DataVXACS Applied Energy MaterialsPaper
journal article·2022-01-24

Enhanced Light Trapping and Charge Separation via Pyramidal Cu2O/NiCo-LDH Photocathode for Efficient Water Splitting

Yingzhi Zhao, Weiming Song, Dao Wang, Hedong Chen, Guofu Zhou

ACS Applied Energy Materials· Volume 5· Issue 1
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Source abstract

Abstract

To improve PEC water splitting efficiency, Cu2O thin film electrodeposites on pyramidal Si (PSi) was innovatively introduced as an antireflective substrate combining with an Au layer. In this way, a PSi/Au/Cu2O photocathode exhibits a photocurrent enhanced 330% more than that of bare planar Si/Au/Cu2O photocathode. Compared with reversible hydrogen electrode the final fabricated photocathode with earth-abundant NiCo-LDH semiconductor cocatalyst exhibits a highly competitive photocurrent of 7.54 mA cm–2 at 0 V. It mainly results from the improved light trapping, enhanced carrier separation, and NiCo-LDH with triple enhanced effects. That means p-Cu2O and NiCo-LDH possess a type-II heterojunction to enhance photocarrier separation efficiency. Ultimately, NiCo-LDH semiconductor cocatalyst also acts as a maskant which can enhance PSi/Au/Cu2O photocathode stability. Through light trapping effect of the pyramidal Si structure and type-II heterojunction for efficient charge separation, this work provide insight into superior performance in PEC water splitting.
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Research context

Electronic materials

OpenAlex topics: Copper-based nanomaterials and applications · ZnO doping and properties · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, People’s Republic of China

South China Academy of Advanced Optoelectronics, Institute of Advanced Materials, South China Normal University, Guangzhou 510006, Guangdong People’s Republic of China

National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, People’s Republic of China

Academy of Shenzhen Guohua Optoelectronics, Shenzhen 518110, People’s Republic of China

Funding

State Administration of Foreign Experts Affairs · Ministry of Education of the People's Republic of China · Guangzhou Science and Technology Program key projects · Natural Science Foundation of Guangdong Province · Higher Education Discipline Innovation Project · Guangdong Provincial Key Laboratory of Optical Information Materials and Technology · Chang Jiang Scholars and Innovative Research Teams in Universities

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