Photosensitized electron injection from an ITO electrode to trichromophore dyes deposited on Langmuir-Blodgett films

被引：34

作者：

Wu, DG ^{[1
]}

Huang, CH ^{[1
]}

Gan, LB ^{[1
]}

Zheng, J ^{[1
]}

Huang, YY ^{[1
]}

Zhang, W ^{[1
]}

机构：

[1] Peking Univ, Univ Hong Kong, Joint Lab Rare Earth Mat & Inorgan Chem, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China

来源：

LANGMUIR | 1999年 / 15卷 / 21期

关键词：

D O I：

10.1021/la981737t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two novel trichromophore amphiphilic dyes 1-methyl-2,4,6-tris[2-(3'-methoxy-4'-(octadecycloxy)phenyl)- ethenyl]pyridinium iodide (MTMS) and 1-methyl-2,4,6-tris[2-(4'-(octadecyloxy)phenyl)ethenyl]pyridnium iodide (MTOS) have been synthesized and successfully transferred on semiconducting transparent indium-tin oxide (ITO) electrodes by a Langmuir-Blodgett (LB) technique. The observed photocurrent strongly depends on the applied electrode potential, the presence of O-2, the concentrations of methyl viologen (MV2+) and hydroquinone (H(2)Q), and the pH of the electrolyte. Action spectra of the photocurrent generation are coincident with the absorption spectra of the LB film-modified ITO electrode, indicating that the dyes aggregated in the LB film are responsible for the photocurrent. Under favorable conditions the quantum yield are as high as 1.40% and 1.54% for the monolayer films of MTMS and MTOS, respectively. Models for the mechanism of photocurrent generation under different conditions are proposed.

引用

页码：7276 / 7281

页数：6

共 22 条

[21] Photochromic and electrochemical properties of a novel azo pyridinium compound and its Langmuir-Blodgett films [J].