Open AccessLight modulation of top emission organic light emitting diodes showing strong microcavity effect by applying multilayered scattering film
Author(s) -
Nam Su Kim,
Woo Young Lee,
Seon Hyeak Jung,
Min Chul Suh
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.001185
Subject(s) - materials science , scattering , optics , polarizer , optoelectronics , electroluminescence , refractive index , light scattering , oled , viewing angle , light emitting diode , modulation (music) , layer (electronics) , diode , luminance , birefringence , liquid crystal display , physics , nanotechnology , acoustics
In order to suppress the viewing angle dependence of top emission organic light emitting diodes (TEOEDs) on a strong microcavity structure, we prepared multi-layered nano scattering film which was consisted with transparent planarizing layer and hazy crosslinked scattering layer. Through such an approach, we could obtain not only a stable color shift and luminance distribution with viewing angle but also a negligible pixel blur level. Meanwhile, we investigated a black tint level of TEOLEDs after attachment of circular polarizer (CP) on various nano scattering films because nano scattering film deteriorates a black level. We found that the black level could be improved from the black tint by reducing the refractive index difference between planarizing layer and scattering layer.