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Insertion of double bond π-bridges of A-D-A acceptor for high performance near-infrared polymer solar cells

Abstract

Double bond π-bridges were introduced into A-D-A structured n-type organic semiconductor (n-OS) IDT-IC and synthesized a new n-OS acceptor SJ-IC. In comparison with IDT-IC, SJ-IC film shows significantly red-shifted absorption, improved electron mobility and tuned crystallinity, which makes its blend film with polymer donor easier to form appropriate phase separation. The polymer solar cells with polymer J61 as donor and SJ-IC as acceptor demonstrated a higher PCE of 9.27% with a higher Jsc of 16.99 mA/cm2, while the device based on J61/IDT-IC only delivered a PCE of 6.95% with a Jsc of 13.70 mA/cm2, which should be ascribed to the red-shifted and broadened absorption of SJ-IC. Therefore, inserting the double bond π-bridges in the n-OS acceptor molecules is a simple and effective way to broaden and red-shifted its absorption to improve its photovoltaic performance. In addition, the near-infrared absorption of the SJ-IC acceptor should be beneficial to the future application in semitransparent and tandem PSCs.

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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, Accepted Manuscript
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    Insertion of double bond π-bridges of A-D-A acceptor 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, Accepted Manuscript , DOI: 10.1039/C7TA07049G

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