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

doi:10.1007/s10853-019-03551-3

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

^*Corresponding author for this work

Research output: Contribution to journal › Article

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.

Original language	English
Pages (from-to)	10065–10076
Number of pages	12
Journal	Journal of Materials Science
Volume	54
Issue number	13
DOIs	https://doi.org/10.1007/s10853-019-03551-3
Publication status	Published - 2019

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Fields of Expertise

Advanced Materials Science

Access to Document

10.1007/s10853-019-03551-3

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Projects

1 Finished

SolaBat - Solar cell meets battery - Realization of a hybrid energy system

Hanzu, I.

1/03/16 → 28/02/19

Project: Research project

Cite this

Knall, A. C., Hoefler, S. F., Hollauf, M., Thaler, F., Noesberger, S., Hanzu, I., ... Trimmel, G. (2019). Synthesis of a tetrazine–quaterthiophene copolymer and its optical, structural and photovoltaic properties. Journal of Materials Science, 54(13), 10065–10076. https://doi.org/10.1007/s10853-019-03551-3

Synthesis of a tetrazine–quaterthiophene copolymer and its optical, structural and photovoltaic properties. / Knall, Astrid Caroline; Hoefler, Sebastian Franz; Hollauf, Manuel; Thaler, Ferula; Noesberger, Sven; Hanzu, Ilie; Ehmann, Heike; Hobisch, Mathias; Spirk, Stefan; Wen, Shuguang; Yang, Renqiang; Rath, Thomas ; Trimmel, Gregor.

In: Journal of Materials Science, Vol. 54, No. 13, 2019, p. 10065–10076.

Research output: Contribution to journal › Article

Knall, Astrid Caroline ; Hoefler, Sebastian Franz ; Hollauf, Manuel ; Thaler, Ferula ; Noesberger, Sven ; Hanzu, Ilie ; Ehmann, Heike ; Hobisch, Mathias ; Spirk, Stefan ; Wen, Shuguang ; Yang, Renqiang ; Rath, Thomas ; Trimmel, Gregor. / Synthesis of a tetrazine–quaterthiophene copolymer and its optical, structural and photovoltaic properties. In: Journal of Materials Science. 2019 ; Vol. 54, No. 13. pp. 10065–10076.

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AU - Hollauf, Manuel

AU - Thaler, Ferula

AU - Noesberger, Sven

AU - Hanzu, Ilie

AU - Ehmann, Heike

AU - Hobisch, Mathias

AU - Spirk, Stefan

AU - Wen, Shuguang

AU - Yang, Renqiang

AU - Rath, Thomas

AU - Trimmel, Gregor

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AB - 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.

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