The roles of defect states in photoelectric and photocatalytic processes for ZnxCd1-xS

被引：121

作者：

Shi, Jianying ^{[1
]}

Cui, Hua'nan ^{[1
]}

Liang, Zhenxing ^{[2
]}

Lu, Xihong ^{[1
]}

Tong, Yexiang ^{[1
]}

Su, Chengyong ^{[1
]}

Liu, Hong ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China

[2] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou, Guangdong, Peoples R China

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2011年 / 4卷 / 02期

基金：

美国国家科学基金会;

关键词：

H-2; PRODUCTION; SOLAR-CELLS; PHOTOLUMINESCENCE; LUMINESCENCE; PERFORMANCE; HYDROGEN; WATER; TIO2; CDS;

D O I：

10.1039/c0ee00309c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This work aims to investigate the role that defect states play in photoelectric and photocatalytic processes. Ternary ZnxCd1-xS with wurtzite structure is firstly synthesized, and then the defect is characterized by photoluminescence (PL) spectroscopy. It is found that the photoelectrons trapped in surface defect states exhibit different behavior in the processes of photoelectric transfer and photocatalytic hydrogen evolution. During the photocatalytic process, the surface defect states in ZnxCd1-xS act as the electron pool to improve the photocatalytic activity of water-splitting reaction. In comparison, the surface defect states serve as the recombination center that decreases the efficiency of photoelectric transfer. This finding is of great significance for the design of effective photoelectric and photocatalytic material in the field of solar energy conversion.

引用

页码：466 / 470

页数：5

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