By a News Reporter-Staff News Editor at Electronics Newsweekly -- A new study on Lasers and Photonics is now available. According to news reporting out of Taejon, South Korea, by VerticalNews editors, research stated, "An effective method is presented for enhancing the outcoupling efficiency of translucent/bi-directional organic light-emitting diodes (TL/BD-OLEDs) with a bottom indium tin oxide (ITO) anode and a top cathode comprised of a thin Ag layer covered with an organic capping layer. Upon insertion of a nanoparticle (NP)-based scattering layer (NPSL) between the substrate and the ITO anode, the TL/BD-OLEDs exhibit significantly enhanced external quantum efficiency (EQE) in both emission directions."
Our news journalists obtained a quote from the research from the Korea Advanced Institute of Science and Technology (KAIST), "Furthermore, the NPSL improves the color stability of the TL/BD-OLEDs over a wide range of viewing angles. Simulations based on geometrical and statistical optics are performed to elucidate the mechanism by which the efficiency is enhanced and to establish strategies for further optimization. Simulations performed on the scattering layers with varying NP volume percentage reveal that the bottom-side emission is governed by competition between waveguide-mode extraction and backward scattering by NPs in the film, while the top-side emission is largely dominated by the latter."
According to the news editors, the research concluded: "Optimized bi-directional OLEDs achieve a 1.64-fold enhanced EQE compared to reference devices without NPSL."
For more information on this research see: Bi-directional organic light-emitting diodes with nanoparticle-enhanced light outcoupling. Laser & Photonics Reviews, 2013;7(6):1079-1087. Laser & Photonics Reviews can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Laser & Photonics Reviews - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1863-8899)
Our news journalists report that additional information may be obtained by contacting H.W. Chang, Korea Adv Inst Sci & Technol, Dept. of Elect Engn, Taejon 305701, South Korea. Additional authors for this research include J. Lee, T.W. Koh, S. Hofmann, B. Lussem, S. Yoo, C.C. Wu, K. Leo and M.C. Gather.
Keywords for this news article include: Asia, Taejon, South Korea, Electronics, Lasers and Photonics, Light-emitting Diode
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