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Issue 42, 2017
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Enhanced performance of polymer solar cells based on PTB7-Th:PC71BM by doping with 1-bromo-4-nitrobenzene

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Abstract

Organic solar cells (OSCs) have emerged as an attractive strategy to efficiently convert light energy into electricity. In this study, the third component 1-bromo-4-nitrobenzene (C6H4BrNO2) was introduced into the active layer of PTB7-Th:PC71BM to promote exciton separation and speed up electron transfer. A PCE of 8.95% was achieved for polymer solar cells (PSCs) with 15 wt% C6H4BrNO2, which is an 18% enhancement in PCE compared with binary OSCs based on PTB7-Th:PC71BM. Atomic force microscopy (AFM) measurements indicated that the ideal morphology can be formed. The charge generation properties were studied in terms of internal quantum efficiency (IQE) and photocurrent density (Jph), revealing that charge transport was facilitated significantly, which favors higher JSC and FF.

Graphical abstract: Enhanced performance of polymer solar cells based on PTB7-Th:PC71BM by doping with 1-bromo-4-nitrobenzene

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Publication details

The article was received on 05 Sep 2017, accepted on 05 Oct 2017 and first published on 06 Oct 2017


Article type: Paper
DOI: 10.1039/C7TC04062H
Citation: J. Mater. Chem. C, 2017,5, 10985-10990
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    Enhanced performance of polymer solar cells based on PTB7-Th:PC71BM by doping with 1-bromo-4-nitrobenzene

    R. Fan, Z. Huai, Y. Sun, X. Li, G. Fu, S. Huang, L. Wang and S. Yang, J. Mater. Chem. C, 2017, 5, 10985
    DOI: 10.1039/C7TC04062H

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