Search Results - "Nishimura, Takahito"

Impact of Urbach energy on open-circuit voltage deficit of thin-film solar cells by Chantana, Jakapan, Kawano, Yu, Nishimura, Takahito, Mavlonov, Abdurashid, Minemoto, Takashi

“…Correlation between Urbach energy (EU) and open-circuit voltage deficit (VOC,def) among conventional as well as emerging thin-film solar cells, i.e…”
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Effect of an Ohmic back contact on the stability of Cu(In,Ga)Se2-based flexible bifacial solar cells by Mavlonov, Abdurashid, Nishimura, Takahito, Chantana, Jakapan, Kawano, Yu, Minemoto, Takashi

“…In this work, the influence of the Ohmic-contact behavior at the absorber/transparent back-contact interface on the stability of flexible bifacial Cu(In,Ga)Se2…”
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Investigation of carrier recombination of Na-doped Cu2SnS3 solar cell for its improved conversion efficiency of 5.1 by Chantana, Jakapan, Tai, Kanta, Hayashi, Haruki, Nishimura, Takahito, Kawano, Yu, Minemoto, Takashi

“…Na-doped Cu2SnS3 (CTS) solar cells are fabricated and their carrier recombination is examined. The CTS absorbers on Mo-coated soda-lime glass substrates are…”
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Effect of Cu‐deficient layer formation in Cu(In,Ga)Se2 solar‐cell performance by Nishimura, Takahito, Toki, Soma, Sugiura, Hiroki, Nakada, Kazuyoshi, Yamada, Akira

“…Cu‐deficient layer (CDL) on Cu(In,Ga)Se2 (CIGS) promotes Cd diffusion from CdS buffer layer and forms a valence band offset (ΔEV) between CDL and CIGS. We…”
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Growth of Zn‐Ge‐O Thin‐Film as a Transparent Conductive Oxide Buffer Material for Chalcopyrite Solar Cell by Egyna, Dwinanri, Ito, Satoru, Nishimura, Takahito, Yamada, Akira

“…The importance of positive band offset at the p–n interface of heterojunction thin‐film solar cells has been underlined in the authors' previous work on…”
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Accurate control and characterization of Cu depletion layer for highly efficient Cu(In,Ga)Se2 solar cells by Nishimura, Takahito, Sugiura, Hiroki, Nakada, Kazuyoshi, Yamada, Akira

“…The unintentional formation of a Cu depletion layer (CDL) on the surface of Cu(In,Ga)Se2 was observed in 1993, and CDLs have been expected to improve the…”
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Transparent Electrode and Buffer Layer Combination for Reducing Carrier Recombination and Optical Loss Realizing over a 22%-Efficient Cd-Free Alkaline-Treated Cu(In,Ga)(S,Se)2 Solar Cell by the All-Dry Process by Chantana, Jakapan, Kawano, Yu, Nishimura, Takahito, Kimoto, Yoshinori, Kato, Takuya, Sugimoto, Hiroki, Minemoto, Takashi

“…The structures of K or Cs alkaline-treated Cu­(In,Ga)­(S,Se)2 (CIGSSe) solar cells are developed, and their carrier recombination rates are scrutinized. It is…”
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Aging Effect of a Cu(In,Ga)(S,Se)2 Absorber on the Photovoltaic Performance of Its Cd‐Free Solar Cell Fabricated by an All‐Dry Process: Its Carrier Recombination Analysis by Chantana, Jakapan, Nishimura, Takahito, Kawano, Yu, Suyama, Naoki, Yamada, Akira, Kimoto, Yoshinori, Kato, Takuya, Sugimoto, Hiroki, Minemoto, Takashi

“…Cd‐free Cu(In,Ga)(S,Se)2 (CIGSSe) solar cells are fabricated by an all‐dry process (a Cd‐free and all‐dry process CIGSSe solar cell) with aged CIGSSe thin film…”
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Interfacial modification mechanism by aging effect for high-performance Cd-free and all-dry process Cu(In,Ga)(S,Se)2 solar cells by Nishimura, Takahito, Chantana, Jakapan, Kawano, Yu, Yamada, Akira, Kimoto, Yoshinori, Kato, Takuya, Sugimoto, Hiroki, Minemoto, Takashi

“…Modification of the hetero-junction interface in Cd-free and all-dry process Cu(In,Ga)(S,Se)2 (CIGSSe) solar cells by introducing the aging process for the…”
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Application of Al-Doped (Zn, Mg)O on pure-sulfide Cu(In, Ga)S2 solar cells for enhancement of open-circuit voltage by Nishimura, Takahito, Kim, Shinho, Chantana, Jakapan, Kawano, Yu, Ishizuka, Shogo, Minemoto, Takashi

