Fast interfacial charge separation in chemically hybridized CdS-PVK nanocomposites studied by photoluminescence and photoconductivity measurements
2001; Elsevier BV; Volume: 333; Issue: 5 Linguagem: Inglês
10.1016/s0009-2614(00)01391-9
ISSN1873-4448
AutoresJi‐Xin Cheng, Suhua Wang, Xiaoyuan Li, YiJing Yan, Shihe Yang, Chuan‐Lu Yang, Jiannong Wang, W. K. Ge,
Tópico(s)Nonlinear Optical Materials Studies
ResumoPhotoinduced 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.
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