalocyanine complexes Reviewed International journal

S. Baba, A. Suzuki and T. Oku

AIP Conference Proceedings 1709 020012-1 - 020012-8 2016.2

Effect of gold and silver nanoparticle in poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) layer on inverted-type organic thin-film solar cells Reviewed

Y. Yagi, T. Akiyama, T. Matsumoto, H. Sakaguchi, and T. Oku

Transactions of the Materials Research Society of Japan 40 331 - 334 2015.12

Effects of hole-transporting layers of perovskite-based solar cells Reviewed

A. Suzuki, T. Kida, T. Takagi and T. Oku

Japanese Journal of Applied Physics 55 02BF01-1 - 02BF01-5 2015.11

Hydrogen storage and possible condensation of deuterium in palladium Reviewed International journal

T. Oku and T. Kitao

Nanoscience & Nanotechnology-Asia 5 137 - 143 2015.11

Fabrication and characterization of a perovskite-type solar cell with a substrate size of 70 mm Reviewed International journal

T. Oku, T. Matsumoto, A. Suzuki and K. Suzuki

Coatings 5 646 - 655 2015.10

Effects of niobium addition into TiO2 layers on CH3NH3PbI3-based photovoltaic devices Reviewed

T. Oku, T. Iwata, and A. Suzuki

Chemistry Letters 44 1033 - 1035 2015.7

Low-temperature synthesis of titanium oxide/gold nanoparticle　composite powders using a combination of the sol–gel process and ultraviolet light irradiation Reviewed International journal

T. Matsumoto, T. Akiyama, S. Banya, D. Izumoto, H. Sakaguchi and T Oku

Journal of Sol-Gel Science and Technology 78 692 - 697 2015.6

Formation of thin films of densely packed [60]fullerenediaminoethane adduct microparticles at a liquid/liquid interface and their photoelectrochemical applications Reviewed

S. Banya, T. Akiyama, D. Izumoto, A. Suzuki and T. Oku

Chemistry Letters 44 489 - 491 2015.4

Fabrication and characterization of silicon naphthalocyanine/fullerene-based photovoltaic devices with inverted structures Reviewed

H. Maruhashi, T. Oku, A. Suzuki, and T. Akiyama

JJAP Conference Proceedings 3 011405-1 - 011405-7 2015.3

Effects of triphenylborane addition to decaphenylcyclopentasilane thin films Reviewed

T. Oku, N. Hibi, A. Suzuki, T. Akiyama, M. Yamada, S. Fukunishi, and K. Kohno

JJAP Conference Proceedings 3 011404-1 - 011404-6 2015.3

Fabrication and characterization of P3HT:PCBM-based thin film organic solar cells with zinc phthalocyanine Reviewed

H. Maruhashi, T. Oku, A. Suzuki, T. Akiyama, and Y. Yamasaki

AIP Conference Proceedings 1649 102 - 106 2015.2

Microstructures and properties of CH3NH3PbI3−xClx hybrid solar cells Reviewed

K. Suzuki, A. Suzuki, M. Zushi, and T. Oku

AIP Conference Proceedings 1649 96 - 101 2015.2

Fabrication and characterization of photovoltaic devices based on perovskite compounds with TiO2 nanoparticles Reviewed

M. Kanayama, T. Oku, A. Suzuki, M. Yamada, S. Fukunishi, K. Kohno, and H. Sakamoto

AIP Conference Proceedings 1649 84 - 88 2015.2

Construction and characterization of spherical Si solar cells combined with SiC electric power inverter Reviewed

T. Oku, T. Matsumoto, K. Hiramatsu, M. Yasuda, A. Shimono, Y. Takeda, and M. Murozono

AIP Conference Proceedings 1649 79 - 83 2015.2

Fabrication and characterization of inverted organic solar cells using shuttle cock-type metal phthalocyanine and PCBM:P3HT Reviewed

A. Suzuki, R. Furukawa, T. Akiyama, and T. Oku

AIP Conference Proceedings 1649 107 - 112 2015.2

Fabrication and characterization of organic solar cells using metal complex of phthalocyanines Reviewed

T. Kida, A. Suzuki, T. Akiyama, and T. Oku

AIP Conference Proceedings 1649 102 - 106 2015.2

Hydrogen storage in boron nitride and carbon nanomaterials Reviewed

T. Oku

Energies 8 ( 319 ) 337 2014.12

Microstructures and photovoltaic properties of perovskite-type CH3NH3PbI3 compounds Reviewed

