Multicolor Organic LEDs Processed by Integration of Screen Printing and Thermal Transfer Printing
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2000
- Accession Number
- ADP011312
Entities
People
- Cheng-chung Lee
- Cheng-chung Yang
- Chieh-wei Chen
- Chung-chih Wu
- Hsin-hua Chang
Organizations
- National Central University