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化学学报
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化学学报 ›› 1999, Vol. 57 ›› Issue (11): 1199-1205. 上一篇    下一篇

研究论文

卟啉、酞菁共敏化二氧化钛纳米电极

邓慧华;沈耀春;陆祖宏;毛海舫;许慧君   

  1. 东南大学分子与生物分子电子学实验室.南京(210018);中国科学院上海有机化 学研究所.上海(200032);中国科学院感光化学研究所.北京(100101)
  • 发布日期:1999-11-15

Cosensitization of a nanostructured TiO~2 electrode with tetrasulfonated porphyrins and phthalocyanine

Deng Huihua;Shen Yaochun;Lu Zuhong;Mao Haifang;Xu Huijun   

  1. Southeast Univ, Molec & Biomolec Electr Lab.Nanjing(210018);Shanghai Inst Organ Chem., CAS.Shanghai(200032);Inst Photog Chem, Acad Sinica. Beijing(100101)
  • Published:1999-11-15

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被引次数

33 | 3

研究了染料对锌卟啉-氢卟啉(ZnTSPP-H~2TSPP)、锌卟啉-镓酞菁(ZnTSPP-GaTSPc)共敏化二氧化钛纳米电极的光电转换特性和H~2TSPP,GaTSPc在电极表面的聚集态对光电转换的影响,共敏化显著提高了电极的光电转换并产生了混合效应。提出了低占据电荷转移的共敏化机理。

关键词: 卟啉, 酞菁, 二氧化钛, 纳米相材料, 电极, 锌络合物, 镓络合物, 光电变换, 电荷转移

Photo-to-electric conversion of a nanostructured TiO~2 electrode cosensitized with dye pairs of ZnTSPP-H~2TSPP and ZnTSPP-GaTSPc was investigated. Doping of ZnTSPP reduces self-aggregation of H~2TSPP and GaTSPc in the surface of the electrode. Cosensitization markedly enhances the photoelectric response of Q band and in the meantime greatly decreases that of Soret band under monochromatic illumination. But this decrease in Soret band is off-set by the enhancement of Q band. As a result, cosensitization improves the total photo-to-electric conversion in the whole wavelength range and creates the mixed effect in short-circuit photocurrent. The photoelectric behaviors of the cosensitized electrode is attributed to the presence of a low-lying charge-transfer state originating from the formation of heteroaggregates in dye pairs of ZnTSPP-H~2TSPP and ZnTSPP-GaTSPc.

Key words: PORPHYRIN, PHTHALOCYANIN (=PHTHALOCYANINE), TITANIUM DIOXIDE, NANOPHASE MATERIALS, ELECTRODE, ZINC COMPLEX, GALLIUM COMPLEX, PHOTOELECTRICAL CONVERSION, CHARGE TRANSFER

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