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Issue 34, 2018
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Efficient and thermally stable all-polymer solar cells based on a fluorinated wide-bandgap polymer donor with high crystallinity

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Abstract

All-polymer solar cells (all-PSCs) based on an n-type polymer as an acceptor material and a p-type polymer as a donor material have attracted great attention due to their excellent device stability. However, a systematic study of the thermal stability of all-PSCs has not been reported to date. Herein, we developed a highly efficient and thermally stable all-PSCs based on a fluorinated wide-bandgap polymer donor (PFBZ) and a narrow-bandgap polymer acceptor (N2200). The PFBZ:N2200 pair exhibited complementary absorption spectra, matched energy levels, and good blend morphology. As a result, PFBZ:N2200-based devices after thermal annealing at 150 °C for 15 min achieved a high power conversion efficiency (PCE) of 8.1% with a high open-circuit voltage of 0.90 V, a short-circuit current density of 13.5 mA cm−2, a fill factor of 67.0%, as well as a low energy loss of 0.56 eV. The efficiency of 8.1% is one of the highest values reported for the additive-free all-PSCs. When the thermal annealing time was extended to 180 min or the temperature was increased to 250 °C, the all-PSCs retained a high PCE of over 7%. These results indicate that the PFBZ:N2200-based all-PSCs with high efficiency and excellent thermal stability are promising candidates for the practical applications of OSCs.

Graphical abstract: Efficient and thermally stable all-polymer solar cells based on a fluorinated wide-bandgap polymer donor with high crystallinity

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Publication details

The article was received on 06 Jun 2018, accepted on 10 Jul 2018 and first published on 31 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA05376F
Citation: J. Mater. Chem. A, 2018,6, 16403-16411
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    Efficient and thermally stable all-polymer solar cells based on a fluorinated wide-bandgap polymer donor with high crystallinity

    W. Su, Y. Meng, X. Guo, Q. Fan, M. Zhang, Y. Jiang, Z. Xu, Y. Dai, B. Xie, F. Liu, M. Zhang, T. P. Russell and Y. Li, J. Mater. Chem. A, 2018, 6, 16403
    DOI: 10.1039/C8TA05376F

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