T. Oku, M. Zushi, Y. Imanishi, A. Suzuki and K. Suzuki

Applied Physics Express 7 121601–1 - 121601–4 2014.11

Facile fabrication and photovoltaic application of [60]Fullerene assembly films formed by reaction between fullerene and amines Reviewed

246. S. Banya, T. Akiyama, T. Matsumoto, K. Fujita and T. Oku

Bulletin of the Chemical Society of Japan 87 1335 - 1342 2014.9

Fabrication and characterization of organic solar cells using titanylphthalocyanine as hole transport layer Reviewed

M. Iwase, A. Suzuki, T. Akiyama and T. Oku

Physica Status Solidi A 211 2861 - 2864 2014.8

Role of scandium atom in ScxY3–xN@C80(CF3)n (n = 0, 2) on nuclear quadrupole interaction, electric field gradient and asymmetric parameters Reviewed

A. Suzuki, T. Oku

Microelectronic Engineering 126 113 - 117 2014.8

C60–ethylenediamine adduct thin film as a buffer layer for inverted-type organic solar cells Reviewed

Y. Ono, T. Akiyama, S. Banya, D. Izumoto, J. Saito, K. Fujita, H. Sakaguchi, A. Suzuki and T. Oku

RSC Advances 4 34950 - 34954 2014.8

High-resolution electron microscopy and electron diffraction of perovskite-type superconducting copper oxides Invited Reviewed

T. Oku

Nanotechnology Reviews 3 413 - 444 2014.6

Effects of Au nanoparticle addition to hole transfer layer in organic solar cells based on copper naphthalocyanine and fullerene Reviewed

A. Nagata, T. Oku, T. Akiyama, A. Suzuki

Progress in Natural Science: Materials International 24 179 - 183 2014.6

Fabrication and characterization of TiO2/CH3NH3PbI3-based photovoltaic devices Reviewed

M. Zushi, A. Suzuki, T. Akiyama, and T. Oku

Chemistry Letters 43 916 - 918 2014.6

Effect of gold nanoparticle in hole-transport layer on inverted organic thin-film solar cell performance Reviewed

T. Akiyama, T. Nishida, T. Matsumoto, H. Sakaguchi, A. Suzuki, T. Oku

Physica Status Solidi A 211 1645 - 1650 2014.5

Fabrication and characterization of PCBM:P3HT:silicon phthalocyanine bulk heterojunction solar cells with inverted structures Reviewed

T. Oku, S. Hori, A. Suzuki, T. Akiyama and Y. Yamasaki

Japanese Journal of Applied Physics 53 05FJ08-1 - 05FJ08-5 2014.4

Electronic structures and magnetic properties of Sc4O2@C80(CF3)n (n = 2 and 4) Reviewed

Y. Abe, A. Suzuki and T. Oku

Japanese Journal of Applied Physics 53 05FN02-1 - 05FN02-5 2014.4

Electronic structures and magnetic properties of Sc2YN@C80(CF3)2 dimer Reviewed

A. Suzuki and T. Oku

Japanese Journal of Applied Physics 53 05FN01-1 - 05FN01-5 2014.4

Microstructures, optical and photoelectric conversion properties　of spherical silicon solar cells with anti-reflection SnOx:F thin films Reviewed

T. Oku, M. Kanayama, Y. Ono, T. Akiyama, Y. Kanamori, and M. Murozono

Japanese Journal of Applied Physics 53 05FJ03-1 - 05FJ03-7 2014.4

Fabrication and characterization of phthalocyanine-based organic solar cells Reviewed

M. Iwase, A. Suzuki, T. Akiyama and T. Oku

Materials Sciences and Applications 5 278 - 284 2014.4

Microstructures and photovoltaic properties of Zn(Al)O/Cu2O-based solar cells prepared by spin-coating and electrodeposition Reviewed

T. Oku, T. Yamada, K. Fujimoto and T. Akiyama

Coatings 4 203 - 213 2014.3

Synthesis of crystalline Cu2O nanoparticles using long chained alcohol Reviewed

K. Nishimura, J. Cuya Huaman, H. Miyamura, T. Akiyama, T. Oku, B. Jeyadevan

Materials Research Express 1 ( 015032-1 ) 015032-13 2014.3

Effects of germanium tetrabromide addition to zinc tetraphenyl porphyrin / fullerene bulk heterojunction solar cells Reviewed

