Journal
OPTICAL MATERIALS
Volume 31, Issue 2, Pages 320-327Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2008.05.001
Keywords
Bipolar compounds; Arylamines; Quinoxalines; Crystallization; Luminescence
Categories
Funding
- FCT
- FEDER [POCI/QUI/58291/2004]
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Novel electroluminescent materials combining three functionalities were used as active layers in light-emitting diodes. These functionalities are brought about by the presence of three moieties: diphenylstylbeneamines, for hole transport, quinoxaline, for electron-transport, and a dehydroabietic acid methyl ester, to prevent crystallisation. The devices prepared with these materials and with magnesium cathodes show efficiencies up to 0.03 cd/A. which is about one order of magnitude higher than the efficiency obtained with the related diphenyistylbeneamines. (C) 2008 Elsevier B.V. All rights reserved.
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