Faculty Profiles - SUZUKI Atsushi

Papers - SUZUKI Atsushi

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

Masato Kanayama, Takeo Oku, Atsushi Suzuki, Masahiro Yamada, Sakiko Fukunishi, Kazufumi Kohno, and Hiroki Sakamoto

AIP Conference Proceedings 164 84 - 88 2015.1

Formation of Thin Films of Densely Packed [60]FullereneDiaminoethane Adduct Microparticles at a Liquid/Liquid Interface and Their Photoelectrochemical Applications Reviewed

Shoto Banya, Tsuyoshi Akiyama, Daisuke Izumoto, Atsushi Suzuki, and Takeo Oku

Chem. Lett. 44 ( 4 ) 489 - 491 2015.1

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

Haruto Maruhashi, Takeo Oku, Atsushi Suzuki, Tsuyoshi Akiyama, Yasuhiro Yamasaki

IRAGO CONFERENCE 2014 1649 89 - 95 2015

Language：English Publishing type：Research paper (international conference proceedings) Publisher：AMER INST PHYSICS

[6,6]-phenyl C-61-butyric acid methyl ester and poly(3-hexylthiophene) bulk heterojunction solar cells added with zinc-tetra-tertiary-butyl-phthalocyanine (ZnPc) were fabricated and characterized. The photovoltaic properties of the solar cells with an inverted structure were improved by the ZnPc addition, which were investigated on the bases of current density-voltage characteristics, incident photon to current conversion efficiency.

DOI： 10.1063/1.4913550

Web of Science

Microstructures and properties of CH3NH3PbI3-xClx hybrid solar cells Reviewed

Kohei Suzuki, Atsushi Suzuki, Masahito Zushi, Takeo Oku

IRAGO CONFERENCE 2014 1649 96 - 101 2015

Language：English Publishing type：Research paper (international conference proceedings) Publisher：AMER INST PHYSICS

Halide-perovskite CH3NH3PbI3 was produced on mesoporous TiO2 layer by spin-coating a precursor solution of PbCl2 and CH3NH3I in dimethylformamide. The role of the annealing process and chlorine (Cl) doping for the perovskite-phase formation was investigated. It was found that crystallization of the perovskite materials was stimulated by the annealing process, and that longer annealing time is necessary for the Cl-doped perovskite compared with that of non-doped perovskite phase.

DOI： 10.1063/1.4913551

Web of Science

Microstructures and properties of CH3NH3PbI3-xClx hybrid solar cells Reviewed

Kohei Suzuki, Atsushi Suzuki, Masahito Zushi, Takeo Oku

IRAGO CONFERENCE 2014 1649 96 - 101 2015

Language：English Publishing type：Research paper (international conference proceedings) Publisher：AMER INST PHYSICS

DOI： 10.1063/1.4913551

Web of Science

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

Masato Kanayama, Takeo Oku, Atsushi Suzuki, Masahiro Yamada, Sakiko Fukunishi, Kazufumi Kohno, Hiroki Sakamoto

IRAGO CONFERENCE 2014 1649 84 - 88 2015

Language：English Publishing type：Research paper (international conference proceedings) Publisher：AMER INST PHYSICS

Perovskite-type photovoltaic devices were fabricated by a spin-coating method using a mixture solution. The compact and meso-porous TiO2 of the solar cells were fabricated from TiO2 nanoparticles and sol, and the photovoltaic properties and microstructures were characterized. The conversion efficiencies were improved by the combination of TiO2 nanoparticles and sol. Current density was also improved by increasing numbers of spin-coatings of meso-porous TiO2. Thick meso-porous TiO2 layers would assist the construction of perovskite layers and block of the leak current.

