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DOI	10.1039/c8ee01783b
	Development of highly efficient CuIn0.5Ga0.5Se2-based photocathode and application to overall solar driven water splitting
	Kobayashi H.; Sato N.; Orita M.; Kuang Y.; Kaneko H.; Minegishi T.; Yamada T.; Domen K.
发表日期	2018
ISSN	17545692
起始页码	3003
结束页码	3009
卷号	11 期号:10
英文摘要	A CuIn1-xGaxSe2 (CIGS) photocathode having a specific composition exhibited remarkable promotion of hydrogen evolution from water, with a half-cell solar-to-hydrogen conversion efficiency of 12.5%. CIGS thin films with various compositions (defined by x = Ga/(In + Ga)) were prepared via a three-stage method employing a vacuum evaporation system. The photocurrent from CIGS photocathode surfaces modified with CdS and Pt (Pt/CdS/CIGS) significantly increased along with x as a result of a reduction in the conduction band offset at the CIGS/CdS interface. Using an optimized aqueous electrolyte resulted in enhanced photocurrents of 28 and 18 mA cm-2 at 0 and 0.6 VRHE, respectively, under simulated AM1.5G sunlight. A tandem-type PEC cell containing the newly developed CIGS photocathode and a BiVO4 semi-transparent photoanode demonstrated stoichiometric hydrogen and oxygen evolution with a solar-to-hydrogen conversion efficiency of 3.7% without the application of an external bias voltage. © 2018 The Royal Society of Chemistry.
英文关键词	Bismuth compounds; Cadmium sulfide; Conversion efficiency; Copper alloys; Efficiency; Electrolytes; Gallium alloys; Hydrogen; II-VI semiconductors; Indium alloys; Photocathodes; Semiconductor alloys; Vacuum evaporation; Aqueous electrolyte; Conduction band offset; Hydrogen evolution; Oxygen evolution; Photocathode surfaces; Semi-transparent; Solar-to-hydrogen conversions; Three-stage method; Solar power generation; efficiency measurement; electrode; electrolyte; evaporation; fuel cell; hydrogen; inorganic compound; reduction; solar power
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190106
作者单位	Department of Chemical System Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan; Frontier Core-Technology Laboratory, FujiFilm Corporation, 577 Ushijima, Kaisei-Machi, Ashigarakami-gun, Kanagawa, 258-8577, Japan; Japan Technological Research Association of Artificial Photosynthetic Chemical Process (ARPChem), 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan; PRESTO-JST, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
推荐引用方式 GB/T 7714	Kobayashi H.,Sato N.,Orita M.,et al. Development of highly efficient CuIn0.5Ga0.5Se2-based photocathode and application to overall solar driven water splitting[J],2018,11(10).
APA	Kobayashi H..,Sato N..,Orita M..,Kuang Y..,Kaneko H..,...&Domen K..(2018).Development of highly efficient CuIn0.5Ga0.5Se2-based photocathode and application to overall solar driven water splitting.Energy & Environmental Science,11(10).
MLA	Kobayashi H.,et al."Development of highly efficient CuIn0.5Ga0.5Se2-based photocathode and application to overall solar driven water splitting".Energy & Environmental Science 11.10(2018).