InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water Splitting

The heterostructuring and doping concepts have proved to obtain a novel n-InGaN/p-Cu2O nanowire (NW) photoanode by strong enhancement of the photocurrent compared to a bare InGaN NW photoanode in solar water splitting. The large photocurrent is due to the maximized photocarrier separation and hole t...

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Main Authors:	Yingzhi Zhao, Lingyun Xie, Hedong Chen, Xingyu Wang, Yongjie Chen, Guofu Zhou, Richard Nötzel
Format:	Article
Language:	English
Published:	Frontiers Media S.A. 2021-05-01
Series:	Frontiers in Physics
Subjects:	Cu2O InGaN nanowires core-shell stability co-catalyst
Online Access:	https://www.frontiersin.org/articles/10.3389/fphy.2021.684283/full

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spelling	doaj-53ba14337f934621b941580c6292e77d2021-05-04T06:16:45ZengFrontiers Media S.A.Frontiers in Physics2296-424X2021-05-01910.3389/fphy.2021.684283684283InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water SplittingYingzhi Zhao0Lingyun Xie1Hedong Chen2Xingyu Wang3Yongjie Chen4Guofu Zhou5Guofu Zhou6Guofu Zhou7Richard Nötzel8Richard Nötzel9Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou, ChinaAcademy of Shenzhen, Guohua Optoelectronics, Shenzhen, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou, ChinaThe heterostructuring and doping concepts have proved to obtain a novel n-InGaN/p-Cu2O nanowire (NW) photoanode by strong enhancement of the photocurrent compared to a bare InGaN NW photoanode in solar water splitting. The large photocurrent is due to the maximized photocarrier separation and hole transfer to the surface in the depletion zone of the p–n heterojunction established by the p-Cu2O layer, forming a thin, uniform shell-layer around the n-InGaN NW core by electrodeposition. For sufficiently thin Cu2O layers, the upward energy band bending in the depletion zone extends up to the surface for optimized hole transport and surface reaction. Thick Cu2O layers on top of the InGaN NWs act as common photocathodes. The functional InGaN/Cu2O heterostructure core-shell NW photoanode is chemically self-stabilized at positive applied voltage by a thin CuO surface layer. Final deposition of the earth-abundant NiOOH co-catalyst boosts the photocurrent of the InGaN/Cu2O/NiOOH complete NW photoanode into the competitive mA/cm2 range.https://www.frontiersin.org/articles/10.3389/fphy.2021.684283/fullCu2OInGaN nanowirescore-shellstabilityco-catalyst
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Yingzhi Zhao Lingyun Xie Hedong Chen Xingyu Wang Yongjie Chen Guofu Zhou Guofu Zhou Guofu Zhou Richard Nötzel Richard Nötzel
spellingShingle	Yingzhi Zhao Lingyun Xie Hedong Chen Xingyu Wang Yongjie Chen Guofu Zhou Guofu Zhou Guofu Zhou Richard Nötzel Richard Nötzel InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water Splitting Frontiers in Physics Cu2O InGaN nanowires core-shell stability co-catalyst
author_facet	Yingzhi Zhao Lingyun Xie Hedong Chen Xingyu Wang Yongjie Chen Guofu Zhou Guofu Zhou Guofu Zhou Richard Nötzel Richard Nötzel
author_sort	Yingzhi Zhao
title	InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water Splitting
title_short	InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water Splitting
title_full	InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water Splitting
title_fullStr	InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water Splitting
title_full_unstemmed	InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water Splitting
title_sort	ingan/cu2o heterostructure core-shell nanowire photoanode for efficient solar water splitting
publisher	Frontiers Media S.A.
series	Frontiers in Physics
issn	2296-424X
publishDate	2021-05-01
description	The heterostructuring and doping concepts have proved to obtain a novel n-InGaN/p-Cu2O nanowire (NW) photoanode by strong enhancement of the photocurrent compared to a bare InGaN NW photoanode in solar water splitting. The large photocurrent is due to the maximized photocarrier separation and hole transfer to the surface in the depletion zone of the p–n heterojunction established by the p-Cu2O layer, forming a thin, uniform shell-layer around the n-InGaN NW core by electrodeposition. For sufficiently thin Cu2O layers, the upward energy band bending in the depletion zone extends up to the surface for optimized hole transport and surface reaction. Thick Cu2O layers on top of the InGaN NWs act as common photocathodes. The functional InGaN/Cu2O heterostructure core-shell NW photoanode is chemically self-stabilized at positive applied voltage by a thin CuO surface layer. Final deposition of the earth-abundant NiOOH co-catalyst boosts the photocurrent of the InGaN/Cu2O/NiOOH complete NW photoanode into the competitive mA/cm2 range.
topic	Cu2O InGaN nanowires core-shell stability co-catalyst
url	https://www.frontiersin.org/articles/10.3389/fphy.2021.684283/full
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InGaN/Cu2O Heterostructure Core-Shell Nanowire Photoanode for Efficient Solar Water Splitting

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