Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells

Hang Wang; Hao Lu; Ya-Nan Chen; Andong Zhang; Yuqiang Liu; Cai'e Zhang; Yahui Liu; Xinjun Xu; Zhishan Bo

doi:10.1007/s10118-022-2796-z

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Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells

RESEARCH ARTICLE | Updated：2022-07-21

- Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells
- Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells
- Chinese Journal of Polymer Science 2022年40卷第8期页码：996-1002
- Affiliations：
  
  a.College of Textiles & Clothing, State Key Laboratory of Bio-fibers and Eco-textiles, Qingdao University, Qingdao 266071, China
  b.Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
  c.College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
- Author bio：
  
  liuyh@qdu.edu.cn (Y.L)
  zsbo@bnu.edu.cn (Z.B)
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51933001 and 22109080).
- DOI：10.1007/s10118-022-2796-z
  中图分类号：
- 收稿：2022-04-16，
  
  修回：2022-5-5，
  
  录用：2022-5-7，
  
  网络首发：2022-06-22，
  
  纸质出版：2022-08-01
- Accepted：
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Wang, H.; Lu, H.; Chen, Y. N.; Zhang, A.; Liu, Y.; Zhang, C.; Liu, Y.; Xu, X.; Bo, Z. Effect of polymer chain regularity on the photovoltaic performance of organic solar cells. Chinese J. Polym. Sci. 2022, 40, 996–1002

Hang Wang, Hao Lu, Ya-Nan Chen, et al. Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells[J]. Chinese Journal of Polymer Science, 2022, 40(8): 996-1002.
Wang, H.; Lu, H.; Chen, Y. N.; Zhang, A.; Liu, Y.; Zhang, C.; Liu, Y.; Xu, X.; Bo, Z. Effect of polymer chain regularity on the photovoltaic performance of organic solar cells. Chinese J. Polym. Sci. 2022, 40, 996–1002 DOI： 10.1007/s10118-022-2796-z.

Hang Wang, Hao Lu, Ya-Nan Chen, et al. Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells[J]. Chinese Journal of Polymer Science, 2022, 40(8): 996-1002. DOI： 10.1007/s10118-022-2796-z.

摘要

The BDT based regio-regular polymer

reg-PTF

and the corresponding random polymer

ran-PTF

are developed as donor materials. Acceptors with different energy level are severally match with the two polymers can give the significant different PCE due to the different energy level offset between the donor and acceptor materials.

Abstract

In this work

regio-regular and random polymers (

reg-PTF

and

ran-PTF

) comprising benzodithiophene and 3-fluorothiophene units are developed to investigate the influence of polymer chain regularity on the photovoltaic performance. Interestingly

reg-PTF

exhibits higher HOMO energy level (~0.2 eV) than that of

ran-PTF

due to the more ordered molecular structure and higher crystallization. As the result

the HOMO energy level offset between donor and acceptor can be well controlled by selecting different acceptors. Using BTP-ec9-4F with a much deep HOMO energy level as acceptor

reg-PTF

-based devices display an inferior PCE of 7.66% compared with

ran-PTF

based ones (11.78%) due to the too large HOMO energy levels offset. When blending with Y18-1F

the PCE of

reg-PTF

-based devices is increased to 13.23% due to the appropriate energy level. In comparison

the

ran-PTF

-based devices nearly do not work because of the negative HOMO energy levels offset. This work indicates that both the polymer chain regularity and the energy level offset between the donor and acceptor material are important to the performance of organic solar cells.

关键词

Keywords

references

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