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Systematic Investigation of a Novel Low‐Bandgap Terpolymer Library via Inkjet Printing: Influence of Ink Properties and Processing Conditions
Author(s) -
Teichler Anke,
Perelaer Jolke,
Kretschmer Florian,
Hager Martin D.,
Schubert Ulrich S.
Publication year - 2013
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.201200526
Subject(s) - materials science , copolymer , polymer , monomer , inkwell , solvent , chemical engineering , thin film , inkjet printing , conjugated system , polymer chemistry , toluene , fluorene , band gap , nanotechnology , organic chemistry , chemistry , composite material , optoelectronics , engineering
The thin‐film properties of a polymer library consisting of novel conjugated low‐bandgap poly(diketopyrrolopyrrole‐ co ‐benzothiadiazole‐ co ‐fluorene) (poly(DPP‐ co ‐BTD‐ co ‐F)) polymers are investigated. The content of the monomer units in the copolymers is systematically varied. Structure–property relationships are obtained for the ink characteristics, the film formation qualities, and their optical properties. Toluene/ o ‐DCB in a ratio 90/10 and a concentration of 5 mg mL −1 is found to be a suitable solvent system for all polymers. The polymer compositions and the choice of solvent have a significant influence on the film properties. Inkjet printing is shown to be a suitable technique for the preparation of thin‐film libraries that subsequently can be characterized by combinatorial screening tools.