A. Suzuki, K. Nishimura and T. Oku

Electronics 3 112 - 121 2014.3

Hydrogen storage in boron nitride and carbon nanomaterials Reviewed

T. Oku

Sciforum Electronic Conference Series 1 d003-1 - d003-17 2014.3

Effect of annealing on photovoltaic properties and microstructure of conventional and inverted organic solar cells using active bilayer based on liquid-crystal semiconducting polymer and fullerene Reviewed

A. Suzuki, H. Suzuki, H. Maruhashi, S. Banya, T. Akiyama and T. Oku

International Journal of Energy Research 38 1541 - 1550 2014.2

Photovoltaic properties and morphology of organic solar cells based on liquid-crystal semiconducting polymer with additive Reviewed

A. Suzuki, M. Zushi, H. Suzuki, S. Ogahara, T. Akiyama and T. Oku

AIP Conference Proceedings 1585 164 - 170 2014.2

Microstructure analysis and properties of spherical silicon solar cells with anti-reflection thin films Reviewed

T. Oku, M. Kanayama, T. Akiyama, Y. Kanamori and M. Murozono

Physica Status Solidi C 10 1840 - 1843 2013.11

Mixing effect of gold and silver nanoparticles on enhancement in performance of organic thin-film solar cells Reviewed

T. Akiyama, T. Yamamoto, T. Oku, M. Yahiro, T. Kurihara, C. Adachi and S. Yamada

Japanese Journal of Applied Physics 52 122301-1 - 122301-4 2013.11

Fabrication and characterization of PCBM:P3HT bulk heterojunction solar cells doped with silicon naphthalocyanine Reviewed

T. Oku, K. Yoshida, A. Suzuki, T. Akiyama and Y. Yamasaki

Physica Status Solidi C 10 1836 - 1839 2013.11

Effects of phosphorus addition to poly-methyl-phenyl-silane based photovoltaic devices Reviewed

T. Oku, J. Nakagawa, A. Suzuki, T. Akiyama, M. Yamada, S. Fukunishi, K. Kohno and M. Sasaki

Physica Status Solidi C 10 1832 - 1835 2013.11

Influence of chemical substitution in ScxY3-xN@C80(CF3)n endohedral fullerenes on magnetic properties Reviewed

A. Suzuki, T. Oku

Physica B 428 18 - 26 2013.11

Fabrication and characterization of ZnO/Cu2O solar cells prepared by electrodeposition Reviewed

K. Fujimoto, T. Oku and T. Akiyama

Applied Physics Express 6 086503-1. - 086503-3 2013.7

Fabrication and characterization of fullerene-based solar cells containing phthalocyanine and naphthalocyanine dimers

A. Takeda, T. Oku, A. Suzuki, T. Akiyama, Y. Yamasaki

Synthetic Metals 177 48 - 51 2013.7

Fabrication and characterization of PCBM:P3HT bulk heterojunction solar cells doped with germanium phthalocyanine or germanium naphthalocyanine Reviewed

K. Yoshida, T. Oku, A. Suzuki, T. Akiyama, Y. Yamasaki

Materials Sciences and Applications 4 1 - 5 2013.6

Microstructures and photovoltaic properties of polysilane-based solar cells Reviewed

T. Oku, J. Nakagawa, M. Iwase, A. Kawashima, K. Yoshida, A. Suzuki, T. Akiyama, K. Tokumitsu, M. Yamada and M. Nakamura

Japanese Journal of Applied Physics 52 04CR07-1 - 04CR07-5 2013.5

Incorporation effect of silver nanoparticles on inverted type bulk-heterojunction organic solar cells Reviewed

T. Matsumoto, T. Oku and T. Akiyama

Japanese Journal of Applied Physics 52 04CR13-1 - 04CR13-5 2013.4

Fabrication and characterization of silicon naphthalocyanine, gallium phthalocyanine and fullerene-based organic solar cells with inverted structures Reviewed

T. Oku, S. Nose, K. Yoshida, A. Suzuki, T. Akiyama and Y. Yamasaki

Journal of Physics: Conference Series 433 012025-1 - 012025-7 2013.4

Fabrication and characterization of copper oxide-zinc oxide solar cells prepared by electrodeposition Reviewed

