Design and synthesis of non-fullerene acceptors based on a quinoxalineimide moiety as the central building block for organic solar cells

Two new non-fullerene acceptors, namely QIP-4F and QIP-4Cl, containing a novel imide-functionalized quinoxaline (QI) moiety fused with a thienylthiophene unit as the central building block, and fluorinated or chlorinated 2-(3-oxo-2,3-dihydro-1 H -inden-1-ylidene)malononitrile as end-capping groups,...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2020-04, Vol.56 (34), p.47-473
Main Authors: Zhu, Chunguang, An, Kang, Zhong, Wenkai, Li, Zhenye, Qian, Yu, Su, Xiaozhe, Ying, Lei
Format: Article
Language:English
Subjects:
Energy conversion efficiency
Fullerenes
Malononitrile
Open circuit voltage
Photovoltaic cells
Quinoxalines
Solar cells
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Summary:Two new non-fullerene acceptors, namely QIP-4F and QIP-4Cl, containing a novel imide-functionalized quinoxaline (QI) moiety fused with a thienylthiophene unit as the central building block, and fluorinated or chlorinated 2-(3-oxo-2,3-dihydro-1 H -inden-1-ylidene)malononitrile as end-capping groups, were designed and synthesized, respectively. An optimized device based on P2F-EHp:QIP-4Cl presented a power conversion efficiency of 13.3%, with an impressively high open-circuit voltage of 0.94 V. These results demonstrate the great potential of QI-containing fused units as central building blocks for high-performance acceptors. The imide-functionalized quinoxaline unit allows for the incorporation of an additional solubilizing group without disturbing the planar structure of the core unit.
ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc00896f