Title
Passivation of organic light emitting diode anode grid lines by pulsed Joule heating
Author
Janka, M.
Gierth, R.
Rubingh, J.E.
Abendroth, M.
Eggert, M.
Moet, D.J.D.
Lupo, D.
Publication year
2015
Abstract
We report the self-aligned passivation of a current distribution grid for an organic light emitting diode (OLED) anode using a pulsed Joule heating method to align the passivation layer accurately on the metal grid. This method involves passing an electric current through the grid to cure a polymer dielectric. Uncured polymer is then rinsed away, leaving a patterned dielectric layer that conforms to the shape of the grid lines. To enhance the accuracy of the alignment, heat conduction into the substrate and the transparent electrode is limited by using short current pulses instead of a constant current. Excellent alignment accuracy of the dielectric layer on printed metal grid lines has been achieved, with a typical 4-μm dielectric overhang. In addition to good accuracy, pulsed Joule heating significantly cuts down process time and energy consumption compared to heating with a constant current. The feasibility of using a printed current distribution grid and Joule heating was demonstrated in an OLED device. cop. 2015 Author(s).
Subject
Nano Technology
HOL - Holst
TS - Technical Sciences
Industrial Innovation
Electric current distribution measurement
Electrodes
Energy utilization
Heat conduction
Heating
Joule heating
Passivation
Organic light emitting diodes (OLED)
To reference this document use:
http://resolver.tudelft.nl/uuid:31a79b14-2f3d-469a-beef-f6b92c72d092
DOI
https://doi.org/10.1063/1.4930883
TNO identifier
528225
Publisher
American Institute of Physics Inc.
ISSN
0003-6951
Source
Applied Physics Letters, 107 (10)
Article number
103304
Document type
article