Synthesis, characterization and comparative study of thiophene- benzothiadiazole based donor-acceptor-donor (D-A-D) materials

Sonar, P., Singh, S. P., Leclère, P., Surin, M., Lazzaroni, R., Lin, T. T., Dodabalapur, A., & Sellinger, A. (2009) Synthesis, characterization and comparative study of thiophene- benzothiadiazole based donor-acceptor-donor (D-A-D) materials. Journal of Materials Chemistry, 19(20), pp. 3228-3237.

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Abstract

The synthesis and characterization of solution processable donor-acceptor-donor (D-A-D) based conjugated molecules with varying ratios of thiophene as donor (D) and benzothiadiazole as acceptor (A) are reported. Optical, electrochemical, thermal, morphological and organic thin film transistor (OTFT) device properties of these materials were investigated. The thermal and polarized optical microscope analysis indicates that the materials having higher D/A ratios exhibit both liquid crystalline (LC) and OTFT behavior. AFM analysis of the materials having D/A ratios of 3 and 4 (3T1B and 4T1B) show well ordered structures, resulting from strong π-π interchain interactions compared to the other molecules in this study. A XRD patterns for 3T1B and 4T1B thin films also shows high crystalline ordering. Solution processed OTFTs of 3T1B and 4T1B have shown un-optimized charge carrier mobilities of 2 × 10 -2 cm 2 V -1 s -1 and 4 × 10 -3 cm 2 V -1 s -1, respectively on bare Si/SiO 2 substrate.

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ID Code: 75247
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: AFM, Benzothiadiazole, Comparative studies, Conjugated molecules, Crystalline ordering, Donor-acceptor, Interchain interactions, Liquid-crystalline, Organic thin film transistor devices, Polarized optical microscopes, Processable, Solution-processed, Synthesis and characterization, Well-ordered structure, XRD patterns, Carrier mobility, Crystalline materials, Electrochemical properties, Organic polymers, Photovoltaic effects, Thin film transistors, Thin films, Thiophene, Materials properties
DOI: 10.1039/b820528k
ISSN: 2050-7496
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2009 © The Royal Society of Chemistry.
Copyright Statement: Author's post-print on institutional repository after 12 months from acceptance
Deposited On: 28 Oct 2014 21:58
Last Modified: 30 Oct 2014 02:53

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