Unsymmetric Side Chains of Indacenodithiophene Copolymers Lead to Improved Packing and Device Performance

Ying Yang; Tong Shan; Jian Cao; Hua-Chun Wang; Ji-Kang Wang; Hong-Liang Zhong; Yun-Xiang Xu

doi:10.1007/s10118-020-2342-9

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Unsymmetric Side Chains of Indacenodithiophene Copolymers Lead to Improved Packing and Device Performance

ARTICLE | Updated：2019-10-24

- Unsymmetric Side Chains of Indacenodithiophene Copolymers Lead to Improved Packing and Device Performance
- Chinese Journal of Polymer Science Vol. 38, Issue 4, Pages: 342-348(2020)
- Affiliations：
  
  a.College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
  b.School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Author bio：
  
  hlzhong@sjtu.edu.cn (H.L.Z.)
  yxxu@scu.edu.cn (Y.X.X.)
- Funds：
- DOI：10.1007/s10118-020-2342-9
  CLC：
- Received：23 July 2019，
  
  Revised：2019-8-20，
  
  Accepted：21 August 2019，
  
  Online First：24 October 2019，
  
  Published：2020-04
- Accepted：
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Yang, Y.; Shan, T.; Cao, J.; Wang, H. C.; Wang, J. K.; Zhong, H. L.; Xu, Y. X. Unsymmetric side chains of indacenodithiophene copolymers lead to improved packing and device performance. Chinese J. Polym. Sci. 2020, 38, 342–348

Ying Yang, Tong Shan, Jian Cao, et al. Unsymmetric Side Chains of Indacenodithiophene Copolymers Lead to Improved Packing and Device Performance[J]. Chinese Journal of Polymer Science, 2020, 38(4): 342-348.
Yang, Y.; Shan, T.; Cao, J.; Wang, H. C.; Wang, J. K.; Zhong, H. L.; Xu, Y. X. Unsymmetric side chains of indacenodithiophene copolymers lead to improved packing and device performance. Chinese J. Polym. Sci. 2020, 38, 342–348 DOI： 10.1007/s10118-020-2342-9.

Ying Yang, Tong Shan, Jian Cao, et al. Unsymmetric Side Chains of Indacenodithiophene Copolymers Lead to Improved Packing and Device Performance[J]. Chinese Journal of Polymer Science, 2020, 38(4): 342-348. DOI： 10.1007/s10118-020-2342-9.

摘要

Abstract

Two conjugated polymers (PuIDTBD and PuIDTQ) with unsymmetric side chains have been prepared for polymer solar cells using two other polymers (PIDTBD and PIDTQ) with symmetric side chains as control compounds. The combination of methyl and 4-hexylphenyl side chains on the same bridged carbon can ensure good solubility

decrease

stacking distances

and bring proper miscibility with PC

BM simultaneously. Therefore

the corresponding polymer solar cells (PSCs) based on donor polymers with unsymmetric side chains exhibited enhanced short-circuit current density (

) and power conversion efficiency (PCE) compared with those of control polymers. The PIDTBD and PIDTQ based devices possessed low PCE of 2.13% and 1.48%

while PCEs of devices based on PuIDTBD and PuIDTQ were improved to 3.93% and 4.12%

respectively. The results demonstrate that unsymmetric side chain engineering of conjugated polymers is an effective approach to achieve high performance PSCs.

关键词

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references

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