材料科学
纳米技术
Crystal(编程语言)
化学
结晶学
化学工程
计算机科学
工程类
程序设计语言
作者
Shigeru Ikeda,Wakaba Fujita,Riku Okamoto,Yukihiko Nosé,Ryoji Katsube,Kenji Yoshino,Takashi Harada
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:10 (66): 40310-40315
被引量:7
摘要
Chalcopyrite CuGaSe2 single crystals were successfully synthesized by the flux method using a home-made Bridgman-type furnace. The grown crystals were nearly stoichiometric with a Se-poor composition. Although a wafer form of the thus-obtained single crystal showed poor p-type electrical properties due to such unfavorable off-stoichiometry, these properties were found to be improved by applying a post-annealing treatment under Se vapor conditions. As a result, an electrode derived from the Se-treated single crystalline wafer showed appreciable p-type photocurrents. After deposition of a CdS ultrathin layer and a nanoparticulate Pt catalyst on the surface of the electrode, appreciable photoelectrochemical H2 evolution was observed over the modified electrode under photoirradiation by simulated sunlight with application of a bias potential of 0 VRHE.
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