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2,1,3‐Benzothiadiazole‐5,6‐Dicarboxylic Imide – A Versatile Building Block for Additive‐ and Annealing‐Free Processing of Organic Solar Cells with Efficiencies Exceeding 8%
Author(s) -
Nielsen Christian B.,
Ashraf Raja Shahid,
Treat Neil D.,
Schroeder Bob C.,
Donaghey Jenny E.,
White Andrew J. P.,
Stingelin Natalie,
McCulloch Iain
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201404858
Subject(s) - materials science , imide , annealing (glass) , organic solar cell , alkyl , polymer , photovoltaic system , dicarboxylic acid , solvent , polymer chemistry , chemical engineering , organic chemistry , composite material , chemistry , engineering , ecology , biology
A new photoactive polymer comprising benzo[1,2‐b:3,4‐b′:5,6‐d′]trithiophene and 2,1,3‐benzothiadiazole‐5,6‐dicarboxylic imide is reported. The synthetic design allows for alkyl chains to be introduced on both electron‐rich and electron‐deficient components, which in turn allows for rapid optimization of the alkyl chain substitution pattern. Consequently, the optimized polymer shows a maximum efficiency of 8.3% in organic photovoltaic devices processed in a commercially viable fashion without solvent additives, annealing, or device engineering.