Journal
CHEMICAL PHYSICS LETTERS
Volume 348, Issue 1-2, Pages 89-94Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0009-2614(01)01109-5
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Decay of delayed fluorescence (DF) originating from geminate electron-hole pair recombination in a thin film of a conjugated polymer, a ladder-type methyl-substituted poly (para-phenylene) (MeLPPP), has been measured as a function of time at different temperatures. On the time scale of 10(-4)-10(-2) s an algebraic law, DF(t) similar to t(-n), is approached, where n changes from 1.1 at 83 K to about 2.7 at room temperatures. Experimental results are in a good agreement with the developed theoretical model of geminate recombination of charge carriers under the premise that the transport is dispersive. (C) 2001 Elsevier Science B.V. All rights reserved.
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