PHOTOELECTROCHEMICAL PROPERTIES OF BISMUTH OXYHALIDE FILMS

被引：81
作者：
POZNYAK, SK
KULAK, AI
机构：
[1] Institute of Physico-Chemical Problems, Byelorussian State University, Minsk
来源：
ELECTROCHIMICA ACTA | 1990年 / 35卷 / 11-12期
关键词：
bismuth oxyhalides; layered semiconductors; photoelectrochemistry; sensitization;
D O I：
10.1016/0013-4686(90)87103-9
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The photoelectrochemical (PEC) properties of bismuth oxyhalide (BiOCl, BiOBr, and BiOI) electrodes prepared by anodic oxidation of bismuth films on a platinum substrate have been studied. In acidified potassium halide solutions, these electrodes have been found to exhibit the PEC properties characteristic of p-type semiconductors. The efficiency of the PEC process appreciably decreases in the series BiOCl > BiOBr > BiOI. Effective protectors of the BiOHal electrode photodecomposition are dissolved oxygen and hydroquinone/quinone redox pair. The spectral sensitization of BiOHal electrodes can be carried out by different dyes, the quantum efficiency of the sensitized process being relatively high (3-7%) in a number of cases. The ways of increasing the stability of sensitized PEC process on BiOHal electrodes are considered. © 1990.
引用
收藏
页码：1941 / 1947
页数：7
相关论文
共 26 条
123