High-mobility organic thin film transistors based on benzothiadiazole- sandwiched dihexylquaterthiophenes

Sonar, P., Singh, S. P., Sudhakar, S., Dodabalapur, A., & Sellinger, A. (2008) High-mobility organic thin film transistors based on benzothiadiazole- sandwiched dihexylquaterthiophenes. Chemistry of Materials, 20(9), pp. 3184-3190.

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We report here the synthesis, characterization, and organic thin-film transistor (OTFT) mobilities of 4,7-bis(5-(5-hexylthiophen-2-yl)thiophen-2-yl) benzo[1,2,5]thiadiazole (DH-BTZ-4T). DH-BTZ-4T was prepared in one high-yield step from commercially available materials using Suzuki chemistry and purified by column chromatography. OTFTs with hole mobilities of 0.17 cm2/(Vs) and on/off current ratios of 1 × 105 were prepared from DH-BTZ-4T active layers deposited by vacuum deposition. As DH-BTZ-4T is soluble in common solvents, solution processed devices were also prepared by spin coating yielding preliminary mobilities of 6.0 × 10-3 cm 2/(Vs). The promising mobilities and low band gap (1.90 eV) coupled with solution processability and ambient stability makes this material an excellent candidate for application in organic electronics.

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ID Code: 75251
Item Type: Journal Article
Refereed: Yes
Keywords: Column chromatography, Olefins, Organic solvents, Spin coating, Synthesis (chemical), Vacuum deposition, High mobility organic thin film transistors, Organic electronics, Thin film transistors
DOI: 10.1021/cm800139q
ISSN: 0897-4756
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Current > Schools > School of Advertising, Marketing & Public Relations
Copyright Owner: Copyright 2008 American Chemical Society
Deposited On: 28 Oct 2014 02:25
Last Modified: 29 Oct 2014 04:54

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