“…In this study, interfacial recombination observed by activation energy (Ea) is reduced with an improvement in the built-in potential (Vbi) by raising the…”
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Tunable‐Conduction‐Band In–Zn–O‐Based Transparent Conductive Oxide Deposited at Room Temperature by Ishida, Taichi, Nishimura, Takahito, Chantana, Jakapan, Mavlonov, Abdurashid, Kawano, Yu, Negami, Takayuki, Minemoto, Takashi

“…Aluminum (Al)‐doped indium zinc magnesium oxide (Al:IZMO)‐based transparent conductive oxide (TCO) films with a tunable conduction band structure are developed…”
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P‐Type Nb‐Doped MoS2 Layer for Solar Cell Application by Nishimura, Takahito, Nakaji, Kento, Chantana, Jakapan, Mavlonov, Abdurashid, Kawano, Yu, Negami, Takayuki, Minemoto, Takashi

“…Herein, under a H2S/Ar ambient, a p+‐type Nb‐doped MoS2 (MoS2:Nb) film is developed via a sulfurization for a cosputtered Mo–Nb metal precursor to be applied…”
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Zn1−xMgxO second buffer layer of Cu2Sn1−xGexS3 thin-film solar cell for minimizing carrier recombination and open-circuit voltage deficit by Hayashi, Haruki, Chantana, Jakapan, Kawano, Yu, Nishimura, Takahito, Mavlonov, Abdurashid, Minemoto, Takashi

“…•Cu2Sn1−xGexS3 (CTGS) solar cells are fabricated.•Zn1−xMgxO (ZMO) was applied as second buffer layer.•Eg of ZMO is increased to 3.55 eV, yielding improved…”
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Device design for high-performance bifacial Cu(In,Ga)Se2 solar cells under front and rear illuminations by Nishimura, Takahito, Chantana, Jakapan, Mavlonov, Abdurashid, Kawano, Yu, Masuda, Taizo, Minemoto, Takashi

“…•Device design is theoretically performed for bifacial Cu(In,Ga)Se2 solar cells.•Bandgap grading in Cu(In,Ga)Se2 layer improves performance under rear…”
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Back-contact barrier analysis to develop flexible and bifacial Cu(In,Ga)Se2 solar cells using transparent conductive In2O3: SnO2 thin films by Mavlonov, Abdurashid, Nishimura, Takahito, Chantana, Jakapan, Kawano, Yu, Masuda, Taizo, Minemoto, Takashi

“…•The lift-off process enable detailed investigation of the CIGS/Mo interface.•The majority barrier height of 131 meV caused by MoSe2 layer at the CIGS/Mo…”
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Accurate estimation of outdoor performance of photovoltaic module through spectral mismatch correction factor under wide range of solar spectrum by Takeguchi, Kota, Chantana, Jakapan, Nakayama, Koichi, Kawano, Yu, Nishimura, Takahito, Hishikawa, Yoshihiro, Minemoto, Takashi

“…Spectral mismatch correction factor (MM) is determined by average photon energy (APE). APE based on wide solar spectral ranges leads to better description of…”
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Investigation of near-surface material composition of Cu(In,Ga)Se2 film after air exposure and chemical etching for its Cd-free solar cell by Teraji, Seiki, Chantana, Jakapan, Kawano, Yu, Nishimura, Takahito, Minemoto, Takashi

“…Cd-free Cu(In,Ga)Se2 (CIGS) solar cells were fabricated with the structure of soda lime glass/Mo/CIGS/(Zn,Mg)O/In2O3:Sn. The Zn doped into CIGS surface called…”
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Examination of a Cu-Deficient Layer on Cu(In, Ga)Se2 Films Fabricated by a Three-Stage Process for Highly Efficient Solar Cells by Nishimura, Takahito, Nakada, Kazuyoshi, Yamada, Akira

“…The carrier recombination at a heterointerface between an n-type CdS buffer and a p-type Cu­(In, Ga)­Se2 (CIGS) absorber in CIGS solar cells can be suppressed…”
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Application of Two-Dimensional MoSe2 Atomic Layers to the Lift-Off Process for Producing Light-Weight and Flexible Bifacial Cu(In, Ga)Se2 Solar Cells by Nishimura, Takahito, Hamada, Naoto, Chantana, Jakapan, Mavlonov, Abdurashid, Kawano, Yu, Masuda, Taizo, Minemoto, Takashi

“…The application of two-dimensional MoSe2 atomic layers to the lift-off process is proposed for the preparation of light-weight and flexible bifacial Cu­(In,…”
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Improvement of Cu(In, Ga)Se2 photovoltaic performance by adding Cu-poor compounds Cu(In, Ga)3Se5 at Cu(In, Ga)Se2/CdS interface by Toki, Soma, Nishimura, Takahito, Sugiura, Hiroki, Nakada, Kazuyoshi, Yamada, Akira

“…We report on the improvement of Cu(In, Ga)Se 2 (CIGS) photovoltaic performance by inserting Cu-poor compounds Cu(In, Ga) 3 Se 5 at CIGS/CdS interface. It was…”
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