A Near-infrared Non-fullerene Acceptor with Thienopyrrole-expanded Benzo[1,2-<italic style="font-style: italic">b</italic>:4,5-<italic style="font-style: italic">b</italic>′]dithiophene Core for Polymer Solar Cells

Zhen Chen; Shan-Shan Ma; Kai Zhang; Zhi-Cheng Hu; Qing-Wu Yin; Fei Huang; Yong Cao

doi:10.1007/s10118-020-2440-8

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A Near-infrared Non-fullerene Acceptor with Thienopyrrole-expanded Benzo[1,2-b:4,5-b′]dithiophene Core for Polymer Solar Cells

ARTICLE | Updated：2020-06-30

- A Near-infrared Non-fullerene Acceptor with Thienopyrrole-expanded Benzo[1,2-b:4,5-b′]dithiophene Core for Polymer Solar Cells
- Chinese Journal of Polymer Science Vol. 39, Issue 1, Pages: 35-42(2021)
- Affiliations：
  
  Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
- Author bio：
  
  mszhangk@scut.edu.cn (K.Z.)
  msfhuang@scut.edu.cn (F.H.)
- Funds：
- DOI：10.1007/s10118-020-2440-8
  CLC：
- Received：18 March 2020，
  
  Revised：2020-4-3，
  
  Accepted：06 April 2020，
  
  Online First：30 June 2020，
  
  Published：01 January 2021
- Accepted：
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Chen, Z.; Ma, S. S.; Zhang, K.; Hu, Z. C.; Yin, Q. W.; Huang, F.; Cao, Y. A near-infrared non-fullerene acceptor with thienopyrrole-expanded benzo[1,2-, b,:4,5-, b,′]dithiophene core for polymer solar cells. Chinese J. Polym. Sci. 2021, 39, 35–42

Zhen Chen, Shan-Shan Ma, Kai Zhang, et al. A Near-infrared Non-fullerene Acceptor with Thienopyrrole-expanded Benzo[1,2-b:4,5-b′]dithiophene Core for Polymer Solar Cells[J]. Chinese Journal of Polymer Science, 2021, 39(1): 35-42. DOI: 10.1007/s10118-020-2440-8.
Chen, Z.; Ma, S. S.; Zhang, K.; Hu, Z. C.; Yin, Q. W.; Huang, F.; Cao, Y. A near-infrared non-fullerene acceptor with thienopyrrole-expanded benzo[1,2-, b,:4,5-, b,′]dithiophene core for polymer solar cells. Chinese J. Polym. Sci. 2021, 39, 35–42 DOI： 10.1007/s10118-020-2440-8.

Zhen Chen, Shan-Shan Ma, Kai Zhang, et al. A Near-infrared Non-fullerene Acceptor with Thienopyrrole-expanded Benzo[1,2-b:4,5-b′]dithiophene Core for Polymer Solar Cells[J]. Chinese Journal of Polymer Science, 2021, 39(1): 35-42. DOI: 10.1007/s10118-020-2440-8. DOI：

摘要

Abstract

A near-infrared non-fullerene acceptor (NFA) BDTIC

based on thienopyrrole-expanded benzo[1

′]dithiophene unit (heptacyclic

-heteroacene) as core

is designed and synthesized. The aromatic pyrrole ring with strong electron-donating ability in the core enhances the intramolecular charge transfer effect

finely tunes the optical bandgap and absorption profile of BDTIC

and thus results in a narrowed optical bandgap (

$$E_{\rm{g}}^{\rm{opt}}$$

http://notExist.jpg

) of 1.38 eV and a near-infrared absorption to 900 nm. When BDTIC is paired with donor polymer PBDB-T to fabricate organic solar cells

the optimized device achieves a best power conversion efficiency of 12.1% with a short-circuit current density of 20.0 mA·cm

–2

and an open-circuit voltage of 0.88 V. The photovoltaic performance benefits from the broad absorption

weak bimolecular recombination

efficient charge separation and collection

and favorable blend morphology. This work demonstrates that thienopyrrole-expanded benzo[1

′]dithiophene unit (heptacyclic

-heteroacene) is a promising building unit to construct high-performance NFAs by enhancing the intramolecular charge transfer effect

broadening absorption as well as maintaining good intermolecular stacking property.

关键词

Keywords

references

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⁰

A Near-infrared Non-fullerene Acceptor with Thienopyrrole-expanded Benzo[1,2-b:4,5-b′]dithiophene Core for Polymer Solar Cells

DOI：10.1007/s10118-020-2440-8

摘要

Abstract

关键词

Keywords

references