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Proceedings Paper

Multicolor organic LEDs processed by integration of screen printing and thermal transfer printing
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Paper Abstract

Color integration in organic LEDs (OLEDs) on a substrate has always been a challenge due to the incompatibility of OLED materials with the conventional photolithography. In this paper, we report a process for the fabrication of large-area multicolor OLEDs of arbitrary patterns by combination of thermal-transfer printing and screen-printing. Thermal transfer printing is used to introduce color-tuning dyes into a thermally stable OLED polymer layer from a dye- dispersed polymer layer on the donor plate. Such a process permits controllable and uniform doping of a polymer layer over large areas. By using a patterned color donor plate, color integration in OLEDs could be accomplished with a single thermal transfer step. In this work, the source plate containing multicolor patterns is fabricated by screen- printing. The RGB color patterns were printed sequentially by using RGB inks prepared by dispersing nile red,C6 and perylene into a commercial screen-printing paste. Based on these printing approaches, we have successfully fabricated multicolor single-layer and heterostructure OLEDs.

Paper Details

Date Published: 30 June 2000
PDF: 8 pages
Proc. SPIE 4079, Display Technologies III, (30 June 2000); doi: 10.1117/12.389398
Show Author Affiliations
Hsin-hua Chang, National Central Univ. (Taiwan)
Chung-chih Wu, National Taiwan Univ. (Taiwan)
Chih Chung Yang, National Taiwan Univ. (Taiwan)
Chieh-wei Chen, National Taiwan Univ. (Taiwan)
Cheng-chung Lee, National Central Univ. (Taiwan)

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

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