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Structure-property studies and orientation effects of polythiophenes containing mesogenic side chains
, N. Somanathan, T. Narasimhaswamy
Published in Wiley
Volume: 46
Issue: 14
Pages: 1463 - 1477
Liquid crystalline materials display unique properties, which can be exploited in organic light emitting diodes. Polythiophene model compounds containing phenyl groups linked with azomethine, ester, and alkoxy groups [thiophene-3-alkyloxy benzoyloxy aniline series (N series) and thiophene-3-alkoxy phenoxy amino benzoate series (R Series)] were synthesized. Molecular orbital calculations were performed and the predicted band gaps compared to understand the effects of spacer length and linkage. The experimental photoabsorption characteristics are compared with the theoretically predicted band gap. Photoabsorption and emission studies on N series and R series polymers as the function of polarizer angle suggest that polymers of both series emit polarized light in all base color ranges. The electroemission characteristics of the above-synthesized polymers were also recorded as the function of polarizer angle. The results show that the compounds also emit polarized electroemission, and the EL polarization ratio decreases with the increase of alkoxy chain length for N and R polymers. © 2008 Wiley Periodicals, Inc.
About the journal
JournalData powered by TypesetJournal of Polymer Science, Part B: Polymer Physics
PublisherData powered by TypesetWiley
Open AccessNo