Enhanced Photocurrents with ZnS Passivated Cu(ln,Ga)(Se,S)2 Photocathodes Synthesized Using a Nonvacuum Process for Solar Water Splitting

被引：75

作者：

Chae, Sang Youn ^{[1
,2
]}

Park, Se Jin ^{[1
,3
]}

Han, Sung Gyu ^{[1
,4
]}

Jung, Hyejin ^{[1
,5
]}

Kim, Chae-Woong ^{[6
]}

Jeong, Chaehwan ^{[6
]}

Joo, Oh-Shim ^{[1
]}

Min, Byoung Koun ^{[1
,5
,7
]}

Hwang, Yun Jeong ^{[1
,5
]}

机构：

[1] Korea Inst Sci & Technol, Clean Energy Res Ctr, Seoul 02792, South Korea

[2] Korea Univ, Dept Chem, Coll Sci, Seoul 02841, South Korea

[3] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea

[4] Korea Univ, Coll Sci, Dept Phys, Seoul 02841, South Korea

[5] Korea Univ Sci & Technol, Daejeon 34113, South Korea

[6] Korea Inst Ind Technol, Seonam Reg Div, Appl Opt & Energy R&D Grp, Gwangju 61012, South Korea

[7] Korea Univ, Green Sch, 145 Anam Ro, Seoul 02841, South Korea

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2016年 / 138卷 / 48期

基金：

新加坡国家研究基金会;

关键词：

SURFACE MODIFICATION; HYDROGEN EVOLUTION; BIVO4; PHOTOANODES; THIN-FILMS; EFFICIENT; LAYER; CDS; DRIVEN; CELLS; NANOPARTICLES;

D O I：

10.1021/jacs.6b09595

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Chalcopyrite Cu(In,Ga)(Se,S)(2) (CIGS) semiconductors are potential candidates for use in photoelectrochemical (PEC) hydrogen generation due to their excellent optical absorption properties and high conduction band edge position. In the present research, CIGS thin film was successfully prepared on a transparent substrate (F:SnO2 glass) using a solution-based process and applied for a photocathode in solar water splitting, which shows control of the surface state associated with sulfurization/selenization process significantly influences on the PEC activity. A ZnS passivation surface layer was introduced, which effectively suppresses charge recombination by surface states of CIGS. The CIGS/ZnS/Pt photocathode exhibited highly enhanced PEC activity (similar to 24 mA.cm(-2) at -0.3 V vs RHE). The performances of our CIGS photocathode on the transparent substrate were also characterized under front/back light illumination, and the incident photon to current conversion efficiency (IPCE) drastically changed depending on the illumination directions showing decreased IPCE especially under UV region with back illumination. The slow minority carrier (electron) transportation is suggested as a limiting factor for the PEC activity of the CIGS photocathode.

引用

页码：15673 / 15681

页数：9

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