Citation: Yu Chen, Honggang Chen, Huilan Guan, Wei Liu, Zhe Li, Hui Liu, Yongfang Li, Yingping Zou. Ternary solvent-processed efficient organic solar cells based on a new A-DA'D-A acceptor derivative employing the 3^rd-position branching side chains on pyrroles[J]. Chinese Chemical Letters, ;2021, 32(1): 229-233. doi: 10.1016/j.cclet.2020.10.042 shu

Ternary solvent-processed efficient organic solar cells based on a new A-DA'D-A acceptor derivative employing the 3^rd-position branching side chains on pyrroles

Yu Chen ^{a, 1} ,
Honggang Chen ^{a, 1} ,
Huilan Guan ^a ,
Wei Liu ^a ,
Zhe Li ^a ,
Hui Liu ^a ,
Yongfang Li ^c ,
Yingping Zou ^{a, b, *,}

a.
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
b.
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
c.
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

yingpingzou@csu.edu.cn

Received Date: 4 October 2020
Revised Date: 24 October 2020
Accepted Date: 28 October 2020
Available Online: 29 October 2020

Figures(2)

Recent advances in non-fullerene acceptors (NFAs), typically Y6, have driven power conversion efficiency (PCE) of single-junction organic solar cells (OSCs) over 16%. Meanwhile, it becomes essential to know how to adopt simple strategies to further improve device performance. In this work, a new A-DA'D-A acceptor derivative, Y19-N3 employing 3-ethylheptyl branched at the 3^rd-position instead of 2-ethylhexyl on the pyrroles of Y19 is reported. The selection of an appropriate solvent in casting device is implemented to maximize the photovoltaic performance. PBDB-T: Y19-N3-based OSCs treated with a ternary solvent of CF/CB (1:3, v/v) and 0.8% DIO exhibit the optimal PCE of 13.77% here, with the significantly improved V_oc (0.78 V) and FF (0.72) as well as the high J_sc (24.46 mA/cm²). Further characterizations indicate that this ternary solvent-treated PBDB-T/Y19-N3 film exhibits the more appropriate morphological features with the highly efficient charge generation and collection as well as the more balanced electron and hole mobilities. This work combines molecular design and device engineering to improve the photovoltaic properties, which is important to the development of OSCs.
- Organic solar cells,
- Side chain engineering,
- Ternary solvent,
- Increased efficiency,
- Balanced mobilities
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沈阳化工大学材料科学与工程学院沈阳 110142

Ternary solvent-processed efficient organic solar cells based on a new A-DA'D-A acceptor derivative employing the 3rd-position branching side chains on pyrroles

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通讯作者: 陈斌, bchen63@163.com

Ternary solvent-processed efficient organic solar cells based on a new A-DA'D-A acceptor derivative employing the 3^rd-position branching side chains on pyrroles