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Fast interfacial charge separation in chemically hybridized CdS-PVK nanocomposites studied by photoluminescence and photoconductivity measurements

被引：42
作者：
Cheng, JX
Wang, SH
Li, XY
Yan, YJ
Yang, SH [1 ]
Yang, CL
Wang, JN
Ge, WK
机构：
[1] Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2001年 / 333卷 / 05期
关键词：
D O I：
10.1016/S0009-2614(00)01391-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Photoinduced charge transfer and separation in chemically hybridized CdS-PVK nanocomposites is investigated by steady-state and time-resolved photoluminescence as well as photoconductivity measurements. The chemically hybridized CdS-PVK composites display a longer luminescence lifetime than the pure CdS nanoparticles. At the same time, they show an enhanced photoconductivity as compared with PVK. It is also found that the chemically hybridized Cd-PVK nanocomposites exhibit a higher photoconductivity than the CdS/PVK nano-blends at the same molar ratio. The photoluminescence and photoconductivity results are explained by fast interfacial charge transfer between the Q-CdS and PVK. (C) 2001 Elsevier Science B.V. All rights reserved.
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收藏
页码：375 / 380
页数：6
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