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Proceedings Paper

Photoluminescence studies of the light-emitting species in new materials for polymer devices
Author(s): Garry Rumbles; P. F. Miller; M. M. deSouza; I. R. Gould; H. Amer; D. L. Russell; Andrew B. Holmes; Stephen C. Moratti; Ifor D. W. Samuel
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Paper Abstract

The photophysics of a soluble, cynao-substituted poly (p- phenylene vinylene) and some related model compounds are compared using steady-state and time-resolved photoluminescence spectroscopy. The nature of the excited states in the model compounds are shown to differ markedly from the polymer as steric hindrance between the cyano group and an alkoxy group disrupts electron delocalization resulting in a twist in the molecular structure. In solution the polymer exhibits emission from both isolated chains, and from aggregates formed when the solution is allowed to equilibrate over a long period of time. The aggregate has its own distinct absorption and emission features and is assigned to a dimer- like species. When spun from the same solvent, thin films of the polymer exhibit the same emission features as the solution aggregates.

Paper Details

Date Published: 17 December 1999
PDF: 8 pages
Proc. SPIE 3797, Organic Light-Emitting Materials and Devices III, (17 December 1999); doi: 10.1117/12.372701
Show Author Affiliations
Garry Rumbles, Imperial College of Science, Technology and Medicine (United Kingdom)
P. F. Miller, Imperial College of Science, Technology and Medicine (United Kingdom)
M. M. deSouza, Imperial College of Science, Technology and Medicine (United Kingdom)
I. R. Gould, Imperial College of Science, Technology and Medicine (United Kingdom)
H. Amer, Imperial College of Science, Technology and Medicine (United Kingdom)
D. L. Russell, Imperial College of Science, Technology and Medicine (United Kingdom)
Andrew B. Holmes, Univ. of Cambridge (United Kingdom)
Stephen C. Moratti, Univ. of Cambridge (United Kingdom)
Ifor D. W. Samuel, Univ. of Durham (United Kingdom)


Published in SPIE Proceedings Vol. 3797:
Organic Light-Emitting Materials and Devices III
Zakya H. Kafafi, Editor(s)

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