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Proceedings Paper

Thermal transfer approach for the doping of organic LEDs
Author(s): Chih Chung Yang; Chung-chih Wu; Hsin-hua Chang; Chieh-wei Chen
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Paper Abstract

An effective process of performing controllable doping of polymer films in organic light-emitting devices is reported. In this approach, a film to be doped is brought into direct contact with a dye-dispersed polymer donor film to permit direct dye-diffusion thermal transfer. Theoretical and experimental studies indicate that this doping process can be modeled by Fick's diffusion theory and that a desired dopant distribution from shallow to flat profiles may be obtained in a single transfer step by adjusting the diffusion conditions. Doped-polymer light-emitting devices made by this process and the conventional blending process exhibited same device characteristics. Along with patterned color donor plates, we demonstrated multicolor OLEDs of arbitrary patterns over large areas with a single thermal transfer step.

Paper Details

Date Published: 30 June 2000
PDF: 8 pages
Proc. SPIE 4079, Display Technologies III, (30 June 2000); doi: 10.1117/12.389399
Show Author Affiliations
Chih Chung Yang, National Taiwan Univ. (Taiwan)
Chung-chih Wu, National Taiwan Univ. (Taiwan)
Hsin-hua Chang, National Central Univ. (Taiwan)
Chieh-wei Chen, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 4079:
Display Technologies III
I-Wei Wu; Heiju Uchiike, Editor(s)

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