高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 448.

• 研究论文 • 上一篇    下一篇

酞菁氧钛/卟啉氧钒复合体系光导性能的协同增强效应

汪茫, 孙景志, 周成   

  1. 浙江大学高分子科学与工程系, 硅材料国家重点实验室, 杭州 310027
  • 收稿日期:2001-01-18 出版日期:2002-03-24 发布日期:2002-03-24
  • 通讯作者: 汪茫(1938年出生),男,教授,博士生导师,主要从事有机半导体光导等光电性能研究.E-mail:mwang@ipsm.zju.edu.cn E-mail:mwang@ipsm.zju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:50073018;69890230)资助

Synergetic Enhancement of Photoconductive Property in TiOPc/VOTPP Composite

WANG Mang, SUN Jing-Zhi, ZHOU Cheng   

  1. Department of Polymer Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
  • Received:2001-01-18 Online:2002-03-24 Published:2002-03-24

摘要: 在酞菁氧钛(TiOPc)/卟啉氧钒(VOTPP)复合光生材料中发现了光敏性的非线性增强现象,对复合体系的电子跃迁光谱和X射线衍射图的研究结果表明,在基态下两种材料之间没有明显相互作用,光致放电研究说明,该现象来自光激发状态下复合体系中的隙间态跃迁对光导的贡献,XPS测试结果表明酞菁氧钛与卟啉氧钒分子之间存在着定向的部分电荷转移,光致激发状态下的电荷转移是协同增强效应的起因.这种协同增强效应为利用弱的电子给体与弱的受体复合体系设计新型光导材料与器件提供了新方法.

关键词: 协同增强, 光敏性, 复合

Abstract: Nonlinear enhancement of photosensitivity were observed in organic photoreceptors based on TiOPc/VOTPP composite. Absorption spectra revealed no evidences of interactions between the electronic states of TiOPc and VOTPPunder ground state, X-ray diffraction analyses didn't show the changes in their condensed states in composite photoreceptors. Photoinduced discharge experiment indicated that the nonlinear effect was ascribed to the contribution of photogenerated carriers resulted from the excitation of gap states, which were intensified by the composing of heteromolecules. The data obtained from XPSmeasurement on composite materials suggested that there existed a fractional charge transition from TiOPc to VOTPP molecules, such photoinduced charge transfer between the two components was another factor related to the nonlinear effect. This synergetic enhancement effect provide a strategy for designation of novel photoconductive materials and devices driven in a low field based on weak electron donor/weak electron acceptor composites.

Key words: Synergetic enhancement, Photosensitivity, Composite

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