Double‐Cable Conjugated Polymers with Pendent Near‐Infrared Electron Acceptors for Single‐Component Organic Solar Cells

Double‐cable conjugated polymers with near‐infrared (NIR) electron acceptors are synthesized for use in single‐component organic solar cells (SCOSCs). Through the development of a judicious synthetic pathway, the highly sensitive nature of the 2‐(3‐oxo‐2,3‐dihydroinden‐1‐ylidene)malononitrile (IC)‐b...

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Published in:Angewandte Chemie International Edition 2022-08, Vol.61 (35), p.e202209316-n/a
Main Authors: Liang, Shijie, Liu, Baiqiao, Karuthedath, Safakath, Wang, Jing, He, Yakun, Tan, Wen Liang, Li, Hao, Xu, Yunhua, Li, Ning, Hou, Jianhui, Tang, Zheng, Laquai, Frédéric, McNeill, Christopher R., Brabec, Christoph J., Li, Weiwei
Format: Article
Language:English
Subjects:
Charge efficiency
Design optimization
Double-Cable Conjugated Polymers
Electron Acceptors
Malononitrile
Near Infrared
Near infrared radiation
Photovoltaic cells
Polymers
Single Component
Solar Cells
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Summary:Double‐cable conjugated polymers with near‐infrared (NIR) electron acceptors are synthesized for use in single‐component organic solar cells (SCOSCs). Through the development of a judicious synthetic pathway, the highly sensitive nature of the 2‐(3‐oxo‐2,3‐dihydroinden‐1‐ylidene)malononitrile (IC)‐based electron acceptors in basic and protonic solvents is overcome. In addition, an asymmetric design motif is adopted to optimize the packing of donor and acceptor segments, enhancing charge separation efficiency. As such, the new double‐cable polymers are successfully applied in SCOSCs, providing an efficiency of over 10 % with a broad photo response from 300 to 850 nm and exhibiting excellent thermal/light stability. These results demonstrate the powerful design of NIR‐acceptor‐based double‐cable polymers and will enable SCOSCs to enter a new stage. Symmetric and asymmetric near‐infrared double‐cable conjugated polymers based on a non‐fused‐ring thieno[3,4‐c]pyrrole‐4,6‐dione (TPD) core with 2‐(3‐oxo‐2,3‐dihydroinden‐1‐ylidene)malononitrile (IC) side units were successfully synthesized for application in single‐component organic solar cells (SCOSCs). The asymmetric polymer exhibited improved hole mobility, leading to SCOSCs with high quantum efficiencies over 0.80 and power conversion efficiencies over 10 %.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202209316