Faculty Profiles - OKU Takeo

Papers - OKU Takeo

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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

Scopus

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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

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85033225779&origin=inward

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

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85002804525&origin=inward

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

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