Open AccessMulti-layer printing of OLEDs as a tool for the creation of security features
Author(s) -
Bert Fischer,
Stefanie Kreissl,
Christine Boeffel,
Armin Wedel
Publication year - 2012
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.20.00a219
Subject(s) - impression , oled , computer science , materials science , grayscale , layer (electronics) , optoelectronics , structured light , computer graphics (images) , optics , nanotechnology , artificial intelligence , image (mathematics) , physics , world wide web
The combined deposition of structured and homogenous layers for the device setup of OLEDs results in a structured display visible with a gray scale impression. These permanently imprinted structures are only visible during the application of an electrical field and almost invisible in the off state. Most intriguing applications of such devices are security marks, electronic watermarks but also for advertising and design applications the creation of gray scale structures might have interesting applications.