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Difluorinated Oligothiophenes for High‐Efficiency All‐Small‐Molecule Organic Solar Cells: Positional Isomeric Effect of Fluorine Substitution on Performance Variations
Author(s) -
Duan Tainan,
Gao Jie,
Babics Maxime,
Kan Zhipeng,
Zhong Cheng,
Singh Ranbir,
Yu Donghong,
Lee Jaewon,
Xiao Zeyun,
Lu Shirong
Publication year - 2020
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.202070031
Subject(s) - fluorine , organic solar cell , molecule , small molecule , energy conversion efficiency , substitution (logic) , photovoltaic system , conjugated system , materials science , champion , chemistry , combinatorial chemistry , organic chemistry , polymer , optoelectronics , ecology , biochemistry , computer science , political science , law , biology , programming language
Difluorinated Oligothiophenes In article number 1900472 , Zhipeng Kan, Cheng Zhong, Shirong Lu, and co‐workers synthesize and use difluorinated pentathiophene derivatives as electron donors in all‐small‐molecule organic solar cells. The different substitutional positions of the fluorine atoms in the conjugated backbone of the donor molecules lead to various material and photovoltaic properties. A champion power conversion efficiency of 9.36% is obtained with the central fluorinated isomer‐based device.