CdS纳米棒/酞菁氧钛复合光导体的光电导性能

Photoconductivity of CdS Nanorods/TiOPc Composite Photoconductors

采用以溶剂热方法合成的CdS纳米棒与酞菁氧钛复合制备的复合光导体,在570nm光照下其光电导性能明显提高,将质量分数为5%的CdS纳米棒与TiOPc复合使光敏性能提高32%.电子结构的数据和表面光电压谱分析结果表明,复合体系中存在从CdS纳米棒到TiOPc的光致空穴转移,TiOPc因被CdS纳米棒敏化而表现出高的光电导性能.

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.