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Solar Energy Conversion and Electron Storage by a Cu 2 O/CuO Photocapacitive Electrode

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  • Huangjun Xue

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

  • Xin Wen

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

  • Cheng Fu

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

  • Haolan Zhan

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

  • Zongquan Zou

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

  • Ruifen Zhang

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

  • Yongpeng Xia

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

  • Fen Xu

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

  • Lixian Sun

    (Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China)

Abstract

Solar conversion devices are generally connected with energy storage systems to overcome the influence of sunlight variability. Developing an integrated solar energy conversion and storage device is an attractive approach to compensate for the energy loss of directly connecting these separate devices. In this work, a photocapacitive device is developed based on the Cu 2 O/CuO heterostructure, with Cu 2 O as a light absorber and CuO providing a platform for electron and ion storage. The coupling of Cu 2 O and CuO leads to a high specific capacitance of 135 mF/cm 2 under bias and an open-circuit potential of 0.62 V RHE . A photo-charge and dark-discharge ability of Cu 2 O/CuO system under zero-bias is also discovered and explained based on the concept of Faradaic junction. This work presents an avenue for the investigation of high-performance Cu 2 O-based solar energy storage devices.

Suggested Citation

  • Huangjun Xue & Xin Wen & Cheng Fu & Haolan Zhan & Zongquan Zou & Ruifen Zhang & Yongpeng Xia & Fen Xu & Lixian Sun, 2023. "Solar Energy Conversion and Electron Storage by a Cu 2 O/CuO Photocapacitive Electrode," Energies, MDPI, vol. 16(7), pages 1-11, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:7:p:3231-:d:1115286
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    References listed on IDEAS

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    2. Kunta Yoshikawa & Hayato Kawasaki & Wataru Yoshida & Toru Irie & Katsunori Konishi & Kunihiro Nakano & Toshihiko Uto & Daisuke Adachi & Masanori Kanematsu & Hisashi Uzu & Kenji Yamamoto, 2017. "Silicon heterojunction solar cell with interdigitated back contacts for a photoconversion efficiency over 26%," Nature Energy, Nature, vol. 2(5), pages 1-8, May.
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