Faculty Profiles - SUZUKI Atsushi

Papers - SUZUKI Atsushi

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Fabrication and Characterization of Perovskite Solar Cells added with Zinc Phthalocyanine to Active Layer Reviewed

Atsushi Suzuki, Yuto Hayashi, Yasuhiro Yamasaki, Takeo Oku

AIP Conference Proceedings 2067 020010-1 - 6 2019.1

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

Hayato Machiba, Takeo Oku, Atsushi Suzuki

AIP Conference Proceedings 2067 020009-1 - 7 2019.1

Effectsof TiO2 nanoparticleswithdifferent sizes on the performance of CH3NH3PbI3-xClx solar cells Reviewed

Naoki Ueoka, Takeo Oku, Atsushi Suzuki, Hiroki Sakamoto, Masahiro Yamada, Satoshi Minami, Masanobu Okita

AIP Conference Proceedings 2067 020001-1 - 10 2019.1

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

Masaya Taguchi, Atsushi Suzuki, Naoki Ueoka, Takeo Oku

AIP Conference Proceedings 2067 020018-1 - 8 2019.1

Effects of Decaphenylcyclopentasilane Addition on Photovoltaic Properties of Perovskite Solar Cell Reviewed International journal

Masaya Taguchi, Atsushi Suzuki, Takeo Oku, Sakiko Fukunishi, Satoshi Minami, Masanobu Okita

Coatings 8 461 2018.12

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

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

Coatings 8 ( 12 ) 2018.12

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

© 2018 by the authors. Perovskite solar cells, in which decaphenylcyclopentasilane (DPPS) layers were formed on the surface of the perovskite layer, were fabricated, and the influence on photovoltaic characteristics was investigated. The devices were fabricated by a spin-coating technique, and the surface morphology and crystal structures were investigated by scanning electron microscopy and X-ray diffraction. By adding the DPPS, the fill factor and open circuit voltage were increased, and the photoelectric conversion efficiency was improved. A stability test in ambient air was carried out for seven weeks, and the photoelectric conversion efficiencies were remarkably improved for the devices with DPPS.

DOI： 10.3390/COATINGS8120461

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85068893304&origin=inward

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

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

Coatings 8 ( 12 ) 461 2018.12

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

DOI： 10.3390/COATINGS8120461

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

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

Coatings 8 ( 12 ) 2018.12

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

DOI： 10.3390/COATINGS8120461

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

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85052123274&origin=inward

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

DOI： 10.1016/j.heliyon.2018.e00755

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

Masaya Taguchi, Atsushi Suzuki, Hiroki Tanaka, Takeo Oku

AIP Conference Proceedings 1929 ( 020012 ) 1 - 8 2018.1

Language：English Publishing type：Research paper (international conference proceedings) Publisher：American Institute of Physics Inc.

Perovskite-type CH3NH3PbI3-based photovoltaic devices were fabricated and characterized. Effects of manganese (Mn), yttrium (Y) compounds addition into the perovskite crystal on the photovoltaic properties were investigated. Also, the effects of poly(methyl methacrylate) (PMMA) addition on perovskite layer on the photovoltaic properties were investigated. When 3 % MnCl2 was added, the short circuit current density and conversion efficiency were improved by promoting the crystal growth of perovskite phase. The photoelectric conversion efficiency for 0.9 mg mL-1 PMMA added was 7.36 %. Open circuit voltage and fill factor were improved by 5 % YCl3 addition.

DOI： 10.1063/1.5021925

Scopus

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

Yuji Ando, Yuya Ohishi, Kohei Suzuki, Atsushi Suzuki, Takeo Oku

AIP Conference Proceedings 1929 ( 020003 ) 1 - 8 2018.1

Language：English Publishing type：Research paper (international conference proceedings) Publisher：American Institute of Physics Inc.

The crystal structures of perovskite thin films including CH3NH3PbI3, CH3NH3Pb1-xSbxI3, and CH3NH3PbI3-yCly in the solar cell configuration were studied by using Rietveld refinement. For the CH3NH3PbI3 and CH3NH3Pb1-xSbxI3 samples, satisfactory agreement with the measured profiles was obtained with a weighted profile R-factor (Rwp) of as low as 3%. It was shown that the site occupancy of methylammonium (MA) was decreased in the antimonized cell due to the compensation effect of an increased positive charge brought about by replacing Pb2+ with Sb3+. Photovoltaic measurements showed that the power conversion efficiency was enhanced by adding a small amount of Sb to the CH3NH3PbI3 cell, but it was monotonically decreased as the mole fraction of Sb exceeded 0.03. This variation of the conversion efficiency was considered as a result of suppressed crystallization of PbI2 and carrier recombination via MA vacancies in the antimonized cells. In the case of CH3NH3PbI2.88Cl0.12 sample, the agreement with the measured profile with an Rwp of as high as 7% suggested the co-existence of cubic and tetragonal phases in the chlorinated cell.

