Space-charge-mediated delayed electroluminescence from polyfluorene thin films

Sinha, S.; Monkman, A. P.; Güntner, R.; Scherf, U.
June 2003
Applied Physics Letters;6/30/2003, Vol. 82 Issue 26, p4693
Academic Journal
In polyfluorene thin films, an electrically induced short-lived delayed fluorescence (of the order of ms) is observed, which grows in intensity as the temperature is increased from 30 K to 290 K. From bias-offset-dependent electroluminescence intensity measurements and decay kinetics measurements, we conclude that the delayed recombination of space-charge carriers, along with the long-lasting tail of the prompt electrofluorescence, give rise to the short-lived delayed fluorescence.


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