Non-Fullerene Organic Solar Cells Based on Benzo[1,2-b:4,5-b′]difuran-Conjugated Polymer with 14% Efficiency

Xueshan Li, Kangkang Weng, Hwa Sook Ryu, Jing Guo, Xuning Zhang, Tian Xia, Huiting Fu, Donghui Wei, Jie Min, Yuan Zhang, Han Young Woo, Yanming Sun

Research output: Contribution to journalArticle

Abstract

The development of high-performance donor polymers is important for obtaining high power conversion efficiencies (PCEs) of non-fullerene polymer solar cells (PSCs). Currently, most high-efficiency PSCs are fabricated with benzo[1,2-b:4,5-b′]dithiophene (BDT)-based conjugated polymers. The photovoltaic performance of benzo[1,2-b:4,5-b′]difuran (BDF)-based copolymers has lagged far behind that of BDT-based counterparts. In this study, a novel BDF-based copolymer L2 is designed and synthesized, in which BDF and benzotriazole (BTz) building blocks have been used as the electron-sufficient and deficient units, respectively. When blending with a non-fullerene small molecule acceptor (SMA), TTPT-T-4F, the L2-based device exhibits a remarkably high PCE of 14.0%, which is higher than that of the device fabricated by its analogue BDT copolymer (12.72%). Moreover, PSCs based on the L2:TTPT-T-4F blend demonstrate excellent ambient stability with 92% of its original PCE remaining after storage in air for 1800 h. Thus, BDF is a promising electron-donating unit, and the BDF-based copolymers can be competitive or even surpass the performance of BDT-based counterparts.

Original languageEnglish
Article number1906809
JournalAdvanced Functional Materials
Volume30
Issue number6
DOIs
Publication statusPublished - 2020 Feb 1

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Conjugated polymers
Copolymers
solar cells
Conversion efficiency
copolymers
polymers
Electrons
Polymers
electrons
Molecules
N-((2,3-dihydro-1,4-benzodioxin-2-yl)methyl)-5-methoxy-1H-indole-3-ethanamine
Organic solar cells
analogs
Air
air
Polymer solar cells
molecules

Keywords

  • ambient stability
  • benzo[1,2-b:4; 5-b′]difuran
  • copolymer
  • organic solar cells
  • power conversion efficiency

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Non-Fullerene Organic Solar Cells Based on Benzo[1,2-b:4,5-b′]difuran-Conjugated Polymer with 14% Efficiency. / Li, Xueshan; Weng, Kangkang; Ryu, Hwa Sook; Guo, Jing; Zhang, Xuning; Xia, Tian; Fu, Huiting; Wei, Donghui; Min, Jie; Zhang, Yuan; Woo, Han Young; Sun, Yanming.

In: Advanced Functional Materials, Vol. 30, No. 6, 1906809, 01.02.2020.

Research output: Contribution to journalArticle

Li, X, Weng, K, Ryu, HS, Guo, J, Zhang, X, Xia, T, Fu, H, Wei, D, Min, J, Zhang, Y, Woo, HY & Sun, Y 2020, 'Non-Fullerene Organic Solar Cells Based on Benzo[1,2-b:4,5-b′]difuran-Conjugated Polymer with 14% Efficiency', Advanced Functional Materials, vol. 30, no. 6, 1906809. https://doi.org/10.1002/adfm.201906809
Li, Xueshan ; Weng, Kangkang ; Ryu, Hwa Sook ; Guo, Jing ; Zhang, Xuning ; Xia, Tian ; Fu, Huiting ; Wei, Donghui ; Min, Jie ; Zhang, Yuan ; Woo, Han Young ; Sun, Yanming. / Non-Fullerene Organic Solar Cells Based on Benzo[1,2-b:4,5-b′]difuran-Conjugated Polymer with 14% Efficiency. In: Advanced Functional Materials. 2020 ; Vol. 30, No. 6.
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abstract = "The development of high-performance donor polymers is important for obtaining high power conversion efficiencies (PCEs) of non-fullerene polymer solar cells (PSCs). Currently, most high-efficiency PSCs are fabricated with benzo[1,2-b:4,5-b′]dithiophene (BDT)-based conjugated polymers. The photovoltaic performance of benzo[1,2-b:4,5-b′]difuran (BDF)-based copolymers has lagged far behind that of BDT-based counterparts. In this study, a novel BDF-based copolymer L2 is designed and synthesized, in which BDF and benzotriazole (BTz) building blocks have been used as the electron-sufficient and deficient units, respectively. When blending with a non-fullerene small molecule acceptor (SMA), TTPT-T-4F, the L2-based device exhibits a remarkably high PCE of 14.0{\%}, which is higher than that of the device fabricated by its analogue BDT copolymer (12.72{\%}). Moreover, PSCs based on the L2:TTPT-T-4F blend demonstrate excellent ambient stability with 92{\%} of its original PCE remaining after storage in air for 1800 h. Thus, BDF is a promising electron-donating unit, and the BDF-based copolymers can be competitive or even surpass the performance of BDT-based counterparts.",
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AU - Xia, Tian

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AU - Wei, Donghui

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