Efficient organic solar cells with benzobphenazine-core acceptors: insights into the effects of halogenation

A series of new small-molecule acceptors-NA9, NA10, and NA11-based on benzo[b]phenazine are synthesized. The chlorinated NA10 and brominated NA11 exhibit improved molecular packing and enhanced charge transport, resulting in higher power conversion efficiencies (PCEs) of 15.65% and 16.64%, respectiv...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2024-12, Vol.60 (98), p.14656
Main Authors: Tian, Han, Sun, Kangbo, Wang, Yufei, Chen, Zhanxiang, Zhang, Guangye, Luo, Zhenghui
Format: Article
Language:English
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Summary:A series of new small-molecule acceptors-NA9, NA10, and NA11-based on benzo[b]phenazine are synthesized. The chlorinated NA10 and brominated NA11 exhibit improved molecular packing and enhanced charge transport, resulting in higher power conversion efficiencies (PCEs) of 15.65% and 16.64%, respectively, compared to 11.66% for the non-halogenated NA9. These results underscore the great potential of peripheral halogenation particularly bromination, in achieving high-performance OSCs.A series of new small-molecule acceptors-NA9, NA10, and NA11-based on benzo[b]phenazine are synthesized. The chlorinated NA10 and brominated NA11 exhibit improved molecular packing and enhanced charge transport, resulting in higher power conversion efficiencies (PCEs) of 15.65% and 16.64%, respectively, compared to 11.66% for the non-halogenated NA9. These results underscore the great potential of peripheral halogenation particularly bromination, in achieving high-performance OSCs.
ISSN:1364-548X
1364-548X
DOI:10.1039/d4cc05634e