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Non‐Fullerene Acceptors With A 2 = A 1 ‐D‐A 1 = A 2 Skeleton Containing Benzothiadiazole and Thiazolidine‐2,4‐Dione for High‐Performance P3HT‐Based Organic Solar Cells (Solar RRL 11∕2017)
Author(s) -
Xiao Bo,
Tang Ailing,
Cheng Linxiu,
Zhang Jianqi,
Wei Zhixiang,
Zeng Qingdao,
Zhou Erjun
Publication year - 2017
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201770142
Subject(s) - photovoltaic system , thiazolidine , homo/lumo , carbon skeleton , molecule , materials science , fullerene , organic solar cell , energy conversion efficiency , skeleton (computer programming) , photochemistry , polymer , chemistry , optoelectronics , organic chemistry , computer science , electrical engineering , composite material , programming language , engineering
Benzothiadiazole (BT) is one of the widely‐used electron‐accepting building blocks for photovoltaic solar cells. When combined with the classic P3HT donor, BT‐based polymer acceptors demonstrate high V OC but low PCE, while the double‐BT based small molecules achieve high PCE but low V OC . Here (article Nr. solr. 201700166 ), small molecule acceptors (SMAs), BT2 and BT2b, with A 2 =A 1 ‐D‐A 1 =A 2 skeleton are designed and synthesized using indacenodithiophene (IDT), benzothiadiazole (BT), and thiazolidine‐2,4‐dione (TD) as central donor units. The resulting BT2 and BT2b small molecule acceptors demonstrate high LUMO energy levels and the P3HT:BT2b based solar cell could simultaneously achieve a high V OC of 0.92 V and a promising PCE of 6.08%.