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Electric field effect on luminescence efficiency in 8-hydroxyquinoline aluminum (Alq3) thin films

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4 Author(s)
Stampor, W. ; Department of Molecular Physics, Technical University of Gdańsk, ul. G. Narutowicza 11/12, 80-952 Gdańsk, Poland ; Kalinowski, J. ; Di Marco, P. ; Fattori, V.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.118784 

Electric field-induced luminescence quenching in thin films made from common organic electroluminescent material of aluminum (III) 8-hydroxyquinoline (Alq3) is reported. The dependence of luminescence quenching on excitation wavelength and electric field is attributed to field-assisted hopping separation of charge in localized excited states. The effect extrapolated to high electric fields can reduce the luminescence yield by as much as 60% limiting electroluminescence quantum efficiency in high-field-driven light emitting diodes based on the Alq3 emitter. © 1997 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:70 ,  Issue: 15 )

Date of Publication:

Apr 1997

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