OLEDs with enhanced high temperature operational stability

Popovic, Z. D., Vamvounis, G., Aziz, H. and Hu, N.-X. (2002). OLEDs with enhanced high temperature operational stability. In: Organic Light-Emitting Materials and Devices Vi. Conference on Organic Light-Emitting Materials and Devices VI, Seattle, U.S., (87-92). 8-10 July, 2002. doi:10.1117/12.454858

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Author Popovic, Z. D.
Vamvounis, G.
Aziz, H.
Hu, N.-X.
Title of paper OLEDs with enhanced high temperature operational stability
Conference name Conference on Organic Light-Emitting Materials and Devices VI
Conference location Seattle, U.S.
Conference dates 8-10 July, 2002
Proceedings title Organic Light-Emitting Materials and Devices Vi   Check publisher's open access policy
Journal name Organic Light-Emitting Materials and Devices VI   Check publisher's open access policy
Place of Publication Bellingham, U.S.
Publisher International Society for Optical Engineering
Publication Year 2002
Sub-type Fully published paper
DOI 10.1117/12.454858
Open Access Status File (Publisher version)
ISBN 0-8194-4568-1
ISSN 0277-786X
Volume 4800
Start page 87
End page 92
Total pages 6
Language eng
Abstract/Summary Temperature dependence of electroluminescence degradation is studied in organic light emitting devices containing an emitting layer composed of a mixture of different hole transport molecules and tris(8-hydroxyquinoline)aluminum (AlQ(3)) electron transport and emitter molecule. The emitting layer is sandwiched between hole and electron transport layers. Devices containing the hole transport molecule N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine (NPB), doped with quinacridone (DMQ) green emitter showed remarkable temperature stability. For these devices, a half-life of about 78,500 hours, 18,700 hours, and 8,600 hours can be projected for operating temperatures of 22degreesC, 700degreesC and 100degreesC, respectively, at an initial device luminance of 100 cd/m(2). Activation energies for device degradation were determined for devices with different hole transport molecules and it was found that devices with higher activation energy show better high temperature stability. These results are consistent with the recently proposed degradation mechanism based on the unstable cationic AlQ(3) species.
Subjects 0913 Mechanical Engineering
Keyword Organic Electroluminescent Devices
Light-Emitting-Diodes
Electronic-Structures
Molecular Materials
Degradation
Efficient
Transport
White
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Copyright 2002 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

 
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Created: Mon, 01 Feb 2010, 15:37:41 EST by Tara Johnson on behalf of Faculty of Science