Enhancing the performance of the electron acceptor ITIC-Th via tailoring its end groups

Zeyuan Li, Shuixing Dai, Jingming Xin, Lin Zhang, Yang Wu, Jeromy Rech, Fuwen Zhao, Tengfei Li, Kuan Liu, Qiao Liu, Wei Ma, Wei You, Chunru Wang, Xiaowei Zhan

    Research output: Journal article publicationJournal articleAcademic researchpeer-review

    47 Citations (Scopus)

    Abstract

    We choose the high-performance nonfullerene acceptor ITIC-Th as an example, and incorporate electron-donating methoxy and electron-withdrawing F groups onto the terminal group 1,1-dicyanomethylene-3-indanone (IC) to construct a small library of four fused-ring electron acceptors. With this series, we systematically investigate the effects of the substituents on the end-groups on the electronic properties, charge transport, film morphology, and photovoltaic properties of the ITIC-Th series. The electron-withdrawing ability increases from methoxylated to unsubstituted, fluorinated, and difluorinated IC, leading to a downshift of energy levels and a redshift of absorption spectra. Optimized organic solar cells based on the ITIC-Th series show power conversion efficiencies ranging from 8.88% to 12.1%.

    Original languageEnglish
    Pages (from-to)537-543
    Number of pages7
    JournalMaterials Chemistry Frontiers
    Volume2
    Issue number3
    DOIs
    Publication statusPublished - 2018

    ASJC Scopus subject areas

    • General Materials Science
    • Materials Chemistry

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