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Proceedings Paper

Polymeric light-emitting diodes utilizing TPD-dispersed polyimide thin film and organometallic complex
Author(s): Hyuntaek Lim; Hyunjoo Park; Jae-Gyoung Lee; Youngkyoo Kim; Won-Jei Cho; Chang-Sik Ha
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Paper Abstract

The polymeric light-emitting diodes (PLEDs) in the present work consist of a double layer organic structure, i.e. ITO/hole transport material (HTM)-dispersed polymer/emitter/cathode. Fully aromatic polyimide, poly(4,4'- oxydiphenylene pyromellitimide) (PMDA-ODA PI), with outstanding thermal stability and high glass transition temperature of 377 degrees Celsius was introduced as a matrix polymer for binding the HTM. N,N'-diphenyl-N,N'-di(m- tolyl)benzidine (TPD) and bis(8-hydroxyquinolinato)zinc(II) (Znq2) were used as a HTM and an emitter, respectively. The turn-on voltage was ca. 7 V. Bright greenish yellow light was observed at 11 V under room light.

Paper Details

Date Published: 17 April 1998
PDF: 9 pages
Proc. SPIE 3281, Polymer Photonic Devices, (17 April 1998); doi: 10.1117/12.305439
Show Author Affiliations
Hyuntaek Lim, Pusan National Univ. (South Korea)
Hyunjoo Park, Pusan National Univ. (South Korea)
Jae-Gyoung Lee, Institute for Advanced Engineering (South Korea)
Youngkyoo Kim, Institute for Advanced Engineering (South Korea)
Won-Jei Cho, Pusan National Univ. (South Korea)
Chang-Sik Ha, Pusan National Univ. (South Korea)

Published in SPIE Proceedings Vol. 3281:
Polymer Photonic Devices
Bernard Kippelen; Donal D. C. Bradley, Editor(s)

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