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Durham University

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Publication details for Professor Andy Monkman

Pomfret, SJ, Monkman, AP & Havinga, EE (1996). Electroabsorption measurements of polysquaraine. Synthetic Metals 78(3): 285-288.
  • Publication type: Journal Article
  • ISSN/ISBN: 0379-6779
  • Keywords: polysquaraine; electroabsorptionSINGLE-CRYSTALS; EXCITONS; POLYMERS; BAND

Author(s) from Durham

Abstract

We report an electroabsorption signal for the main IR-Vis absorption
peak in thin films of polysquaraine. Spectra from 1.0 to 2.0 eV at a
temperature of 10 K show a positive peak at 1.29 eV, followed by a
negative peak at 1.35 eV with vibronic structure on the high energy
wing. The results are discussed in terms of a Stark effect on molecular
states. Using the results a Stark shift of about 1 meV is calculated,
consistent with values for other pi-conjugated polymer systems.