高等学校化学学报

高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (2): 323.

• 研究论文 • 上一篇    下一篇

酞菁氧钛/N,N-二甲苯基苝酰亚胺复合薄膜的光伏极性反转

孙景志,  曹健,  徐海鹏,  汪茫   

  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:2005-01-19 出版日期:2006-02-10 发布日期:2006-02-10
  • 通讯作者: 孙景志(1964年出生), 男, 博士, 副教授, 主要从事有机半导体复合光电功能材料的研究. E-mail:oplsunjz@zju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 90101008)和国家科技部“九七三”计划项目(批准号: 2002CB613401)资助. 

Photovoltaic Polarity Inversion in Thin Filma of Titanoxophthalocyanine/N,N-Bistolylperylene Tetracarboxylic Dimimide Composite Films

 SUN Jing-Zhi, CAO Jian, XU Hai-Feng, HONG Huang   

  1. Department of Polymer Science & Engineering,  State Key Laboratory of Silicon Materials,  Zhejiang University,  Hangzhou 310027,    China
  • Received:2005-01-19 Online:2006-02-10 Published:2006-02-10
  • Contact: SUN Jing-Zhi,E-mail:oplsunjz@zju.edu.cn

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被引次数

4

摘要：

用表面光电压谱和电场诱导表面光电压谱相结合的方法, 研究了酞菁氧钛/N,N-二甲苯基苝酰亚胺复合薄膜的表面光伏行为, 发现加入N,N-二甲苯基苝酰亚胺使复合薄膜在可见光区和近红外光区均产生负的光伏响应, 可归结为光伏极性反转现象. 该响应随着外加偏压方向的改变而改变正负值, 表现出表面态跃迁的特征.  根据N,N-二甲苯基苝酰亚胺n型半导体的性质,  从价带到表面态和从表面态到导带的跃迁能量的差别以及依赖于偏压方向的电场诱导表面光伏响应,  确认表面态来自N,N-二甲苯基苝酰亚胺组分.

关键词: 光伏极性反转; 表面态; 复合材料; 表面光电压

Abstract:

Surface photovoltaic behavior of titanoxophthalocyanine(TiOPc)/N,N-bistolylperylene tetracarboxylic diimide(ToPTCDI) composite films was investigated with surface photovoltaic spectroscopy(SPS) and field induced surface photovoltaic spectroscopy(FISPS).  It was found that the introduction of  ToPTCDI into TiOPC could result in negative SPS response both in visible and in near-infrared spectral regions,  which was assigned to the phenomenon of photovoltaic polarity inversion.  The polarity of the SPS signals could be tuned by external bias,  showing the characteristic of surface electronic states.  Based on the n\|type nature of ToPTCDI,  the energy space between the optical transitions from valence band to surface state and from surface state to conduction band,  as well the bias-direction dependent FISPS signals,  the origin of the surface electronic state was ascribed to ToPTCDI component.

Key words: 光伏极性反转; 表面态; 复合材料; 表面光电压

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