Color-stable, ITO-free white organic light-emitting diodes with enhanced efficiency using solution-processed transparent electrodes and optical outcoupling layers
Journal
Organic Electronics
Journal Volume
15
Journal Issue
5
Pages
1028-1034
Date Issued
2014-05
Author(s)
Hong-Wei Chang
Yong Hyun Kim
Jonghee Lee
Simone Hofmann
Bjouml
rn Luuml
ssem
Lars Muuml
ller-Meskamp
Malte C. Gather
Karl Leo
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.
Subjects
Conducting polymer; OLEDs; Optical outcoupling; Transparent electrode
Other Subjects
Conducting polymers; Efficiency; Optoelectronic devices; Organic light emitting diodes (OLED); Temperature; Efficiency enhancement; Enhanced efficiency; Low temperature solutions; OLEDs; Optical outcoupling; Solution processable; Solution-processed; White organic light emitting diodes; Transparent electrodes
Type
journal article