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

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 end-groups on electronic properties, charge transport, film morphology, and photovoltaic properties in ITIC-Th series. Electron-withdrawing ability increases from methoxylated to unsubstituted, fluorinated, and difluorinated IC, leading to downshift of energy levels and redshift of absorption spectra. The optimized organic solar cells based on ITIC-Th series show power conversion efficiencies ranging from 8.88% to 12.1%.

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Publication details

The article was received on 30 Nov 2017, accepted on 10 Jan 2018 and first published on 12 Jan 2018


Article type: Research Article
DOI: 10.1039/C7QM00547D
Citation: Mater. Chem. Front., 2017, Accepted Manuscript
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    Enhancing performance of electron acceptor ITIC-Th via tailoring end groups

    Z. Li, S. Dai, J. Xin, L. Zhang, Y. Wu, J. Rech, F. Zhao, T. Li, K. Liu, Q. Liu, W. Ma, W. You, C. Wang and X. Zhan, Mater. Chem. Front., 2017, Accepted Manuscript , DOI: 10.1039/C7QM00547D

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