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

doi:10.1021/acsami.9b11737

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

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

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 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.

Original language	English
Pages (from-to)	38625-38632
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	42
DOIs	https://doi.org/10.1021/acsami.9b11737
Publication status	Published - 2019 Oct 23

All Science Journal Classification (ASJC) codes

General Materials Science

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10.1021/acsami.9b11737

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

abstract = "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.",

author = "Lin, \{Yu Chang\} and Hsu, \{Liang Ching\} and Lin, \{Chia Yu\} and Chiang, \{Chao Lung\} and Chou, \{Che Min\} and Wu, \{Wen Wei\} and Chen, \{San Yuan\} and Lin, \{Yan Gu\}",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = oct,

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doi = "10.1021/acsami.9b11737",

language = "English",

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journal = "ACS Applied Materials and Interfaces",

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T1 - Sandwich-Nanostructured n-Cu2O/AuAg/p-Cu2O Photocathode with Highly Positive Onset Potential for Improved Water Reduction

AU - Lin, Yu Chang

AU - Hsu, Liang Ching

AU - Lin, Chia Yu

AU - Chiang, Chao Lung

AU - Chou, Che Min

AU - Wu, Wen Wei

AU - Chen, San Yuan

AU - Lin, Yan Gu

PY - 2019/10/23

Y1 - 2019/10/23

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85073436048

UR - https://www.scopus.com/pages/publications/85073436048#tab=citedBy

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SN - 1944-8244

VL - 11

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EP - 38632

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 42

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

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