K. Fujimoto, T. Oku, T. Akiyama and A. Suzuki

Journal of Physics: Conference Series 433 012024-1 - 012024-7 2013.4

Fabrication and characterization of polymer tandem solar cells Reviewed

H. Maruhashi, A. Suzuki, T. Akiyama and T. Oku

Journal of Physics: Conference Series 433 012023-1 - 012023-6 2013.4

Fabrication of C60 assembly films via an fullerene-amine addition reaction by using stepwise immersion Reviewed

S. Banya, T. Matsumoto, T. Oku and T. Akiyama

Journal of Physics: Conference Series 433 012007-1 - 012007-5 2013.4

Photochemical half-cells using mixture films of fullereneethylenediamine adduct microparticles and polythiophene Reviewed

T. Akiyama, S. Matsumura, K.-i. Matsuoka, T. Oku, S. Yamada

Journal of Physics: Conference Series 433 012010-1 - 012010-6 2013.4

Electronic structure and magnetic properties of endohedral metallofullerenes based on mixed metal cluster within fullerene cage with trifluoromethyl groups Reviewed

A. Suzuki and T. Oku

Journal of Physics: Conference Series 433 012004-1 - 012004-7 2013.4

Magnetic properties of endohedral metallofullerenes based on asymmetric nitride yttrium cluster within azafullerenes Reviewed

H. Nakagawa, A. Suzuki and T. Oku

Journal of Physics: Conference Series 433 ( 012005-1 ) 012005-7 2013.4

Effects of phosphorous doping to poly (methylphenyl silane) and fabrication of thin film solar cells Reviewed

J. Nakagawa, T. Oku, A. Suzuki, T. Akiyama, K. Tokumitsu, M. Yamada and M. Nakamura

Journal of Physics: Conference Series 433 012026-1 - 012026-7 2013.4

Facile solubilization and photovoltaic application of C60 fullerene-ethylenediamine adduct Reviewed

T. Akiyama, T. Ueda, Y. Ono, K. Kimura, K. -i. Matsuoka, S. Yamada and T. Oku

Chemistry Letters 42 177 - 179 2013.2

Microstructures and photovoltaic properties of C60-based solar cells with copper oxides, CuInS2, phthalocyanines, porphyrin, PVK, nanodiamond, germanium and exciton-diffusion blocking layers Reviewed

T. Oku, A. Takeda, A. Nagata, H. Kidowaki, K. Kumada, K. Fujimoto, A. Suzuki, T. Akiyama, Y. Yamasaki, E. Ōsawa

Materials Technology 28 21 - 39 2013.1

Fabrication and characterization of phthalocyanine/C60 solar cells with inverted structure Reviewed

K. Yoshida, T. Oku, A. Suzuki, T. Akiyama, Y. Yamasaki

Advances in Chemical Engineering and Science 2 461 - 464 2012.10

Direct structure analysis of advanced nanomaterials by high-resolution electron microscopy Reviewed

T. Oku

Nanotechnology Reviews 1 389 - 425 2012.10

Fabrication and characterization of bulk heterojunction solar cells based on liquid-crystal semiconductive polymer Reviewed

A. Suzuki, S. Ogahara, T. Akiyama, T. Oku

Energy and Power Engineering 4 459 - 464 2012.10

Fabrication and characterization of poly[decaphenylcyclopentasilane]-based solar cells Reviewed

M. Iwase, T. Oku, A. Suzuki, T. Akiyama, K. Tokumitsu, M. Yamada and M. Nakamura

Advances in Materials Physics and Chemistry 2 2 121 - 125 2012.9

Fabrication and evaluation of CuO/ZnO heterostructures for photoelectric conversion Reviewed

H. Kidowaki, T. Oku, T. Akiyama

International Journal of Research and Reviews in Applied Sciences 13 67 - 72 2012.9

Microstructures and photovoltaic properties of polysilane/C60-based solar cells Reviewed

A. Kawashima, T. Oku, A. Suzuki, K. Kikuchi, S. Kikuchi

Materials Sciences and Applications 3 557 - 561 2012.9

Fabrication and characterization of tetracyanoquinodimethane/phthalocyanine solar cells Reviewed

