Benzo[1,2-b:4,5-b’]difuran-based Narrow Bandgap Polymers for Efficient Organic Solar Cells Using Perylene Diimides-type Nonfullerene Acceptors

Zhen-Yu Wu; Jun-Feng Liu; Xin-Zhu Tong; Yan-Jie Sun; Xun-Chang Wang; Ren-Qiang Yang; Xiang Gao; Ming Shao; Peng-Cheng Li; Zhi-Tian Liu

doi:10.1007/s10118-025-3318-6

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Benzo[1,2-b:4,5-b’]difuran-based Narrow Bandgap Polymers for Efficient Organic Solar Cells Using Perylene Diimides-type Nonfullerene Acceptors

RESEARCH ARTICLE | Updated：2025-07-14

- Benzo[1,2-b:4,5-b’]difuran-based Narrow Bandgap Polymers for Efficient Organic Solar Cells Using Perylene Diimides-type Nonfullerene Acceptors
- Chinese Journal of Polymer Science Vol. 43, Issue 5, Pages: 711-717(2025)
- Affiliations：
  
  a.Institute of Materials for Optoelectronics and New Energy, Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
  b.Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
  c.Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan 430056, China
- Author bio：
  
  witxgao@126.com; xgao@wit.edu.cn (X.G.)
  mingshao@hust.edu.cn (M.S.)
  able.ztliu@wit.edu.cn (Z.T.L.)
- Funds：
- DOI：10.1007/s10118-025-3318-6
  CLC：
- Received：07 December 2024，
  
  Revised：2025-01-25，
  
  Accepted：10 February 2025，
  
  Online First：03 April 2025，
  
  Published：30 April 2025
- Accepted：
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Wu, Z. Y.; Liu, J. F.; Tong, X. Z.; Sun, Y. J.; Wang, X. C.; Yang, R. Q.; Gao, X.; Shao, M.; Li, P. C.; Liu, Z. T. Benzo[1,2-b:4,5-b’]difuran-based narrow bandgap polymers for efficient organic solar cells using perylene diimides-type nonfullerene acceptors. Chinese J. Polym. Sci. 2025, 43, 711–717

Zhen-Yu Wu, Jun-Feng Liu, Xin-Zhu Tong, et al. Benzo[1,2-b:4,5-b’]difuran-based Narrow Bandgap Polymers for Efficient Organic Solar Cells Using Perylene Diimides-type Nonfullerene Acceptors[J]. Chinese Journal of Polymer Science, 2025, 43(5): 711-717.
Wu, Z. Y.; Liu, J. F.; Tong, X. Z.; Sun, Y. J.; Wang, X. C.; Yang, R. Q.; Gao, X.; Shao, M.; Li, P. C.; Liu, Z. T. Benzo[1,2-b:4,5-b’]difuran-based narrow bandgap polymers for efficient organic solar cells using perylene diimides-type nonfullerene acceptors. Chinese J. Polym. Sci. 2025, 43, 711–717 DOI： 10.1007/s10118-025-3318-6.

Zhen-Yu Wu, Jun-Feng Liu, Xin-Zhu Tong, et al. Benzo[1,2-b:4,5-b’]difuran-based Narrow Bandgap Polymers for Efficient Organic Solar Cells Using Perylene Diimides-type Nonfullerene Acceptors[J]. Chinese Journal of Polymer Science, 2025, 43(5): 711-717. DOI： 10.1007/s10118-025-3318-6.

摘要

Two narrow-bandgap polymers

PBDF and PBDFCl

were synthesized

exhibiting red-shifted absorption

lower the highest occupied molecular orbital level and stronger aggregation than thiophene analogues. The power conversion efficiency of PBDFCl:Ph(PDI)

-based organic solar cells was 8.84%

much higher than PCE10-based ones (6.09%)

among the top performing ones that utilize PDI-based acceptors.

Abstract

The development of narrow-bandgap polymer donors with complementary absorption and matched energy levels for perylene diimides (PDI)-based nonfullerene acceptors (NFAs) has received little attention. The high-lying highest occupied molecular orbital (HOMO) level and low degree of crystallinity of the star donor polymer PCE10 limit its application in PDI-based Organic solar cells (OSCs). In this study

two benzo[1

2-b:4

5-b′

]

difuran (BDF)-based narrow-bandgap polymer donors

PBDF and PBDFCl

were synthesized to improve the photovoltaic performance of PDI-based OSCs. The smaller BDF moiety with higher electronegativity endows the resulting polymers with stronger aggregation and lower HOMO energy levels. The power conversion efficiency (PCE) value of the PBDF:Ph(PDI)

-based OSCs was 7.24%

which is much higher than that of PCE10-based OSCs (6.09%). Further chlorination of the conjugated side chain elevated the PCE to 8.84%

which is 1.4 times higher than that of PCE10-based OSCs. These results demonstrate the significant contribution of designing novel narrow-bandgap polymer donors to boost the PCE of PDI-based OSCs and highlight the importance of matching the aggregation behaviors of polymeric donor materials with that of NFAs.

关键词

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references

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