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Issue 43, 2017
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Insertion of double bond π-bridges of A–D–A acceptors for high performance near-infrared polymer solar cells

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Abstract

Double bond π-bridges were introduced into an A–D–A structured n-type organic semiconductor (n-OS) IDT-IC and a new n-OS acceptor SJ-IC was synthesized. In comparison with IDT-IC, the SJ-IC film shows significantly red-shifted absorption, improved electron mobility and tuned crystallinity, which make its blend film with a polymer donor easier to form appropriate phase separation. The polymer solar cells with polymer J61 as a donor and SJ-IC as an acceptor demonstrated a higher PCE of 9.27% with a higher Jsc of 16.99 mA cm−2, while the device based on J61/IDT-IC only delivered a PCE of 6.95% with a Jsc of 13.70 mA cm−2, which should be ascribed to the red-shifted and broadened absorption of SJ-IC. Therefore, inserting double bond π-bridges into n-OS acceptor molecules is a simple and effective way to broaden and red-shift their absorption to improve their photovoltaic performance. In addition, the near-infrared absorption of the SJ-IC acceptor should be beneficial to its future application in semitransparent and tandem PSCs.

Graphical abstract: Insertion of double bond π-bridges of A–D–A acceptors for high performance near-infrared polymer solar cells

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Publication details

The article was received on 10 Aug 2017, accepted on 01 Oct 2017 and first published on 03 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA07049G
Citation: J. Mater. Chem. A, 2017,5, 22588-22597
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    Insertion of double bond π-bridges of A–D–A acceptors for high performance near-infrared polymer solar cells

    X. Li, T. Yan, H. Bin, G. Han, L. Xue, F. Liu, Y. Yi, Z. Zhang, T. P. Russell and Y. Li, J. Mater. Chem. A, 2017, 5, 22588
    DOI: 10.1039/C7TA07049G

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