標題: Modulation and Improvement on Separation of Photoinduced Charge Carriers in CdS-Metal Nanoheterostructures
作者: Cheng, Wei-Yun
Chen, Wei-Ta
Hsu, Yung-Jung
Lu, Shih-Yuan
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 8-Oct-2009
摘要: We demonstrate the feasibility of modulating and improving the separation of photoinduced charge carriers of CdS-M nanoheterostructures through partial replacement of S with two group 16 elements of larger atomic size, Se and Te. With the incorporation of Se or Te into the US nanowires (NWs), the defect states of the US NWs were effectively passivated, enabling a fuller extent of participation of the photoinduced electrons in the charge separation process, thus resulting in a more pronounced photoluminescence quenching and photocurrent depression for the CdS(1-x)Se(x) and CdS(1-x)Te(x) NWs. The present study provides a facile way of improving the photocatalytic efficiency of US through the improvement in retarding the recombination of photoinduced charge carriers.
URI: http://dx.doi.org/10.1021/jp905519e
http://hdl.handle.net/11536/6571
ISSN: 1932-7447
DOI: 10.1021/jp905519e
期刊: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 113
Issue: 40
起始頁: 17342
結束頁: 17346
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