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

Hsin-hua Chang; Chung-chih Wu; Chih Chung Yang; Chieh-wei Chen; Cheng-chung Lee

doi:10.1117/12.389398

30 June 2000 Multicolor organic LEDs processed by integration of screen printing and thermal transfer printing

Hsin-hua Chang, Chung-chih Wu, Chih Chung Yang, Chieh-wei Chen, Cheng-chung Lee

Proceedings Volume 4079, Display Technologies III; (2000) https://doi.org/10.1117/12.389398
Event: Photonics Taiwan, 2000, Taipei, Taiwan

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.

Citation Download Citation

Hsin-hua Chang, Chung-chih Wu, Chih Chung Yang, Chieh-wei Chen, and Cheng-chung Lee "Multicolor organic LEDs processed by integration of screen printing and thermal transfer printing", Proc. SPIE 4079, Display Technologies III, (30 June 2000); https://doi.org/10.1117/12.389398

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