Investigation of the influence for ZnSe phase in Ag2ZnSnSe4 and ZnO/Ag2ZnSnSe4 photoanodes on their photoelectrochemical activities in salt water solution

Yi Chia Su, Yan Gu Lin, Kong Wei Cheng*

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

3 引文 斯高帕斯(Scopus)

摘要

In this study, quaternary Ag2ZnSnSe4 (AZTSe) photoanodes with low and high ratios of ZnSe phase are made to understand the influence on the charge-transfer mechanisms, reaction kinetics and photoelectrochemical activities in electrolyte. Photoelectrochemical activities of 7.5 and 5.25 mA/cm2 at the given voltage of 1 V (vs. Ag/AgCl) are obtained using the AZTSe sample containing low ratio (atomic percentage of around 21% in sample) and high ratio (atomic percentage of around 37% in sample) of ZnSe phase, respectively. From the electrochemical measurements and X-ray absorption spectra of samples, the ZnSe phase can attract the light-driven electrons from the sample with low ratio of ZnSe phase (atomic percentage of 21% in sample). However, for the sample containing high ratio of ZnSe phase (atomic percentage of 37% in sample), the ZnSe acts as the recombination center and results in poor photoelectrochemical activity. With the modification of ZnO rods on sample, its long-term photoelectrochemical activity is improved due to high charge transportation kinetic and photo-driven holes accumulation on ZnO rods rather than on AZTSe sample. Our study reports a significant observation on the influence of ZnSe phase for photoelectrochemical salt-water splitting.

原文英語
頁(從 - 到)15975-15991
頁數17
期刊International Journal of Hydrogen Energy
48
發行號42
DOIs
出版狀態已出版 - 15 05 2023

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© 2023 Hydrogen Energy Publications LLC

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