A. Suzuki, T. Ohtsuki, T. Oku, T. Akiyama

Materials Science and Engineering: B 177 877 - 881 2012.6

Microstructures and photovoltaic properties of fullerene-based organic-inorganic hybrid solar cells Reviewed

T. Oku, A. Takeda, A. Nagata, K. Fujimoto, T. Akiyama, A. Suzuki

Journal of Physics: Conference Series 352 012024-1 - 012024-9 2012.5

Fabrication and characterization of CuO/ZnO solar cells Reviewed

H. Kidowaki, T. Oku, T. Akiyama

Journal of Physics: Conference Series (2012) 352 012022-1 - 012022-5 2012.5

Fabrication and characterization of polysilane/C60 thin film solar cells Reviewed

J. Nakagawa, T. Oku, A. Suzuki, T. Akiyama, K. Tokumitsu, M. Yamada, M. Nakamura.

Journal of Physics: Conference Series 352 012019-1 - 012019-5 2012.5

Electronic structure and magnetic properties of 31P@C60-SWCNT as peapods Reviewed

A. Suzuki and T. Oku

Journal of Physics: Conference Series (2012) 352 012012-1 - 012012-8 2012.5

Fabrication and characterization of poly[diphenylsilane]-based solar cells Reviewed

M. Iwase, T. Oku, A. Suzuki, T. Akiyama, K. Tokumitsu, M. Yamada and M. Nakamura

Journal of Physics: Conference Series 352 352 012018-1 - 012018-5 2012.5

Microstructure analysis of spherical silicon solar cells coated with anti-reflection films Reviewed

Y. Ono, T. Oku, T. Akiyama, Y. Kanamori, Y. Ohnishi, Y. Ohtani, M. Murozono

Journal of Physics: Conference Series 352 012023-1 - 012023-5 2012.5

Effect of an amorphous TiO2 addition on dye-sensitized solar cells with organic dyes Reviewed

N. Kakuta, T. Oku, A. Suzuki, K. Kikuchi and S. Kikuchi

Journal of Ceramic Processing Research 13 28 - 31 2012.2

Effect of perylenetetracarboxylic dianhydride layer as a hole blocking layer on photovoltaic performance of poly-vinylcarbazole:C60 bulk heterojunction thin films Reviewed

T. Oku, K. Nomura, A. Suzuki, K. Kikuchi

Thin Solid Films 520 2545 - 2548 2012.2

Effects of germanium addition to copper phthalocyanine/fullerene-based solar cells Reviewed

T. Oku, K. Kumada, A. Suzuki and K. Kikuchi

Central European Journal of Engineering 2 248 - 252 2012.2

Fabrication and characterization of CuO-based solar cells Reviewed

H. Kidowaki, T. Oku, T. Akiyama, A. Suzuki, B. Jeyadevan, J. Cuya

Journal of Materials Science Research 1 138 - 143 2012.1

Structures and photovoltaic properties of copper oxides / fullerene solar cells Reviewed

T. Oku, R. Motoyoshi, K. Fujimoto, T. Akiyama, B. Jeyadevan, J. Cuya

Journal of Physics and Chemistry of Solids 72 1206 - 1211 2011.11

Effects of Au nanoparticle addition to hole transfer layer in organic photovoltaic cells based on phthalocyanines and fullerene Reviewed

A. Nagata, T. Oku, T. Akiyama, A. Suzuki, Y. Yamasaki, T. Mori

Journal of Nanotechnology 2011 869596-1 - 869596-6 2011.11

Fabrication and characterization of copper oxides/fullerene solar cells prepared by an electrodeposition method Reviewed

K. Fujimoto, T. Oku and T. Akiyama

Journal of the Ceramic Society of Japan 119 402 - 404 2011.9

Theoretical study of gallium phthalocyanine dimer-fullerene complex for photovoltaic device Reviewed

A. Takeda, T. Oku, A. Suzuki, Y. Yamasaki

Journal of Modern Physics 2 966 - 969 2011.9

Geometrical effects of 14N@C60, (14N@C60)2 and C59N endohedral fullerenes within single-walled carbon nanotube as peapods on electronic structure and magnetic properties Reviewed

A. Suzuki and T. Oku

Physica B 406 3274 - 3278 2011.8

High-resolution electron microscopy of nanostructured materials Reviewed

T. Oku

Nanoscience & Nanotechnology-Asia 1 59 - 75 2011.7

Fabrication and characterization of TiO2-based dye-sensitized solar cells Reviewed

