期刊
ACS APPLIED ENERGY MATERIALS
卷 2, 期 4, 页码 2779-2785出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b00116
关键词
Cu2ZnSnS4 photocathode; Ag substitution; band positions; onset potential; solar water splitting
资金
- National Natural Science Foundation of China [51702087, 21673066, 21703054]
- Open Research Fund of Jiangsu Provincial Key Laboratory for Nanotechnology, Nanjing University
Ag-substituted Cu2ZnSnS4 (ACZTS) thin films were fabricated using a solution-processed method. The effects of Ag-substituted Cu sites on the crystallinity, band gap, band positions, and photoelectrochemical water splitting performance of Cu2ZnSnS4 (CZTS) were investigated. Compared to pure CZTS, the grain sizes and band gap of ACZTS are gradually increased as the Ag content increases. More importantly, the valence band maximum position of ACZTS is deeper than pure CZTS, which is beneficial to improve the onset potential. When the Ag/(Ag+Cu molar ratio is 30%, the highest photocurrent of Pt/CdS/ACZTS photocathode reaches 3.78 mA/cm(2) at 0 V-RHE and the most positive onset potential is 0.33 VRHE, which are much higher than those of pure CZTS. The study will deepen understanding of the band structure of Ag-substituted CZTS and its effect on the photoelectrochemical performance of CZTS.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据