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Improvement of Luminescence Efficiency and Photostability in Polymer Thin Films by S.M. Lipson; D.F. O'Brien; H.J. Byrne; A.P. Davey; W.J. Blau is a Engineering article available to read on EtoBox.

What is Improvement of Luminescence Efficiency and Photostability in Polymer Thin Films about?

The photodegradation mechanism and luminescence ef®ciency of a series of thin polymer ®lms prepared under a variety of conditions was studied. The conjugated polymer, poly(m-phenylene-co-2,5-dioctoxy-p-phenylenevinylene) (PmPV), is shown by infra-red spectroscopy to degrade via the chain scission of the carbon double bond along the polymer backbone. This causes a reduction in conjugation length and a blue shift in its absorption and photoluminescence (PL) spectra. To reduce photodegradation effects, ®lms were prepared using argon (Ar) gas and were investigated in air and an oxygen free environment. The initial PL intensity increased by over 70% for Ar treated ®lms. The PL decay in air was bi-exponential in nature, with a sharp initial decay linked to atmospheric oxygen, and a longer second decay linked to oxygen embedded in the ®lm. The increase in both PL ef®ciency and degradation lifetime, coupled with device encapsulation, should signi®cantly improve the performance of electroluminescent devices.

Who reads Improvement of Luminescence Efficiency and Photostability in Polymer Thin Films?

Author

S.M. Lipson; D.F. O'Brien; H.J. Byrne; A.P. Davey; W.J. Blau

Publisher

Elsevier Science; Elsevier ; Elsevier Sequoia; Elsevier BV (ISSN 0040-6090)

Published

2000

Language

EN

Field

Engineering (Physical Sciences)