Oligomeric Acceptor Enables High-Performance and Robust All-Polymer Solar Cells with 17.4% Efficiency

被引:12
|
作者
Li, Zhixiang [1 ,2 ,3 ]
Zhang, Zhe [1 ,2 ,3 ]
Chen, Hongbin [1 ,2 ,3 ]
Zhang, Yunxin [4 ]
Yi, Yuan-Qiu-Qiang [5 ]
Liang, Ziqi [6 ,7 ]
Zhao, Bin [6 ,7 ]
Li, Miaomiao [6 ,7 ]
Li, Chenxi [1 ,2 ,3 ]
Yao, Zhaoyang [1 ,2 ,3 ]
Wan, Xiangjian [1 ,2 ,3 ]
Kan, Bin [4 ]
Chen, Yongsheng [1 ,2 ,3 ]
机构
[1] Nankai Univ, State Key Lab, Tianjin 300071, Peoples R China
[2] Nankai Univ, Inst Elementoorgan Chem, Ctr Nanoscale Sci & Technol, Tianjin 300071, Peoples R China
[3] Nankai Univ, Renewable Energy Convers & Storage Ctr RECAST, Key Lab Funct Polymer Mat, Coll Chem, Tianjin 300071, Peoples R China
[4] Nankai Univ, Natl Inst Adv Mat, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China
[5] Chinese Acad Sci, Suzhou Inst Nanotech & Nanob, Printable Elect Res Ctr, Nano Devices & Mat Div, Suzhou 215123, Jiangsu, Peoples R China
[6] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
[7] Tianjin Univ, Tianjin Key Lab Mol Optoelect Sci, Tianjin 300072, Peoples R China
关键词
all polymer solar cells; dimer acceptors; mechanical flexibility; polymerized small molecular acceptor; ternary devices;
D O I
10.1002/aenm.202300301
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Developing efficient and stable all-polymer solar cells (all-PSCs) has received increasing attention because of their mechanical robustness for flexible devices. Based on the CH-series small molecule acceptors, a new polymer acceptor (PZC24) is reported and obtains a decent power conversion efficiency (PCE) of 16.82% when blended with PM6. To further improve the performance, an oligomeric acceptor (CH-D1), which possesses the same backbone structure as PZC24, is proposed and synthesized as the third component for all-PSC system. The creative strategy improves the crystallinity and molecular packing, and can maintain the efficient charge transport channels of the all-PSCs binary system. Therefore, the PM6:PZC24:CH-D1 based ternary devices exhibit an impressive PCE of 17.40%, among the highest value of all-PSCs. Compared to the PM6:PZC24, the ternary device exhibits enhanced photosoaking stability and thermal stability, simultaneously. In addition, the introduction of oligomeric acceptor does not weaken the mechanical robustness of all-PSCs. As such, the ternary flexible devices display an excellent PCE of 15.35%. Importantly, this strategy shows excellent universality in PM6:PY-IT and PM6:PY-V-gamma all-PSCs with improved PCEs over 17%. The results provide a feasible strategy to simultaneously improve photovoltaic efficiency and stability of all-PSCs devices and herald a bright future for all-PSCs.
引用
收藏
页数:10
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