Enhancing Performance of Large‐Area Organic Solar Cells with Thick Film via Ternary Strategy

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  • Jianqi Zhang
    CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
  • Yifan Zhao
    CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
  • Jin Fang
    CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
  • Liu Yuan
    CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
  • Benzheng Xia
    CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
  • Guodong Wang
    CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
  • Zaiyu Wang
    State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
  • Yajie Zhang
    CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
  • Wei Ma
    State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
  • Wei Yan
    Department of Environmental Science and Engineering Xi'an Jiaotong University Xi'an 710049 China
  • Wenming Su
    Division of Printed Electronics Suzhou Institute of Nano‐Tech and Nano‐Bionics (SINANO) Chinese Academy of Sciences Suzhou 215123 China
  • Zhixiang Wei
    CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China

Description

<jats:p>Large‐scale fabrication of organic solar cells requires an active layer with high thickness tolerability and the use of environment‐friendly solvents. Thick films with high‐performance can be achieved via a ternary strategy studied herein. The ternary system consists of one polymer donor, one small molecule donor, and one fullerene acceptor. The small molecule enhances the crystallinity and face‐on orientation of the active layer, leading to improved thickness tolerability compared with that of a polymer‐fullerene binary system. An active layer with 270 nm thickness exhibits an average power conversion efficiency (PCE) of 10.78%, while the PCE is less than 8% with such thick film for binary system. Furthermore, large‐area devices are successfully fabricated using polyethylene terephthalate (PET)/Silver gride or indium tin oxide (ITO)‐based transparent flexible substrates. The product shows a high PCE of 8.28% with an area of 1.25 cm<jats:sup>2</jats:sup> for a single cell and 5.18% for a 20 cm<jats:sup>2</jats:sup> module. This study demonstrates that ternary organic solar cells exhibit great potential for large‐scale fabrication and future applications.</jats:p>

Journal

  • Small

    Small 13 (21), 2017-04-11

    Wiley

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