DOI： 10.1063/1.4913549

Web of Science

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

Masato Kanayama, Takeo Oku, Atsushi Suzuki, Masahiro Yamada, Sakiko Fukunishi, Kazufumi Kohno, Hiroki Sakamoto

IRAGO CONFERENCE 2014 1649 84 - 88 2015

Language：English Publishing type：Research paper (international conference proceedings) Publisher：AMER INST PHYSICS

DOI： 10.1063/1.4913549

Web of Science

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

Haruto Maruhashi, Takeo Oku, Atsushi Suzuki, Tsuyoshi Akiyama, Yasuhiro Yamasaki

IRAGO CONFERENCE 2014 1649 89 - 95 2015

Language：English Publishing type：Research paper (international conference proceedings) Publisher：AMER INST PHYSICS

DOI： 10.1063/1.4913550

Web of Science

Fabrication and Characterization of Inverted Organic Solar Cells using Shuttle Cock-Type Metal Phthalocyanine and PCBM:P3HT Reviewed

Atsushi Suzuki, Ryo Furukawa, Tsuyoshi Akiyama, Takeo Oku

IRAGO CONFERENCE 2014 1649 107 - 112 2015

Language：English Publishing type：Research paper (international conference proceedings) Publisher：AMER INST PHYSICS

Inverted organic solar cells using shuttle cock-type phthalocyanine, semiconducting polymer and fullerenes were fabricated and characterized. Photovoltaic and optical properties of the solar cells with inverted structures were investigated by optical absorption, current density-voltage characteristics. The photovoltaic properties of the tandem organic solar cell using titanyl phthalocyanine, vanadyl phthalocyanine, poly(3-hexylthiophene) (P3HT) and [6, 6]-phenyl C61-butyric acid methyl ester (PCBM) were improved. Effect of annealing and solvent treatment on surface morphologies of the active layer was investigated. The photovoltaic mechanisms, energy levels and band gap of active layers were discussed for improvement of the photovoltaic performance.

DOI： 10.1063/1.4913553

Web of Science

Fabrication and Characterization of Organic Solar Cells using Metal Complex of Phthalocyanines Reviewed

Tomoyasu Kida, Atsushi Suzuki, Tsuyoshi Akiyama, Takeo Oku

IRAGO CONFERENCE 2014 1649 102 - 106 2015

Language：English Publishing type：Research paper (international conference proceedings) Publisher：AMER INST PHYSICS

Fabrication and characterization of organic solar cells using shuttle-cock-type phthalocyanines were carried out. Photovoltaic properties of the solar cells with inverted structures were investigated by current density-voltage characteristics. Effects of phase transition between H and J aggregates on the photovoltaic and optical properties were investigated. The photovoltaic mechanisms, energy levels and band gap of active layers were discussed.

DOI： 10.1063/1.4913552

Web of Science

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

Makoto Iwase, Atsushi Suzuki, Tsuyoshi Akiyama, and Takeo Oku

Phys. Status Solidi A 211 ( 12 ) 2861 - 2864 2014.8

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

Yuji Ono, Tsuyoshi Akiyama, Shoto Banya, Daisuke Izumoto, Jo Saito, Katsuhiko Fujita, Hiroshi Sakaguchi, Atsushi Suzuki and Takeo Oku

The Royal Society of Chemistry Advances 4 34950 - 34954 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

Atsushi Suzuki, Takeo Oku

Microelectronic Engineering 126 ( 25 ) 113 - 117 2014.7

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

Atsushi Suzuki, Takeo Oku

Microelectronic Engineering 126 ( 25 ) 113 - 117 2014.7

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

Akihiko Nagata, Takeo Oku, Tsuyoshi Akiyama, Atsushi Suzuki

Progress in Natural Science Materials International 24 179 - 183 2014.6

Fabrication and Characterization of TiO2/CH3NH3PbI3-based Photovoltaic Devices Reviewed

Masahito Zushi, Atsushi Suzuki, Tsuyoshi Akiyama, Takeo Oku

Chemistry Letter 43 ( 6 ) 916 - 918 2014.6

Fabrication and Characterization of TiO2/CH3NH3PbI3-based Photovoltaic Devices Reviewed

