Photoconductivity of CdS Nanorods/TiOPc Composite Photoconductors

Abstract

Abstract: The photoconductive properties of composite photoreceptors based on titanophthalocyanine(TiOPc) and CdS nanorods were sytematically investigated with photoinduced discharge technique. Upon excitation via 570 nm light, the composite photoreceptors showed evident enhancement in photosensitivity(S). A 32% increase in S was observed for a composite in a mass fraction of 5% CdS nanorods with respect to TiOPc component. The electronic structure data of CdS and TiOPc, together with the analysis of the surface photovoltage spectroscopic curves indicated that there existed a process of charge transfer from CdS to TiOPc, which is the mechanism for the sensitization of TiOPc by CdS nanorods, thereby bringing the high photoconductivity of TiOPc component into play. This study provided an example of promising method to improve the performance of opto-electronic devices by inorganic semiconductor materials in nanostructure.

Key words: CdS nanorod, Composite material, Charge transfer, Photosensitivity

CLC Number:

O643

TrendMD:

SUN Jing-Zhi, CAO Jian, LI Han-Ying, HONG Jian, WANG Mang. Photoconductivity of CdS Nanorods/TiOPc Composite Photoconductors[J]. Chem. J. Chinese Universities, 2005, 26(9): 1716.

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Photoconductivity of CdS Nanorods/TiOPc Composite Photoconductors

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