Annealing-free high-mobility diketopyrrolopyrrole-quaterthiophene copolymer for solution-processed organic thin film transistors

Li, Y., Sonar, P., Singh, S. P., Soh, M. S., Van Meurs, M., & Tan, J. (2011) Annealing-free high-mobility diketopyrrolopyrrole-quaterthiophene copolymer for solution-processed organic thin film transistors. Journal of the American Chemical Society, 133(7), pp. 2198-2204.

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A donor-acceptor polymer semiconductor, PDQT, comprising diketopyrrolopyrrole (DPP) and β-unsubstituted quaterthiophene (QT) for organic thin film transistors (OTFTs) is reported. This polymer forms ordered layer-by-layer lamellar packing with an edge-on orientation in thin films even without thermal annealing. The strong intermolecular interactions arising from the fused aromatic DPP moiety and the DPP-QT donor-acceptor interaction facilitate the spontaneous self-assembly of the polymer chains into close proximity and form a large π-π overlap, which are favorable for intermolecular charge hopping. The well-interconnected crystalline grains form efficient intergranular charge transport pathways. The desirable chemical, electronic, and morphological structures of PDQT bring about high hole mobility of up to 0.97 cm2/(V·s) in OTFTs with polymer thin films annealed at a mild temperature of 100 °C and similarly high mobility of 0.89 cm2/(V·s) for polymer thin films even without thermal annealing.

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ID Code: 75226
Item Type: Journal Article
Refereed: Yes
Keywords: Charge hopping, Charge transport, Close proximity, Crystalline grains, Diketopyrrolopyrroles, Donor-acceptor interaction, Donor-acceptor polymers, High mobility, Intergranular, Intermolecular interactions, Lamellar packing, Mild temperatures, Morphological structures, Ordered layer, Organic thin film transistors, Polymer chains, Polymer thin films, Quaterthiophene, Solution-processed, Thermal-annealing, Annealing, Hole mobility, Plastic films, Polymer films, Polymeric films, Polymers, Thin films, Thin film transistors, copolymer, crystallin, diketopyrrolopyrrole, polymer, pyrrole derivative, thiophene derivative, unclassified drug, article, chemical structure, electron, film, molecular interaction, semiconductor, synthesis, temperature
DOI: 10.1021/ja1085996
ISSN: 00027863 (ISSN)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: © 2011 American Chemical Society.
Deposited On: 29 Oct 2014 05:05
Last Modified: 30 Oct 2014 01:58

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