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Advances in Materials Science and Engineering
Volume 2016, Article ID 4081697, 8 pages
Review Article

Specifics and Challenges to Flexible Organic Light-Emitting Devices

Department of Microelectronics, Technical University of Sofia, “Kliment Ohridski” Boulevard 8, Block 1, Room 1000B, 1000 Sofia, Bulgaria

Received 31 January 2016; Accepted 16 February 2016

Academic Editor: Peter Majewski

Copyright © 2016 Mariya Aleksandrova. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Several recent developments in material science and deposition methods for flexible organic light-emitting devices (OLEDs) are surveyed. The commonly used plastic substrates are compared, according to their mechanical, optical, thermal, and chemical properties. Multilayer electrode structures, used as transparent electrodes, replacing conventional indium tin oxide (ITO) are presented and data about their conductivity, transparency, and bending ability are provided. Attention is paid to some of the most popular industrial processes for flexible OLEDs manufacturing, such as roll-to-roll printing, inkjet printing, and screen printing. Main specifics and challenges, related to the foils reliability, mechanical stability of the transparent electrodes, and deposition and patterning of organic emissive films, are discussed.