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Advanced Materials

A Non-Fullerene Small Molecule as Efficient Electron Acceptor in Organic Bulk Heterojunction Solar Cells

Authors

  • Yan Zhou,

    1. Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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  • Lin Ding,

    1. Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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  • Ke Shi,

    1. Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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  • Ya-Zhong Dai,

    1. Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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  • Na Ai,

    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, State Key Laboratory of Physics and Chemistry of Luminescence, Guangzhou 510640, China
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  • Jian Wang,

    Corresponding author
    1. Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, State Key Laboratory of Physics and Chemistry of Luminescence, Guangzhou 510640, China
    • Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, State Key Laboratory of Physics and Chemistry of Luminescence, Guangzhou 510640, China
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  • Jian Pei

    Corresponding author
    1. Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
    • Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China.
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Abstract

A novel n-type small molecule FFI-1 was synthesized as the electron acceptor to replace PCBM in solution-processed organic BHJ solar cells. Its LUMO level (around -3.5 eV) both matches the work function of the cathode and increases VOC of the devices, making it a promising acceptor candidate. With P3HT: FFI-1 (1:2 w/w) as active layer and LiF/Al as the cathode, the best power conversion efficiency (PCE) reaches 1.86%.

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