NDLI: Electrical Properties of Trilayer Organic Light-Emitting Diodes With a Mixed Emitting Layer

Content Provider	IEEE Xplore Digital Library
Author	Jongwoon Park Seounghwan Park Dongchan Shin
Copyright Year	1983
Abstract	We investigate the electrical properties of three different trilayer organic light-emitting diodes (OLEDs), one of which is based on a conventional layered structure and the others on a blended structure where an emitting layer (EML) is uniformly or stepwise mixed with an electron transport layer (ETL), Tris-(8-hydroxyquinoline) aluminum ( Alq₃). By way of simulations, we visualize the electrical behaviors that provide a clear understanding on why the uniformly mixed structure enhances further the longevity of OLEDs, compared to the other configurations. Namely, the uniformly mixed structure has the lowest concentration of positive charges in the ETL (thereby reducing oxidative degradation of Alq₃) and weakest electric field (decreasing the probability of Joule heating), followed by the stepwise mixed one and then the layered one. However, such blended structures show lower recombination efficiency due to the delocalization of carriers (recombination), which has been demonstrated by simulations of the current balance.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	2525
Ending Page	2529
Page Count	5
File Size	723906
File Format	PDF
ISSN	07338724
Volume Number	27
Issue Number	13
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Organic light emitting diodes Poisson equations Aluminum Visualization Degradation Stability Charge carrier processes Electron mobility Power engineering and energy Excitons performance simulation Blended structure current balance organic light-emitting diodes (OLEDs)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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