Journal
APPLIED SURFACE SCIENCE
Volume 254, Issue 17, Pages 5511-5513Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2008.02.116
Keywords
exciplex emission; electroplex emission; electroluminescence; interface
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Organic light-emitting diodes (OLEDs) have been fabricated which consist of N,N'-diphenyl-N,N'-bis( 3-methylphenyl)-1,1'-biphenyl-4,4'-diamine) (TPD), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), and tris(8-hydroxyquinoline) aluminum (Alq(3)). Four emission peaks located at about 401 nm, 425 nm, 452 nm and 480 nm have been obtained in the electroluminescence (EL) spectra of these devices. The former two emissions originate from the exciton emission of TPD molecular. The last two emissions could be attributed to local (LOC) exiplex emission and charge transfer (CT) exiplex emission at the interface between TPD and BCP layers, respectively. (C) 2008 Elsevier B.V. All rights reserved.
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