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Progress in Natural Science:Materials International 2014年第3期24卷 179-183页

作者： Akihiko Nagata takeo oku Tsuyoshi Akiyama Atsushi Suzuki Department of Materials Science The University of Shiga Prefecture

Organic solar cells based on copper naphthalocyanine(CuNc) and fullerene(C60) were fabricated, and their photovoltaic properties were investigated. C60 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 was improved after blending the Au nanoparticles into the hole transport layer. Nanostructures 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.& 2014 Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.

关键词： Solar cell Copper naphthalocyanine Fullerene Au nanoparticle

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

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Progress in Natural Science:Materials International 2011年第2期21卷 122-126页

作者： takeo oku Nariaki KAKUTA Kengo KOBAYASHI Atsushi SUZUKI Kenji KIKUCHI Department of Materials Science The University of Shiga PrefectureShiga 522-8533Japan

Dye-sensitized solar cells TiO2with were *** phase composition and microstructures of the solar cells were examined by X-ray diffractometry and transmission electron microscopy,and the energy levels of the present solar cells were also *** results show that a solar cell mixed with xylenol orange and rose Bengal shows a higher conversion efficiency compared to solar cells with a single *** introduction of amorphous TiO2layers results in an improvement of the conversion efficiency.

关键词： solar cell TiO2 dye porphyrin microstructure

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

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Progress in Natural Science:Materials International 2010年第1期20卷 38-43页

作者： Akihiko NAGATA takeo oku Kenji KIKUCHI Atsushi SUZUKI Yasuhiro YAMASAKI Eiji OSAWA Department of Materials Science The University of Shiga Prefecture Orient Chemical industries Co.Ltd. Department of New Business8-1 Sanra-Higashi-MachiNeyagawaOsaka572-8581Japan 3. NanoCarbon Research Institute Ltd.3-15-1 TokidaUedaNagano386-8567Japan

Nanodiamond-based solar cells were fabricated and the photovoltaic properties were ***(C60)and fullerenol(C60(OH)10-12)were used as n-type semiconductors,and diamond nanoparticles and metal phthalocyanine derivative were used as p-type *** nanostructures of the solar cells were investigated by transmission electron microscopy and X-ray diffracometry,and the electronic property was discussed.

关键词： solar cell nanodiamond C60 phthalocyanine

Formation and characterization of phthalocyanine dimer/C60 solar cells

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Progress in Natural Science:Materials International 2011年第1期21卷 27-30页

作者： Akihiro TAKEDA Akira MINOWA takeo oku Atsushi SUZUKI Kenji KIKUCHI Yasuhiro YAMASAKI Department of Materials Science The University of Shiga Prefecture2500HassakaHikoneShiga 522-8533Japan Orient Chemical Industries Co.Ltd.Department of New Business8-1Sanra-Higashi-MachiNeyagawaOsaka 572-8581Japan

Organic solar cells withμ-oxo-bridged gallium phthalocyanine dimer(GaPc dimer) and fullerene were produced by an evaporation method.A device based on the GaPc dimer provided a conversion efficiency of 4.2×10-3%,which is better compared to a device based on phthalocyanine *** effect was discussed with a molecular orbital calculation,and the crystalline phases of the present solar cells were investigated by X-ray *** improvement of the efficiency was discussed on the basis of the experimental results.

关键词： phthalocyanine dimmer fullerene solar cell

Fabrication of Perovskite-Type Photovoltaic Devices with Polysilane Hole Transport Layers

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Materials Sciences and Applications 2017年第2期8卷 209-222页

作者： Yasuhiro Shirahata takeo oku Sakiko Fukunishi Kazufumi Kohno Department of Materials Science the University of Shiga Prefecture Shiga Japan Frontier Materials Laboratories Osaka Gas Chemicals Co. Ltd. Osaka Japan

Perovskite-type photovoltaic devices with polysilane hole transport layers were fabricated by a spin-coating method. In the present work, poly(methyl phenylsilane) (PMPS) and decaphenylcyclopentasilane (DPPS) were used as the hole transport layers. First, structural and optical properties of the PMPS and DPPS films were investigated, and the as-prepared PMPS and DPPS films were amorphous. Optical absorption spectra of the amorphous PMPS and DPPS showed some marked features due to the nature of polysilanes. Then, microstructures, optical and photovoltaic properties of the perovskite-type photovoltaic devices with polysilane hole transport layers were investigated. Current density-voltage characteristics and incident photon to current conversion efficiency of the photovoltaic devices with the polysilane layers showed different photovoltaic performance each other, attributed to molecular structures of the polysilanes and Si content in the present hole transport layers.

