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Title
Japanese:Dioxaborin Compounds with Terminal Carbazole Groups: Enhancing Electron Acceptor in Organic Photovoltaics 
English:Dioxaborin Compounds with Terminal Carbazole Groups: Enhancing Electron Acceptor in Organic Photovoltaics 
Author
Japanese: Hironori Kobayashi, 伊澤誠一郎, Chitoshi Kitamura, Masahiro Hiramoto, Katsuhiko Ono.  
English: Hironori Kobayashi, Seiichiro Izawa, Chitoshi Kitamura, Masahiro Hiramoto, Katsuhiko Ono.  
Language English 
Journal/Book name
Japanese:Asian Journal of Organic Chemistry 
English:Asian Journal of Organic Chemistry 
Volume, Number, Page        
Published date Oct. 2023 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://dx.doi.org/10.1002/ajoc.202300377
 
DOI https://doi.org/10.1002/ajoc.202300377
Abstract <jats:title>Abstract</jats:title><jats:p>Three donor−acceptor−donor dioxaborin compounds containing carbazoles as the terminal electron donor groups were synthesized. Their electronic and photovoltaic properties were compared with those of an analog with terminal triphenylamine groups. The HOMO and LUMO levels of the <jats:italic>N</jats:italic>‐phenylcarbazole derivative were 0.3 and 0.1 eV lower, respectively, than those of the triphenylamine analog. During the evaluation of organic photovoltaic characteristics, the <jats:italic>N</jats:italic>‐phenylcarbazole derivative exhibited a power conversion efficiency (PCE) of 2.06 % when combined with a conducting polymer (PTB7‐Th). Contrarily, the triphenylamine analog exhibited a PCE of 2.85 % when combined with a fullerene acceptor (PC<jats:sub>61</jats:sub>BM). The results showed that the <jats:italic>N</jats:italic>‐phenylcarbazole and triphenylamine derivatives functioned as electron acceptor and donor materials, respectively. The conversion from the electron donor to the acceptor was achieved via a slight change in the structure of the terminal donor groups of the dioxaborin compounds. This study will prove valuable for the development of nonfullerene acceptors.</jats:p>

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