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Title: Preparation of a CuGaSe2 single crystal and its photocathodic properties
Authors: Ikeda, Shigeru
Fujita, Wakaba
Okamoto, Riku
Nose, Yoshitaro  kyouindb  KAKEN_id  orcid (unconfirmed)
Katsube, Ryoji  kyouindb  KAKEN_id  orcid (unconfirmed)
Yoshino, Kenji
Harada, Takashi
Author's alias: 池田, 茂
藤田, わかば
野瀬, 嘉太郎
勝部, 涼司
吉野, 賢二
原田, 隆史
Issue Date: 2020
Publisher: Royal Society of Chemistry (RSC)
Journal title: RSC Advances
Volume: 10
Issue: 66
Start page: 40310
End page: 40315
Abstract: 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.
Rights: © The Royal Society of Chemistry 2020. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
DOI(Published Version): 10.1039/d0ra07904a
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