T. Oku, N. Kakuta, K. Kobayashi, A. Suzuki, K. Kikuchi

Progress in Natural Science 21 46 - 50 2011.6

Fabrication and characterization of porphyrin dye-sensitized solar cells Reviewed

A. Suzuki, K. Kobayashi, T. Oku and K. Kikuchi

Materials Chemistry and Physics 129 236 - 241 2011.5

Formation and characterization of phthalocyanine dimer/C60 solar cells Reviewed

A. Takeda, A Minowa, T. Oku*, A. Suzuki, K. Kikuchi , Y. Yamasaki

Progress in Natural Science: Materials International 21 27 - 30 2011.2

Fabrication, nanostructures and electronic properties of nanodiamond-based solar cells Reviewed

A. Nagata, T. Oku*, K. Kikuchi, A. Suzuki, Y. Yamasaki, E. Ōsawa

Progress in Natural Science: Materials International 20 38 - 43 2010.12

Fabrication and photovoltaic property of diamond:fullerene nanocomposite thin films Reviewed

A. Nagata, T. Oku*, A. Suzuki, K. Kikuchi, S. Kikuchi

Journal of the Ceramic Society of Japan 118 1006 - 1008 2010.11

Structure and photovoltaic activity of cupric oxide-based thin film solar cells Reviewed

R. Motoyoshi, T. Oku*, H. Kidowaki, A. Suzuki, K. Kikuchi, S. Kikuchi, B. Jeyadevan

Journal of the Ceramic Society of Japan 118 1021 - 1023 2010.11

Fabrication and characterization of copper system compound semiconductor solar cells Reviewed

R. Motoyoshi, T. Oku*, A. Suzuki, K. Kikuchi, S. Kikuchi, B. Jeyadevan and J. Cuya

2010 562842 - 11 page 2010.9

Fabrication and characterization of C60/tetrathiafulvalene solar cells Reviewed

71 1587 - 1591 2010.9

Fabrication and characterization of cuprous oxide: fullerene solar cells Reviewed

R. Motoyoshi, T. Oku*, A. Suzuki, K. Kikuchi, S. Kikuchi, B. Jeyadevan, J. Cuya

160 1219 - 1222 2010.6

Electronic structure and magnetic properties of 14N@C60 within single-walled carbon nanotube as peapods Reviewed

405 2418 - 2422 2010.6

Fabrication and characterization of fullerene-based bulk heterojunction solar cells with porphyrin, CuInS2, diamond and exciton-diffusion blocking layer Reviewed

T. Oku, A. Takeda, A. Nagata, T. Noma, A. Suzuki and K. Kikuchi

Energies 3 671 - 685 2010.4

Magnetic properties of the FeII spin crossover complex in emulsion polymerization of trifluoroethylmethacrylate using poly(vinyl alcohol) Reviewed

A. Suzuki, M. Iguchi, T. Oku, M. Fujiwara

Journal of Solid State Chemistry 183 951 - 956 2010.2

The effects of exciton-diffusion blocking layers on pentacene/C60 bulk heterojunction solar cells Reviewed

K. Nomura, T. Oku, A. Suzuki, K. Kikuchi and G. Kinoshita

J. Phys. Chem. Solids 71 210 - 213 2010.2

Fabrication and characterization of titanium dioxide/copper indium disulfide solar cells Reviewed

R. Motoyoshi, T. Oku, A. Suzuki, K. Kikuchi

J. Ceram. Soc. Jpn. 118 30 - 33 2010.1

Fabrication and characterization of fullerene / porphyrin bulk heterojunction solar cells Reviewed

T. Oku, T. Noma, A. Suzuki, K. Kikuchi and S. Kikuchi

J. Phys. Chem. Solids 71 551 - 555 2010.1

Fabrication and characterization of mixture type dye-sensitized solar cells with organic dyes Reviewed

N. Kakuta, T. Oku, A. Suzuki, K. Kikuchi and S. Kikuchi

J. Ceram. Soc. Jpn. 117 964 - 966 2009.11

Fabrication and characterization of inorganic-organic hybrid solar cells based on CuInS2 Reviewed

A. Takeda, T. Oku, A. Suzuki, K. Kikuchi and S. Kikuchi

J. Ceram. Soc. Jpn. 117 967 - 969 2009.9

Synthesis of boron nitride and carbon nanomaterials through a solid phase reduction process Reviewed

