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Issue 7, 2016
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Side-chain manipulation on accepting units of two-dimensional benzo[1,2-b:4,5-b′]dithiophene polymers for organic photovoltaics

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Abstract

Two donor–acceptor alternating polymers of bis(octylthio)thienyl benzo[1,2-b:4,5-b′]dithiophene (BDTTs) and fluorinated benzo[c][1,2,5]thiadiazole (fBT) or 5-dodecylthienyl-6-fluorobenzo[c][1,2,5]thiadiazole were designed for organic photovoltaic applications. The polymers displayed strong absorptions in the range of 300–650 nm and bandgaps of ∼1.60 eV. Bulk-heterojunction solar cells of PBDTTs-fBT and (6,6)-phenyl C71-butyric acid methyl ester (PC71BM) blends exhibited a maximum power conversion efficiency of 6.27%. Experimental results and theoretical modelling were correlated to reveal the impact of substitution on fluorinated BT on the optoelectronic properties of the resulting polymers.

Graphical abstract: Side-chain manipulation on accepting units of two-dimensional benzo[1,2-b:4,5-b′]dithiophene polymers for organic photovoltaics

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Publication details

The article was received on 09 Oct 2015, accepted on 25 Dec 2015 and first published on 28 Dec 2015


Article type: Paper
DOI: 10.1039/C5PY01632K
Citation: Polym. Chem., 2016,7, 1486-1493

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    Side-chain manipulation on accepting units of two-dimensional benzo[1,2-b:4,5-b′]dithiophene polymers for organic photovoltaics

    Z. Xu, G. Luo, J. Yu, X. Yin, E. Zhu, F. Zhang, H. Wu and W. Tang, Polym. Chem., 2016, 7, 1486
    DOI: 10.1039/C5PY01632K

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