DOI： 10.1063/1.5021916

Scopus

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

Atsutaka Yamada, Daisuke Izumoto, Tsuyoshi Akiyama, Katsuhiko Fujita, Atsushi Suzuki, Takeo Oku

AIP Conference Proceedings 1929 ( 020020 ) 1 - 5 2018.1

Language：English Publishing type：Research paper (international conference proceedings) Publisher：American Institute of Physics Inc.

C60-ethylanediamine adduct particle (C60P) were prepared by simply mixing of C60 and ethylenediamine (EDA) in toluene. C60P was dissolved into EDA to obtain C60P-EDA. C60P-EDA can be diluted by ethanol, 2-methoxyethanol or water. Thin films of C60P-EDA were prepared from these diluted solutions of C60P-EDA by spin-coating. Such thin-films were used as a part of organic thin-film solar cells.

DOI： 10.1063/1.5021933

Scopus

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

Masataka Kato, Atsushi Suzuki, Yuya Ohishi, Hiroki Tanaka, Takeo Oku

AIP Conference Proceedings 1929 ( 020015 ) 1 - 7 2018.1

Language：English Publishing type：Research paper (international conference proceedings) Publisher：American Institute of Physics Inc.

Fabrication and characterization of perovskite solar cells using mesoporous TiO2 as an electron transporting layer and 2,2',7,7'-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9'-spirobifluorene as a hole-transporting layer were performed for improving the photovoltaic performance. Additive effects of formamidinium (FA), rubidium (Rb), chlorine (Cl) and bromine (Br) into the methylammonium-lead-halide perovskite crystal on the photovoltaic properties and microstructures were investigated. The photovoltaic parameters of short-circuit current density, conversion efficiency, the surface morphology and domain in the perovskite crystal were characterized. The slight addition of FACl and RbBr to the CH3NH3PbI3 crystal provided homogeneous microstructures with the dispersed crystal domains, which improved the photovoltaic performance. The excess addition of Cl to the perovskite crystal caused nanorod-like crystals, which degraded the photovoltaic performance.

DOI： 10.1063/1.5021928

Scopus

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

Naoki Ueoka, Takeo Oku, Yuya Ohishi, Hiroki Tanaka, Atsushi Suzuki, Hiroki Sakamoto, Masahiro Yamada, Satoshi Minami, Shinichiro Tsukada

AIP Conference Proceedings 1929 ( 020026 ) 1 - 8 2018.1

Language：English Publishing type：Research paper (international conference proceedings) Publisher：American Institute of Physics Inc.

Perovskite-type photovoltaic devices were prepared by a spin-coating method using a precursor solution of CH3NH3I and lead(II) chloride in N,N-dimethylformamide. Effects of cesium bromide (CsBr) addition on the photovoltaic properties and microstructures of the perovskite phase were investigated. The fill factor was increased by adding the CsBr to the CH3NH3PbI3-xClx precursor solution, which resulted in increase of the conversion efficiency. The crystallinity of the CH3NH3PbI3-xClx perovskite phase was also improved by adding the CsBr to the H3NH3PbI3-xClx precursor solution.

DOI： 10.1063/1.5021939

Scopus

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

Masaya Taguchi, Atsushi Suzuki, Hiroki Tanaka, and Takeo Oku

AIP Conference Proceedings 1929 ( 020012 ) 1 - 8 2018.1

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

22) Atsutaka Yamada, Daisuke Izumoto, Tsuyoshi Akiyama, Katsuhiko Fujita, Atsushi Suzuki, Takeo Oku

AIP Conference Proceedings 1929 ( 020020 ) 1 - 5 2018.1

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

Yuji Ando, Yuya Ohishi, Kohei Suzuki, Atsushi Suzuki, Takeo Oku

AIP Conference Proceedings 1929 ( 020003 ) 1 - 8 2018.1

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

20) Naoki Ueoka, Takeo Oku, Yuya Ohishi, Hiroki Tanaka, Atsushi Suzuki, Hiroki Sakamoto, Masahiro Yamada, Satoshi Minami, and Shinichiro Tsukada

AIP Conference Proceedings 1929 ( 020026 ) 1 - 8 2018.1

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

Masataka Kato, Atsushi Suzuki, Yuya Ohishi, Hiroki Tanaka, and Takeo Oku

AIP Conference Proceedings 1929 ( 020015 ) 1 - 7 2018.1

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Papers - SUZUKI Atsushi