TiO2-Loaded WO3 Composite Films for Enhancement of Photocurrent Density

Wen-Gui Wang; Li Zhu; Yu-Yan Weng; Wen Dong

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TiO2-Loaded WO3 Composite Films for Enhancement of Photocurrent Density

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Titanium dioxide (TiO2) loaded tungsten trioxide (WO3) composite films are prepared by an E-beam vapor system.Associated with the existence of a heterojunction at the interface of TiO2 and WOa,the prepared TiO2-WO3 composite film shows enhanced photocurrent density,four times than the pure WO3 film illuminated under xenon lamp,and higher incident-photon-to-current conversion effciency.By varying the initiM TiO2 film thickness,such composite structures could be optimized to obtain the highest photocurrent density.We believe that thin TiO2 films improve the light response and increase the surface roughness of WO3 films.Furthermore,the existence of the heterojunction results in the efficient charge carriers' separation,transfer process,and a lower recombination of electron-hole pairs,which is beneficial for the enhancement of photocurrent density.

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《中国物理快报：英文版》 |2017年第2期|112-116|共5页
作者
Wen-Gui Wang; Li Zhu; Yu-Yan Weng; Wen Dong;
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College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006;

College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006;

College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006;

College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006;

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TiO2-Loaded WO3 Composite Films for Enhancement of Photocurrent Density

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