H. Tokoro, S. Fujii and T. Oku

Materials Chemistry and Physics 114 204 - 212 2009.4

Concentration determination of oxygen nanobubble in electrolyzed water Reviewed

K. Kikuchi, A. Ioka, T. Oku, Y. Tanaka, Y. Saihara and Z. Ogumi

J. Colloid and Interface Sci. 329 306 - 309 2009.4

Cobalt nanocrystallites encapsulated in boron nitride shells Reviewed

J.M. Calderon-Moreno, T. Pradell, D. Crespo, M. Popa, I. Narita, T. Oku

Mater. Sci. Eng. B, 162 106 - 110 2009.4

Role of electrolytes in the preparation of nanoparticles via the emulsion polymerization of vinyl pivalate Reviewed

K. Kikuchi, M. Kitawaki, A. Suzuki, T. Oku

J. Colloid and Interface Sci. 338 480 - 485 2009.4

Formation and characterization of copper tetrakis (4-cumylphenoxy) phthalocyanine:perylene solar cells Reviewed

R. Motoyoshi, A. Suzuki, K. Kikuchi and T. Oku

Synthetic Metals 159 1345 - 1348 2009.4

Formation and characterization of polymer/fullerene bulk heterojunction solar cells Reviewed

T. Oku, S. Nagaoka, A. Suzuki, K. Kikuchi, Y. Hayashi, H. Inukai, H. Sakuragi, T. Soga

J. Phys. Chem. Solids 69 1276 - 1279 2008.4

Structures and purification of boron nitride nanotubes synthesized from boron-based powders with iron particles Reviewed

43 2955 - 2961 2008.4

Formation and characterization of MEH-PPV/PCBM-based bulk heterojunction solar cells Reviewed

T. Oku, S. Nagaoka, A. Suzuki, K. Kikuchi, Y. Hayashi, H. Sakuragi, T. Soga

J. Ceramic Processing Res. 9 549 - 552 2008.4

Effect of central metal ion, CoII in the FeII spin-crossover complex in emulsion polymerization of trifluoroethylmethacrylate using poly(vinyl alcohol) Reviewed

A. Suzuki, M. Iguchi, T. Oku and M. Fujiwara

Materials Transactions 49 2465 - 2468 2008.4

Formation and characterization of bulk hetero-junction solar cells using C60 and perylene Reviewed

T. Oku, N. Kakuta, A. Kawashima, K. Nomura, R. Motoyoshi, A. Suzuki, K. Kikuchi and G. Kinoshita

Materials Transactions 49 2457 - 2460 2008.4

Growth of boron nitride nanohorn structures Reviewed

T. Oku, K. Hiraga and T. Matsuda

Materials Transactions 49 2461 - 2464 2008.4

Synthesis and nanostructure of boron nitride nanotubes grown from iron-evaporated boron Reviewed

T. Oku, N. Koi and K. Suganuma

Diamond Relat. Mater. 17 1805 - 1807 2008.4

Electronic and optical properties of boron nitride nanotubes Reviewed

T. Oku, N. Koi and K. Suganuma

J. Phys. Chem. Solids 69 1228 - 1231 2008.4

Effects of titanium addition on the microstructure of carbon/copper composite materials Reviewed

T. Oku and T. Oku

Sol.State Comm. 141 ( － ) 132 - 135 2007.4

Formation and atomic structures of boron nitride nanotubes with cup-stacked and Fe nanowire encapsulated structures Reviewed

T. Oku, N. Koi, I. Narita, K. Suganuma and M. Nishijima

Materials Transactions 48 ( － ) 722 - 729 2007.4

固相還元反応を利用したBN/Cナノ物質の合成 Reviewed

所久人、藤井重男、奥健夫

日本金属学会報 Materia 46 ( 6 ) 406 - 412 2007.4

Formation and atomic structure of boron nitride nanotubes with a cup-stacked structure Reviewed

T. Oku, N. Koi, K. Suganuma, R. V. Belosludov, Y. Kawazoe

Sol.State Comm. 143 ( － ) 331 - 336 2007.4

Atomic structures and formation mechanism of boron nitride nanotubes and nanohorns synthesized by arc-melting LaB6 powders Reviewed

