High-Performance Eight-Membered Indacenodithiophene-Based Asymmetric A-D-A Type Non-Fullerene Acceptors

Chao Li, Jiali Song, Linglong Ye, Changwoo Koh, Kangkang Weng, Huiting Fu, Yunhao Cai, Yuanpeng Xie, Donghui Wei, Han Young Woo, Yanming Sun

    Research output: Contribution to journalArticlepeer-review

    44 Citations (Scopus)

    Abstract

    Indacenodithiophene (IDT) has been widely used as the central core to design high-performance acceptor-donor-acceptor (A-D-A)-type non-fullerene acceptors (NFAs). NFAs based on five-, six-, seven-, and nine-membered IDT have been successfully prepared. However, less research attention has been paid to the eight-membered IDT derivative. In this study, a novel asymmetric TTPTTT building block as an eight-membered IDT unit are designed and synthesized. The effect of nonfluorinated, monofluorinated, and difluorinated end-capping groups on the photovoltaic performance of TTPTTT-based NFAs are specifically investigated. By blending with the polymer donor PBT1-C, organic solar cells (OSCs) based on TTPTTT-IC, TTPTTT-2F, and TTPTTT-4F exhibited power conversion efficiencies (PCEs) of 7.91, 11.52, and 12.05%, respectively. Our results indicate that the asymmetric TTPTTT building block as an eight-membered IDT derivative is a promising central core unit for designing high-performance A-D-A type NFAs.

    Original languageEnglish
    Article number1800246
    JournalSolar RRL
    Volume3
    Issue number1
    DOIs
    Publication statusPublished - 2019 Jan 1

    Bibliographical note

    Publisher Copyright:
    © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

    Keywords

    • asymmetric non-fullerene acceptor
    • indacenodithiophene derivative
    • organic solar cells
    • power conversion efficiency

    ASJC Scopus subject areas

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

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