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Hybrid Heterojunction and Solid-State Photoelectrochemical Solar Cells

Authors

  • Xiao Li,

    1. School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing, China
    2. Center for Nano and Micro Mechanics (CNMM), Tsinghua University, Beijing, China
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  • Xiaobei Zang,

    1. School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing, China
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  • Xinming Li,

    1. National Center for Nanoscience and Technology, Zhongguancun, Beijing, China
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  • Miao Zhu,

    1. School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing, China
    2. Center for Nano and Micro Mechanics (CNMM), Tsinghua University, Beijing, China
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  • Qiao Chen,

    1. School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing, China
    2. Center for Nano and Micro Mechanics (CNMM), Tsinghua University, Beijing, China
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  • Kunlin Wang,

    1. School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing, China
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  • Minlin Zhong,

    1. School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing, China
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  • Jinquan Wei,

    1. School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing, China
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  • Dehai Wu,

    1. Department of Mechanical Engineering, Tsinghua University, Beijing, China
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  • Hongwei Zhu

    Corresponding author
    1. School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing, China
    2. Center for Nano and Micro Mechanics (CNMM), Tsinghua University, Beijing, China
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Abstract

A hybrid heterojunction and solid-state photoelectrochemical solar cell based on graphene woven fabrics (GWFs) and silicon is designed and fabricated. The GWFs are transferred onto n-Si to form a Schottky junction with an embedded polyvinyl alcohol based solid electrolyte. In the hybrid solar cell, solid electrolyte serves three purposes simutaneously; it is an anti-reflection layer, a chemical modification carrier, and a photoelectrochemical channel. The open-circuit voltage, short-circuit current density, and fill factor are all significantly improved, achieving an impressive power conversion efficiency of 11%. Solar cell models are constructed to confirm the hybrid working mechanism, with the heterojunction junction and photoelectrochemical effect functioning synergistically.

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