A Terpolymer Acceptor Enabling All-Polymer Solar Cells with a Broad Donor:Acceptor Composition Tolerance and Enhanced Stability

Bin Liu, Junwei Wang, Huiliang Sun, Ziang Wu, Chao Yao, Qiaogan Liao, Zixiang Wei, Wanli Yang, Xianhe Zhang, Hong Meng, Han Young Woo, Xugang Guo

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Achieving a broad donor:acceptor (D:A) composition tolerance in efficient organic solar cells (OSCs) is important for printing large-area solar cell modules. Herein, all-polymer solar cells (all-PSCs) based on new terpolymer acceptors and a well-known polymer donor PTB7-Th are fabricated to explore the effect of D:A ratio on morphology and photovoltaic performances. The all-PSCs show a promising power conversion efficiency (PCE) of 7.23% with an optimum D:A ratio of 1:2 and retain over 40% of its optimal PCE with ultrabroad D:A composition tolerance from 1:30 to 10:1. In addition, the all-PSCs can maintain 90% of its original PCE after 400 h of storage despite such broad range of D:A ratio, which is much better than those of other types of OSCs and even better than the benchmark all-polymer system with N2200 as the acceptor under the same condition. The results show the superiority of the all-PSCs in terms of D:A ratio tolerance and performance stability, which should be conducive to practical applications of all-PSCs.

    Original languageEnglish
    Article number2000436
    JournalSolar RRL
    Volume4
    Issue number11
    DOIs
    Publication statusPublished - 2020 Nov

    Bibliographical note

    Publisher Copyright:
    © 2020 Wiley-VCH GmbH.

    Keywords

    • all-polymer solar cells
    • film morphology
    • high donor:acceptor ratio tolerance
    • n-type terpolymers

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

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