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A New Dithienylbenzotriazole‐Based Poly(2,7‐carbazole) for Efficient Photovoltaics
Author(s) -
Peng Bo,
Najari Ahmed,
Liu Bo,
Berrouard Philippe,
Gendron David,
He Yuehui,
Zhou Kechao,
Zou Yingping,
Leclerc Mario
Publication year - 2010
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.201000315
Subject(s) - carbazole , chlorobenzene , materials science , benzotriazole , polymer chemistry , tetrahydrofuran , pedot:pss , polymer , indium tin oxide , suzuki reaction , thermal stability , chemical engineering , photochemistry , thin film , chemistry , aryl , organic chemistry , nanotechnology , alkyl , engineering , solvent , metallurgy , composite material , catalysis
A new dithienyl benzotriazole‐based conjugated polymer was synthesized by Suzuki coupling reaction. The polymer was found to be soluble in common organic solvents, such as chloroform, tetrahydrofuran and chlorobenzene, with excellent film‐forming properties. The structure of the polymer was confirmed by 1 H NMR, the molecular weights determined by GPC and the thermal properties investigated by TGA and DSC. The polymer films exhibited an absorption band in the wavelength range 300 to 610 nm. Preliminary photovoltaic cells based on the composite structure of indium tin oxide (ITO)/PEDOT:PSS/ PCDTBTz:PC 60 BM (1:2 w/w)/Al showed an open‐circuit voltage of 0.92 V, a power conversion efficiency of 2.2% and a short circuit current of 5.33 mA cm −2 .