Oxygen vacancies promoting photoelectrochemical performance of In2O3 nanocubes

被引：491

作者：

Gan, Jiayong ^{[1
]}

Lu, Xihong ^{[1
]}

Wu, Jingheng ^{[2
]}

Xie, Shilei ^{[1
]}

Zhai, Teng ^{[1
]}

Yu, Minghao ^{[1
]}

Zhang, Zishou ^{[3
]}

Mao, Yanchao ^{[1
]}

Wang, Shing Chi Ian ^{[4
]}

Shen, Yong ^{[2
]}

Tong, Yexiang ^{[1
]}

机构：

[1] Sun Yat Sen Univ, KLGHEI Environm & Energy Chem, MOE Key Lab Bioinorgan & Synthet Chem, Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China

[2] Sun Yat Sen Univ, Dept Theoret Chem & Computat Chem, Guangzhou 510275, Guangdong, Peoples R China

[3] Sun Yat Sen Univ, Sch Chem & Chem Engn, MOE Key Lab Polymer Composites & Funct Mat, Guangzhou 510275, Guangdong, Peoples R China

[4] Shenzhen Middle Sch, Shenzhen 518001, Peoples R China

来源：

SCIENTIFIC REPORTS | 2013年 / 3卷

关键词：

CONVERSION EFFICIENCY; OXIDE; TIO2; CRYSTALLINE; ENHANCEMENT; SCATTERING; GROWTH; CELLS; FILMS; NANOTUBES;

D O I：

10.1038/srep01021

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

This work reports a facile method for preparing the new photoactive In2O3 films as well as their implementation in photoelectrochemical (PEC) application. We firstly investigated the relationship between oxygen vacancies (V-O) and PEC performance and revealed a rule between them. We found that the optimized In2O3-n sample yielded a photocurrent density up to 3.83 mA/cm(2) in 1 M Na2SO4 solution under the solar illumination. It also gave efficiency as high as 75% over 400 nm in the incident-photon-to-current-conversion efficiency (IPCE) spectrum, which is the best value for an In2O3 photoanode reported. Moreover, the PEC performance of these films is enhanced as the V-O increased and then decreased with further increasing V-O. This two-side effect means V-O can favor the photoelectron activation, or act as recombination centers to prohibit the generation of photocurrent. Making highly photoactive In2O3 nanostructures in this work will open up new opportunities in various areas.

引用

页数：7

共 49 条

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