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卟啉、酞菁共敏化二氧化钛纳米电极

Cosensitization of a Nanostructured TiO2 Electrode with Tetrasulfonated Porphyrins and Phthalocyanine

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【作者】 邓慧华毛海舫沈耀春陆祖宏许慧君

【Author】 DENG Hui - Hua MAO Hai - Fang SHEN Yao - Chun LU Zu - Hong XU Hui - Jun(National Laboratory of Molecular and Biomolecular Electronics , Southeast University, Nanjing ,210096)( Shanghai Institute of Organic Chemistry, The Chinese Academy of Sciences , Shanghai, 200032)( Institute of Photographic Chemistry, The Chinese Academy of Sciences , Beijing, 100101)

【机构】 东南大学分子与生物分子电子学实验室中国科学院上海有机化学研究所中国科学院感光化学研究所 南京210096上海200032南京210096北京100101

【摘要】 研究了染料对锌卟啉-氢卟啉(ZnTSPP-H2TSPP)、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H2TSPP,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.

【Abstract】 Photo - to - electric conversion of a nanostructured TiO2 electrode cosensitized with dye pairs of ZnTSPP - H2TSPP and ZnTSPP - GaTSPc was investigated. Doping of ZnTSPP reduces self -aggregation of H2TSPP 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 - H2TSPP and ZnTSPP - GaTSPc.

【基金】 国家自然科学基金(61525102,69371032)资助项目
  • 【文献出处】 化学学报 ,Acta Chimica Sinica , 编辑部邮箱 ,1999年11期
  • 【分类号】O646
  • 【被引频次】30
  • 【下载频次】337
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