Open AccessDiffusion barriers for achieving controlled concentrations of luminescent dopants via diffusion for mask-less RGB color patterning of organic light emitting devices
Author(s) -
Yoshitaka Kajiyama,
Koichi Kajiyama,
Hany Aziz
Publication year - 2015
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.23.030783
Subject(s) - oled , dopant , materials science , diffusion , optoelectronics , doping , luminescence , substrate (aquarium) , rgb color model , optics , nanotechnology , computer science , oceanography , physics , layer (electronics) , geology , thermodynamics , operating system
Using molecular diffusion as an approach to introduce organic luminescent dopants for making organic light emitting devices (OLEDs) of different colors on one substrate has the potential to overcome the yield and resolution limitations of the current OLED display technology. In this work, diffusion barriers made of MoO 3 and a hole transport material mixture are introduced. The barriers effectively confine the diffusion of the dopants to only the desired depths. With the use of these barriers, OLEDs with highly controlled doping concentrations and performance are fabricated. The barriers thus allow utilizing simple diffusion methods for RGB patterning in OLEDs.