

FOLLOWUS
a.State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
b.South China Institute of Collaborative Innovation, Dongguan 523808, China
† These authors contributed equally to this work
msfhuang@scut.edu.cn
Received:26 July 2018,
Revised:2018-9-4,
Accepted:11 September 2018,
Online First:10 October 2018,
Published:2019-01
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Citation: Liu, X. C.; Yin, Q. W.; Hu, Z. C.; Wang, Z. F.; Huang, F.; Cao, Y. Perylene diimide based isomeric conjugated polymers as efficient electron acceptors for all-polymer solar cells. Chinese J. Polym. Sci. 2019, 37, 18–27
Xiao-Cheng Liu, Qing-Wu Yin, Zhi-Cheng Hu, et al. Perylene Diimide Based Isomeric Conjugated Polymers as Efficient Electron Acceptors for All-polymer Solar Cells[J]. Chinese Journal of Polymer Science, 2019, 37(1): 18-27.
Citation: Liu, X. C.; Yin, Q. W.; Hu, Z. C.; Wang, Z. F.; Huang, F.; Cao, Y. Perylene diimide based isomeric conjugated polymers as efficient electron acceptors for all-polymer solar cells. Chinese J. Polym. Sci. 2019, 37, 18–27 DOI: 10.1007/s10118-019-2188-1.
Xiao-Cheng Liu, Qing-Wu Yin, Zhi-Cheng Hu, et al. Perylene Diimide Based Isomeric Conjugated Polymers as Efficient Electron Acceptors for All-polymer Solar Cells[J]. Chinese Journal of Polymer Science, 2019, 37(1): 18-27. DOI: 10.1007/s10118-019-2188-1.
We present here a series of perylene diimide (PDI) based isomeric conjugated polymers for the application as efficient electron acceptors in all-polymer solar cells (all-PSCs). By copolymerizing PDI monomers with 1
4-diethynylbenzene (
para
-linkage) and 1
3-diethynylbenzene (
meta
-linkage)
isomeric PDI based conjugated polymers with parallel and non-parallel PDI units inside backbones were obtained. It was found that
para
-linked conjugated polymer (PA) showed better solubility
stronger
π-π
stacking
more favorable blend morphology
and better photovoltaic performance than those of
meta
-linked conjugated polymers (PM) did. Device based on PTB7-Th:PA (PTB7-Th:poly{4
8-bis[5-(2-ethylhexyl)-thiophen-2-yl]benzo[1
2-b:4
5-
b
']dithiophene-2
6-diyl-
alt
-3-fluoro-2-[(2-ethylhexyl)-carbonyl]thieno[3
4-
b
]thiophene-4
6-diyl}) showed significantly enhanced photovoltaic performance than that of PTB7-Th:MA (3.29% versus 0.92%). Moreover
the photovoltaic performance of these polymeric acceptors could be further improved
via
a terpolymeric strategy. By copolymerizing a small amount of
meta
-linkages into PA
the optimized terpolymeric acceptors enabled to enhance photovoltaic performance with improved the short-circuit current density (
J
sc
) and fill factor (FF)
resulting in an improved power conversion efficiency (PCE) of 4.03%.
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