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 language | English |
|---|---|
| Article number | 1906809 |
| Journal | Advanced Functional Materials |
| Volume | 30 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2020 Feb 1 |
Fingerprint
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 journal › Article
}
TY - JOUR
T1 - Non-Fullerene Organic Solar Cells Based on Benzo[1,2-b:4,5-b′]difuran-Conjugated Polymer with 14% Efficiency
AU - Li, Xueshan
AU - Weng, Kangkang
AU - Ryu, Hwa Sook
AU - Guo, Jing
AU - Zhang, Xuning
AU - Xia, Tian
AU - Fu, Huiting
AU - Wei, Donghui
AU - Min, Jie
AU - Zhang, Yuan
AU - Woo, Han Young
AU - Sun, Yanming
PY - 2020/2/1
Y1 - 2020/2/1
N2 - 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.
AB - 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.
KW - ambient stability
KW - benzo[1,2-b:4; 5-b′]difuran
KW - copolymer
KW - organic solar cells
KW - power conversion efficiency
UR - http://www.scopus.com/inward/record.url?scp=85075520036&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85075520036&partnerID=8YFLogxK
U2 - 10.1002/adfm.201906809
DO - 10.1002/adfm.201906809
M3 - Article
AN - SCOPUS:85075520036
VL - 30
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
IS - 6
M1 - 1906809
ER -