Masahito Zushi, Atsushi Suzuki, Tsuyoshi Akiyama, Takeo Oku

CHEMISTRY LETTERS 43 ( 6 ) 916 - 918 2014.6

Language：English Publishing type：Research paper (scientific journal) Publisher：CHEMICAL SOC JAPAN

TiO2/CH3NH3PbI3-based photovoltaic devices were fabricated by a spin-coating method using a mixture solution. Photovoltaic properties of the solar cells were investigated by optical absorption, current density-voltage characteristics, and incident photon to current conversion efficiency. Effects of TiO2 addition and hole-transport layers were also investigated. Microstructures of the cells were investigated by transmission electron microscopy, which indicated a nanoparticle structure of TiO2, and atomic arrangements of Pb atoms in the CH3NH3PbI3 crystal were also directly observed.

DOI： 10.1246/cl.140127

Web of Science

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

Akihiko Nagata, Takeo Oku, Tsuyoshi Akiyama, Atsushi Suzuki

PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL 24 ( 3 ) 179 - 183 2014.6

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE INC

Organic solar cells based on copper naphthalocyanine (CuNc) and fullerene ((C-60) were fabricated, and their photovoltaic properties were investigated. C-60 and CuNc were used as n-type and p-type semiconductors, respectively. In addition, the effect of Au nanoparticle addition on a hole transfer layer was investigated, and the power conversion efficiency of the devices).vas improved after blending the Au nanoparticles into the hole transport layer. Nanostruchtres of Au nanoparticles were investigated by transmission electron microscopy and X-ray diffraction. Energy levels of molecules were calculated by molecular orbital calculations, and the nanostructure and electronic properties were discussed. (c) 2014 Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.

DOI： 10.1016/j.pnsc.2014.04.002

Web of Science

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

Takeo Oku, Satoru Hori, Atsushi Suzuki, Tsuyoshi Akiyama, Yasuhiro Yamasaki

JAPANESE JOURNAL OF APPLIED PHYSICS 53 ( 5 ) 05FJ08-1 - 05FJ08-5 2014.5

Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

[6,6]-phenyl C-61-butyric acid methyl ester and poly(3-hexylthiophene) bulk heterojunction solar cells doped with silicon phthalocyanine (SiPc) were fabricated and characterized. The photovoltaic properties of the solar cells with an inverted structure were improved by the SiPc addition, which were investigated on the bases of current density-voltage characteristics, incident photon to current conversion efficiency, and internal quantum efficiency. The solar cell with the inverted structure also showed good stability in air compared with the normal stacking devices. The microstructure of the solar cells was investigated by X-ray diffraction and transmission electron microscopy, and the carrier separation and transfer of the solar cells were discussed. (C) 2014 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.53.05FJ08

Web of Science

Electronic structures and magnetic properties of Sc2YN@C-80(CF3)(2) dimer Reviewed

Atsushi Suzuki, Takeo Oku

JAPANESE JOURNAL OF APPLIED PHYSICS 53 ( 5 ) 05FN02 - 05FN05 2014.5

Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD

Electronic structures and magnetic properties of a Sc2YN@C-80(CF3)(2) dimer, a Sc3N@C-80(CF3)(2) dimer, and Sc2YN@C-80(CF3)(2) were investigated by quantum calculation using the density functional theory. The effect of the perturbation of dimerization on the electronic structure was based on the distorted molecular structure of the electron density distribution with an s,p, d-hybrid orbital at decreasing energy levels near the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO). Magnetic parameters of the isotropic chemical shifts of N-14, Sc-45, and C-13-NMR in N-14, Sc-45, and C-13 atoms on the fullerene cage were calculated. The chemical shifts of Sc-45 and N-14 atoms in a dimer were due to the dipole-dipole and nuclear quadrupole interactions generated by an electrostatic potential with a slight modified electron density distribution and an atomic charge around a nucleus. (C) 2014 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.53.05FN01

Web of Science

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Papers - SUZUKI Atsushi