卟啉、酞菁共敏化二氧化钛纳米电极  

Cosensitization of a Nanostructured TiO_2 Electrode with Tetrasulfonated Porphyrins and Phthalocyanine

作　　者：邓慧华[1] 毛海舫[2] 沈耀春[1] 陆祖宏[1] 许慧君[3] 

机构地区：[1]东南大学分子与生物分子电子学实验室,南京210096 [2]中国科学院上海有机化学研究所,上海200032 [3]中国科学院感光化学研究所,北京100101

出　　处：《化学学报》1999年第11期1199-1205,共7页Acta Chimica Sinica

基　　金：国家自然科学基金(61525102;69371032)资助项目

摘　　要：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.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.

关 键 词：卟啉 酞菁 敏化 太阳能电池 二氧化钛 纳米电极 

分 类 号：TM914.4[电气工程—电力电子与电力传动]