Fused Hexacyclic Nonfullerene Acceptor with Strong Near-Infrared Absorption for Semitransparent Organic Solar Cells with 9.77% Efficiency

Wei Wang, Cenqi Yan, Tsz Ki Lau, Jiayu Wang, Kuan Liu, Yan Fan, Xinhui Lu, Xiaowei Zhan

    Research output: Journal article publicationJournal articleAcademic researchpeer-review

    393 Citations (Scopus)

    Abstract

    A fused hexacyclic electron acceptor, IHIC, based on strong electron-donating group dithienocyclopentathieno[3,2-b]thiophene flanked by strong electron-withdrawing group 1,1-dicyanomethylene-3-indanone, is designed, synthesized, and applied in semitransparent organic solar cells (ST-OSCs). IHIC exhibits strong near-infrared absorption with extinction coefficients of up to 1.6 × 105m−1 cm−1, a narrow optical bandgap of 1.38 eV, and a high electron mobility of 2.4 × 10−3 cm2 V−1 s−1. The ST-OSCs based on blends of a narrow-bandgap polymer donor PTB7-Th and narrow-bandgap IHIC acceptor exhibit a champion power conversion efficiency of 9.77% with an average visible transmittance of 36% and excellent device stability; this efficiency is much higher than any single-junction and tandem ST-OSCs reported in the literature.

    Original languageEnglish
    Article number1701308
    JournalAdvanced Materials
    Volume29
    Issue number31
    DOIs
    Publication statusPublished - 18 Aug 2017

    Keywords

    • dithienocyclopentathieno[3,2-b]thiophene
    • fused-ring electron acceptors
    • near-infrared absorption
    • nonfullerene acceptors
    • organic solar cells

    ASJC Scopus subject areas

    • General Materials Science
    • Mechanics of Materials
    • Mechanical Engineering

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