Earth-abundant trigonal BaCu2Sn(SexS1-x)4(x=0-0.55) thin films with tunable band gaps for solar water splitting

被引：32

作者：

Ge, Jie ^{[1
]}

Yu, Yue

Yan, Yanfa ^{[1
]}

机构：

[1] Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2016年 / 4卷 / 48期

基金：

美国国家科学基金会;

关键词：

CHALCOGENIDE PEROVSKITES; PHOTOCATHODE MATERIAL; HYDROGEN-PRODUCTION; VISIBLE-LIGHT; PERFORMANCE; CELLS; EFFICIENT; REDUCTION; SRCU2MS4; CUBI2O4;

D O I：

10.1039/c6ta06702f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photoelectrochemical (PEC) solar devices can convert abundant solar energy directly into storable, clean hydrogen fuel. Here, earth-abundant thin-film solid solutions, BaCu2Sn(SexS1-x)(4) (x = 0-0.55), demonstrated promise as low-cost absorber materials in efficient PEC solar devices. These p-type compounds crystallize in a trigonal structure and exhibit tunable band gaps of 1.67-2.05 eV for the composition x = Se/(Se + S). The photocathode based on the pure sulfide (x = 0) shows a photocurrent of similar to 5 mA cm(-2) saturated at -0.35 V vs. reversible hydrogen electrode (RHE) from a neutral electrolyte. Adding selenium decreases alloy band gaps and extends the absorption range of the solar spectrum, which increases the saturated photocurrent to similar to 11 mA cm(-2) at -0.55 V vs. RHE.

引用

收藏

页码：18885 / 18891

页数：7

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