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Browse Journals & Magazines > Applied Physics Letters ...> Volume:94 Issue:8 Help

Low temperature magnetic field effects in Alq3-based organic light emitting diodes

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4 Author(s)
Zhang, Y. ; School of Physical Science & Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, People’s Republic of China ; Liu, R. ; Lei, Y.L. ; Xiong, Z.H.

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The magnetic field effects on injection current and electroluminescence have been investigated for aluminum tris(8-hydroxyquinoline) (Alq3)-based organic light emitting diodes at the temperature of 12 K. The experimental traces of electroluminescence exhibit a rapid rising at low magnetic field, followed by a decrease at high field strength, whereas the injection current increases continuously. The drive dependence of the high field effect of the quantum efficiency matches that which is expected for the triplet-triplet annihilation process, indicating that the delayed fluorescence from the triplets’ annihilation significantly contributes to the field dependent light emission in our devices.

Published in:
Applied Physics Letters  (Volume:94 ,  Issue: 8 )

Date of Publication: Feb 2009

Page(s):
083307 - 083307-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.3089844
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Feb 2009

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