Effective photoinduced electron transfer in hetero-deposited redox polymer LB films
Effective photoinduced electron transfer in hetero-deposited redox polymer LB films
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DOI：
10.1021/la981527g
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发表时间：
1999-02-16
期刊：
影响因子：
3.9
通讯作者：
Miyashita, T
中科院分区：
文献类型：
--
作者：
Aoki, A;Abe, Y;Miyashita, T
钌联吡啶配合物和二茂铁衍生物在异质沉积的氧化还原聚合物LB膜中的空间排列用于控制光诱导电子转移反应产生的光电流的方向和高量子效率。两种异质沉积的结构构造通过改变这些氧化还原聚合物单分子膜的LB技术的沉积顺序。的异质沉积的氧化还原聚合物LB膜的循环伏安图显示电流整流和电荷存储性能。在光照射下，由Ru共聚物LB膜作为内层和Pc共聚物LB膜作为外层组成的异质沉积氧化还原聚合物LB膜在ITO（Fc/Ru/ITO）电极上观察到阳极光电流，而在相反层状结构（Ru/Fc/ITO）电极上观察到阴极光电流。光电流的方向取决于氧化还原聚合物LB膜在ITO电极上的沉积顺序。异质沉积氧化还原聚合物LB膜的光电流量子效率为5.9%。高的光电流转换效率的解释是由于异质沉积LB膜结构的存在下的光致电荷分离的重组的抑制。
The spatial arrangement of the ruthenium dipyridyl complex and ferrocene derivative in heterodeposited redox polymer Langmuir-Blodgett (LB) films is used for the direction control of the photocurrent flow resulting from the photoinduced electron-transfer reaction and the high quantum efficiency. Two kinds of heterodeposited structures are constructed by varying the deposition order of these redox polymer monolayers by the LB technique. The cyclic voltammograms of the heterodeposited redox polymer LB films show current rectifying and charge storage properties. On light irradiation, the anodic photocurrent is observed at the heterodeposited redox polymer LB films consisting of Ru copolymer LB film as an inner layer and Pc copolymer LB film as an outer layer on the ITO (Fc/Ru/ITO) electrodes, whereas a cathodic photocurrent is observed at the reverse layered structure (Ru/Fc/ITO) electrodes. The direction of photocurrent flow depends on the deposition order of the redox polymer LB films on the ITO electrode. A photocurrent quantum efficiency of 5.9% of the heterodeposited redox polymer LB film is achieved. The high photocurrent conversion efficiency is explained by the inhibition of the recombination of the photoinduced charge separation due to the presence of the heterodeposited LB film structures.