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Journal Article Color-Stable, ITO-Free White Organic Light-Emitting Diodes with Enhanced Efficiency Using Solution-Processed Transparent Electrodes and Optical Outcoupling Layers
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Authors
Hong-Wei Chang, Yong Hyun Kim, Jonghee Lee, Simone Hofmann, Bjorn Lussem, Lars Muller-Meskamp, Malte C. Gather, Karl Leo, Chung-Chih Wu
Issue Date
2014-05
Citation
Organic Electronics, v.15, no.5, pp.1028-1034
ISSN
1566-1199
Publisher
Elsevier
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1016/j.orgel.2014.02.017
Project Code
14PB2200, Development of Soluble TFT and Pixel Formation Materials/Process Technologies for AMOLED TV, Lee Jonghee
Abstract
In this work, we demonstrate color-stable, ITO-free white organic light-emitting diodes (WOLEDs) with enhanced efficiencies by combining the high-conductivity conducting polymer PEDOT:PSS as transparent electrode and a nanoparticle-based scattering layer (NPSL) as the effective optical out-coupling layer. In addition to efficiency enhancement, the NPSL is also beneficial to the stabilization of electroluminescent spectra/colors over viewing angles. Both the PEDOT:PSS and the NPSL can be fabricated by simple, low-temperature solution processing. The integration of both solution-processable transparent electrodes and light extraction structures into OLEDs is particularly attractive for applications since they simultaneously provide manufacturing, cost and efficiency advantages. © 2014 Elsevier B.V. All rights reserved.
KSP Keywords
Conducting polymers, Coupling layer, ITO-free, Low temperature(LT), Organic light-emitting diodes(OLEDS), Scattering layer, Solution processing, Solution-processed, White organic light-emitting diodes, efficiency enhancement, enhanced efficiency