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Issue 16, 2018
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A universal nonfullerene electron acceptor matching with different band-gap polymer donors for high-performance polymer solar cells

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Abstract

Unlike fullerene derivatives, current nonfullerene n-type organic semiconductor (n-OS) electron acceptors can rarely work efficiently with different band-gap polymer donors in polymer solar cells (PSCs). To address this issue, we designed and synthesized a new n-OS electron acceptor, namely m-MeIC, which is proved to be effective with different band-gap polymer donors including wide band-gap J71, medium band-gap PBDB-T and low band-gap PCE-10. Photovoltaic devices based on J71:m-MeIC and PBDB-T:m-MeIC achieved power conversion efficiencies (PCEs) as high as 12.08% and 10.93%, respectively. The difference in PCEs between the devices based on J71 and PBDB-T is mainly ascribed to the gap of the open circuit voltage. It should be mentioned that the J71-based device exhibited an energy loss of 0.62 eV, which is significantly lower than the most reported energy loss. For the low band-gap polymer donor PCE-10, the device also showed a relatively high PCE of 8.34%. The different device performances are analyzed in depth from charge transport and collection, to recombination loss mechanism and morphology of blend films. This work reveals that the new n-type organic semiconductor is very promising as a universal nonfullerene acceptor, pairing with different band-gap polymer donors.

Graphical abstract: A universal nonfullerene electron acceptor matching with different band-gap polymer donors for high-performance polymer solar cells

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Publication details

The article was received on 28 Dec 2017, accepted on 19 Mar 2018 and first published on 20 Mar 2018


Article type: Paper
DOI: 10.1039/C7TA11339K
Citation: J. Mater. Chem. A, 2018,6, 6874-6881
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    A universal nonfullerene electron acceptor matching with different band-gap polymer donors for high-performance polymer solar cells

    Z. Luo, G. Li, W. Gao, K. Wu, Z. Zhang, B. Qiu, H. Bin, L. Xue, F. Liu, Y. Li and C. Yang, J. Mater. Chem. A, 2018, 6, 6874
    DOI: 10.1039/C7TA11339K

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