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Synthesis of a Tetrazine-Quaterthiophene Copolymer and Its Optical, Structural and Photovoltaic Properties

Synthesis of a Tetrazine-Quaterthiophene Copolymer and Its Optical, Structural and Photovoltaic Properties

Astrid-Caroline Knall, Sebastian Franz Hoefler, Manuel Hollauf, Ferula Thaler, Sven Noesberger, Ilie Hanzu, Heike Ehmann, Mathias Hobisch, Stefan Spirk, Shuguang Wen, Renqiang Yang, Thomas Rath, Gregor Trimmel

J Mater Sci. 2019;54(13):10065-10076.

PMID: 31057182

Abstract:

Herein, we report the synthesis of a novel, tetrazine-based conjugated polymer. Tetrazines have the benefit of being strong electron acceptors, while little steric hindrance is imposed on the flanking thiophene rings. Conversion of a suitably substituted nitrile precursor led to 3,6-bis(5-bromo-4-(2-octyldodecyl)thiophen-2-yl)-1,2,4,5-tetrazine (2OD-TTz). Palladium-catalyzed copolymerization of 2OD-TTz with a bithiophene monomer yielded an alternating tetrazine-quaterthiophene copolymer (PTz4T-2OD). The polymer PTz4T-2OD showed an optical band gap of 1.8 eV, a deep HOMO energy level of - 5.58 eV and good solubility. In combination with the non-fullerene acceptor ITIC-F, solar cells with power conversion efficiencies of up to 2.6% were obtained.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP2097998597	ITIC-F		2097998-59-7	Price

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