Sandwich-Nanostructured n-Cu2O/AuAg/p-Cu2O Photocathode with Highly Positive Onset Potential for Improved Water Reduction

Yu Chang Lin, Liang Ching Hsu, Chia Yu Lin, Chao Lung Chiang, Che Min Chou, Wen Wei Wu, San Yuan Chen, Yan Gu Lin

研究成果: Article同行評審

32 引文 斯高帕斯(Scopus)

摘要

An n-Cu2O layer formed a high-quality buried junction with p-Cu2O to increase the photovoltage and thus to shift the turn-on voltage positively. Mott-Schottky measurements confirmed that the improvement benefited from a positive shift in flat-band potential. The obtained extremely positive onset potential, 0.8 VRHE in n-Cu2O/AuAg/p-Cu2O, is comparable with measurements from water reduction catalysts. The AuAg alloy sandwiched between the homojunction of n-Cu2O and p-Cu2O improved the photocatalytic performance. This alloy both served as an electron relay and promoted electron-hole pair generation in nearby semiconductors; the charge transfer between n-Cu2O and p-Cu2O in the sandwich structure was measured with X-ray absorption spectra. The proposed sandwich structure can be considered as a new direction for the design of efficient solar-related devices.

原文English
頁(從 - 到)38625-38632
頁數8
期刊ACS Applied Materials and Interfaces
11
發行號42
DOIs
出版狀態Published - 2019 10月 23

All Science Journal Classification (ASJC) codes

  • 一般材料科學

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