Photoelectrochemical properties of electrostatically self-assembled multilayer films formed by three bipolar hemicyanines and H4SiW12O40

被引：19
作者：
Chen, Xi [1 ,2 ]
Gao, Li-Hua [3 ]
Zheng, Ze-Bao [1 ,2 ]
Wang, Ke-Zhi [1 ,2 ]
机构：
[1] Beijing Normal Univ, Coll Chem, Beijing 100875, Peoples R China
[2] Beijing Normal Univ, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China
[3] Beijing Technol & Business Univ, Dept Chem, Sch Sci, Beijing 100048, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2013年 / 48卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Optical properties; Thin films; Electrochemical properties; Photoelectron spectroscopy; LANGMUIR-BLODGETT-FILMS; PHOTOCURRENT GENERATION; ELECTROCATALYTIC REDUCTION; 12-TUNGSTOSILICIC ACID; COMPOSITE FILMS; PRUSSIAN BLUE; FABRICATION; ELECTRODES; CONVERSION; DYES;
D O I：
10.1016/j.materresbull.2012.11.043
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The electrostatically self-assembled multilayer films of three bipolar hemicyanines with varied alkyl chain lengths were prepared by alternating adsorption of H4SiW12O40 and these hemicyanines, and characterized by UV-vis absorption spectroscopy, X-ray photoelectron spectroscopy and cyclic voltammetry. The results showed that these inorganic-organic composite films were uniformly deposited with good electrochemical activity. Photoelectrochemical investigations showed that the films exhibited large cathodic photocurrent densities of 0.36-1.02 mu A/cm(2) with the monochromatic incident photon-to-electron conversion efficiency of 0.75-0.98% while irradiated with 100 mW/cm(2) polychromatic light (730 nm > lambda > 325 nm) at an applied potential of -0.2 V vs. saturated calomel electrode, being strongly dependent on the alkyl chain lengths. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：595 / 602
页数：8
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