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Effect of Alkyl Side Chains on the Photovoltaic Performance of 2,1,3‐Benzoxadiazole‐Based (‐X‐DADAD‐) n ‐Type Copolymers
Author(s) -
Klimovich Irina V.,
Susarova Diana K.,
Inasaridze Lia.,
Akkuratov Alexander V.,
Chernyak Alexander. V.,
Troshin Pavel A.
Publication year - 2017
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201700055
Subject(s) - side chain , organic solar cell , copolymer , thiophene , alkyl , polymer solar cell , polymer , photovoltaic system , materials science , polymer chemistry , carbazole , conjugated system , open circuit voltage , photovoltaics , chemical engineering , chemistry , organic chemistry , voltage , physics , composite material , ecology , quantum mechanics , engineering , biology
A family of novel (X‐TATAT) n ‐type conjugated polymers based on the carbazole (X), thiophene (T), and benzoxadiazole (A) moieties is designed and explored as electron‐donor materials for organic bulk heterojunction solar cells. Incorporation of the branched side chains of different size and shape affects significantly the optoelectronic properties of the materials, particularly frontier energy levels of polymers translated to the open circuit voltages of the photovoltaic cells. The revealed unprecedented correlation between the parameters of the solar cells ( V OC , fill factor (FF), J SC ) and bulkiness of the alkyl side chains provides useful guidelines for rational design of novel materials for organic photovoltaics.