A. Nishiwaki and T. Oku

J. Euro. Ceram. Soc. 26 ( － ) 435 - 441 2006.4

Atomic structures of bamboo-type boron nitride nanotubes with cup-stacked structures Reviewed

T. Oku, I. Narita and A. Nishiwaki

J. Euro. Ceram. Soc. 26 ( － ) 443 - 448 2006.4

YB56の3次元高分解能像 Reviewed

奥健夫

日本金属学会報 Materia 45 ( 12 ) 864 - 864 2006.4

Fabrication of hollow and sandwiched structure Ag nanoclusters by high-dose ion implantation Reviewed

F. Ren, C. Jiang, C. Liu, J. Wang and T. Oku

Phys. Rev. Lett. 97 ( － ) 165501-1-4 - 165501-1-4 2006.4

Synthesis and structures of iron nanoparticles coated with boron nitride nanomaterials Reviewed

I. Narita, T. Oku, H. Tokoro and K. Suganuma

J. Electron Microsc. 55 ( － ) 123 - 127 2006.4

Synthesis and magnetic property of boron nitride nanocapsules encaging iron and cobalt nanoparticles Reviewed

T. Oku, I. Narita and H.Tokoro

J. Phys. Chem. Solids 67 ( － ) 1152 - 1156 2006.4

Epitaxial growth of Cu nanodot arrays using an AAO template on a Si substrate Reviewed

T. Shimizu, M. Nagayanagi, T. Ishida, O. Sakata, T. Oku, H. Sakaue, T. Takahagi and S. Shingubara

Electrochem. Solid-State Lett. 9 ( － ) J13 - 16 2006.4

Synthesis of Co nanocapsules coated with BN layers by annealing of KBH4 and [Co(NH3)6]Cl3 Reviewed

I. Narita, T. Oku, H. Tokoro, K. Suganuma

Sol. State Comm. 137 ( － ) 44 - 48 2006.4

Magnetic fine particles of Fe and Co encapsulated by carbon layers Reviewed

H. Tokoro, S. Fujii, T. Oku

J. Magn. Magn. Mater. 290 ( － ) 141 - 144 2005.4

Atomic structures of multi-walled boron nitride nanohorns Reviewed

A. Nishiwaki and T. Oku

J. Electron Microsc. 54 ( － ) i9 - i14 2005.4

Atomic and electronic structures of boron nitride nanohorns studied by high-resolution electron microscopy and molecular orbital calculations Reviewed

A. Nishiwaki and T. Oku

Diamond Relat. Mater. 14 ( － ) 1183 - 1189 2005.4

Synthesis of huge boron nitride cages Reviewed

N. Koi, T. Oku, I. Narita and K. Suganuma

Diamond Relat. Mater. 14 ( － ) 1190 - 1192 2005.4

Atomic structures and stability of boron nitride nanotubes with a cup-stacked structure Reviewed

A. Nishiwaki, T. Oku, H. Tokoro and S. Fujii

Diamond Relat. Mater. 14 ( － ) 1163 - 1168 2005.4

Atomic and electronic structures of multiply-twinned boron nitride nanoparticles with fivefold symmetry Reviewed

T. Oku, N. Koi and A. Nishiwaki

Diamond Relat. Mater. 14 ( － ) 1193 - 1197 2005.4

Formation and atomic structures of boron nitride nanohorns encaging boron nitride cluster Reviewed

T. Oku and A. Nishiwaki

Physica E 29 ( － ) 712 - 715 2005.4

Effect of carbon addition on synthesis of BN nanolayers encapsulating Fe fine particles and BN nanotubes Reviewed

H. Tokoro, S. Fujii, T. Oku

Solid State Commun. 133 ( － ) 681 - 685 2005.4

BNナノ物質の構造と物性 Reviewed

奥健夫、成田一人、西脇篤史、小井成弘、所久人、藤井重男、平賀贒二、川添良幸

ナノ学会会報 3 ( 2 ) 71 - 85 2005.4

Fe nanowire encapsulated in boron nitride nanotubes Reviewed

N. Koi, T. Oku and M. Nishijima

Sol. State Comm. 136 ( － ) 342 - 345 2005.4

Effects of endohedral element in B24N24 clusters on hydrogenation studied by molecular orbital calculations Reviewed

N. Koi, T. Oku, K. Suganuma

Physica E 29 ( － ) 541 - 545 2005.4

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