作　　者： ; ;

机构地区： 北京大学化学与分子工程学院

出　　处： 《物理化学学报》 1999年第4期293-298,共6页

摘　　要： 研究了五甲川菁（PMC）敏化SnO2纳米结构电极的光电化学行为．结合循环伏安曲线及五甲川菁的光吸收阈值，初步确定了五甲川菁染料电子基态和激发态能级．结果表明，五甲川菁染料电子激发态能级能与SnO2纳米粒子导带边位置相匹配，因而使用该染料敏化可以显著地提高SnO2纳米结构电极的光电流，使SnO2纳米结构电极吸收波长红移至可见光区和近红外区，光电转换效率（IPCE）得到明显改善，其值最高可达45．7％． A new cyanine dye (abbr. PMC in the following) was synthesized and was used to sensitize SnO2 nanostructured porous film studied in this article. The structure of PMC determined by NMR and element analytical technique is [GRAPHICS] The photocurrent action spectra, the photocurrent-potential curves, the photocurrent transients and the UV-Vis absorption curves were measured with the unsensitized and sensitized elelctrodes. The positions of electron ground state and electron excited state of PMC were determined by cyclic voltammetry and UV-Vis spectroscopy. Subsequently, the mechanism of photo-induced current was studied preliminarily.

关 键 词： 染料 敏化 纳米 多孔膜 电极 光电化学 二氧化锡

领　　域： [理学] [理学]