標題: Sandwich-Nanostructured n-Cu2O/AuAg/p-Cu2O Photocathode with Highly Positive Onset Potential for Improved Water Reduction
作者: Lin, Yu-Chang
Hsu, Liang-Ching
Lin, Chia-Yu
Chiang, Chao-Lung
Chou, Che-Min
Wu, Wen-Wei
Chen, San-Yuan
Lin, Yan-Gu
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: solar water splitting;sandwich structure;copper(I) oxide;photocathode;localized surface plasmon resonance
公開日期: 23-Oct-2019
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 V-RHE in n-Cu2O/AuAg/p-Cu2O, is comparable with measurements from water reduction catalysts. The AuAg alloy sandwiched between the homo-junction 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.
URI: http://dx.doi.org/10.1021/acsami.9b11737
http://hdl.handle.net/11536/153188
ISSN: 1944-8244
DOI: 10.1021/acsami.9b11737
期刊: ACS APPLIED MATERIALS & INTERFACES
Volume: 11
Issue: 42
起始頁: 38625
結束頁: 38632
Appears in Collections:Articles