关键词： Polysilane Hole Transport Layer Perovskite Photovoltaic Device

Fabrication and Characterization of Phthalocyanine-Based Organic Solar Cells

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Materials Sciences and Applications 2014年第5期5卷 278-284页

作者： Makoto Iwase Atsushi Suzuki Tsuyoshi Akiyama takeo oku Department of Materials Science The University of Shiga Prefecture Shiga Japan

Organic solar cells using poly (copper phthalocyanine), copper tetrakis (4-cumylphenoxy) phthalocyanine, copper phthalocyanine and titanyl phthalocyanine were fabricated and characterized. Photovoltaic properties of the solar cells with inverted structures were investigated by optical absorption, current density-voltage characteristic and incident photon to current conversion efficiency. These phthalocyanines absorbed light with wavelength longer than 500 nm. A carrier transport mechanism is proposed based on the energy level diagram.

关键词： Organic Solar Cells Phthalocyanine Copper Poly Phthalocyanine

Fabrication and Characterization of Bulk Heterojunction Solar Cells Based on Liquid-Crystal Semiconductive Polymer

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Energy and Power Engineering 2012年第6期4卷 459-464页

作者： Atsushi Suzuki Shinichi Ogahara Tsuyoshi Akiyama takeo oku Department of Materials Science The University of Shiga Prefecture Hikone Japan

Bulk heterojunction solar cells based on poly poly(9,9-dioctylfluorene-co-bithiophene) (F8T2) as liquid crystal semiconductive polymer and C60 as electron acceptor were fabricated and characterized. Thermal treatment of the bulk heterojunction films at annealing in the range of glass temperature and liquid crystal transition was performed for tuning optimization with improving the photovoltaic and optical properties. The photovoltaic performance was depended on morphological behavior in active layer at crystal state below glass temperature. The F8T2 thin film worked for electron-donor layer as p-type semiconductor to support charge transfer in active layer. Mechanisms of the photovoltaic properties were discussed on the basis of experimental results.

关键词： Liquid Crystal Polymer Bulk Heterojunction Solar Cell Photovoltaic Property Optical Property

Theoretical Study of Gallium Phthalocyanine Dimer-Fullerene Complex for Photovoltaic Device

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Journal of Modern Physics 2011年第9期2卷 966-969页

作者： Akihiro Takeda takeo oku Atsushi Suzuki Yasuhiro Yamasaki 不详

Geometry and electronic structures of gallium phthalocyanine dimer and fullerene molecules were investigated by theoretical calculation. The highest occupied molecular orbital was localized on the donor site, and the lowest unoccupied molecular orbital were localized on accepter site. The present results indicate that high conversion efficiency would be expected when phthalocyanine dimers were used as solar cell materials.

关键词： Phthalocyanine Dimer Fullerene Solar Cell

Arsenic and Chlorine Co-Doping to CH3NH3PbI3Perovskite Solar Cells

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Advances in Materials Physics and Chemistry 2017年第1期7卷 1-10页

作者： Tsuyoshi Hamatani Yasuhiro Shirahata Yuya Ohishi Misaki Fukaya takeo oku Department of Materials Science The University of Shiga Prefecture Hikone Japan

Arsenic (As) and chlorine (Cl) were co-doped to CH3NH3PbI3 perovskite solar cells, and the photovoltaic properties were investigated. AsI3 and NH4Cl were added to perovskite precursor solution, which were deposited on mesoporous TiO2 by a spin-coating combining an air flow method. Current density-voltage characteristics and incident photon-to-current conversion efficiencies were improved by the co-doping of As and Cl to the perovskite phase, which also indicated an energy gap of 1.57 eV. X-ray diffraction showed suppression of PbI2 formation by the AsI3 addition. The structure analysis by scanning electron microscopy indicated formation of a homogeneous microstructure by adding AsI3 with NH4Cl, which would result in the improvement of the photovoltaic properties.

关键词： Perovskite Arsenic Solar Cell NH4Cl Chlorine

Fabrication and Characterization of PCBM:P3HT Bulk Heterojunction Solar Cells Doped with Germanium Phthalocyanine or Germanium Naphthalocyanine

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Materials Sciences and Applications 2013年第4期4卷 1-5页

作者： Kazumi Yoshida takeo oku Atsushi Suzuki Tsuyoshi Akiyama Yasuhiro Yamasaki Department of Materials Science The University of Shiga Prefecture Shiga Japan Department of New Business Orient Chemi- cal Industries Co. Ltd. Osaka Japan

[6,6]-phenyl C61-butyric acid methyl ester: poly (3-hexylthiophene) bulk heterojunction solar cells doped with germanium phthalocyanine or germanium naphthalocyanine were fabricated and characterized. Photovoltaic properties of the solar cells with inverted structures were investigated by optical absorption, current density-voltage characteristic and incident photon to current conversion efficiency. These germanium phthalocyanine and germanium naphthalocyanine blended as the third component absorbed light with wavelength longer than 700 nm. Morphology of solar cells was investigated by atomic force microscopy, and energy levels of the solar cells were discussed for power conversion efficiency.

关键词： Organic Solar Cell Inverted Structure Phthalocyanine Germanium P3HT PCBM