Get it white: color-tunable AC/DC OLEDs

Markus Fröbel; Tobias Schwab; Mona Kliem; Simone Hofmann; Karl Leo; Malte C Gather

doi:10.1038/lsa.2015.20

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Get it white: color-tunable AC/DC OLEDs

Original Articles

- Get it white: color-tunable AC/DC OLEDs
- Light: Science & Applications Vol. 4, Issue 1, (2015)
- Affiliations：
  
  1.Institute for Applied Photophysics (IAPP), Dresden University of Technology, D-01069 Dresden, Germany
  2.School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UK
- Author bio：
  
  M Fröbel, Institute for Applied Photophysics (IAPP), Dresden University of Technology, George-Bähr-Str. 1, 01069 Dresden, Germany E-mail: markus.froebel@iapp.de
- Funds：
- DOI：10.1038/lsa.2015.20
  CLC：
- Published：2015-03，
  
  Published Online：04 December 2014，
  
  Received：10 September 2014，
  
  Revised：02 December 2014，
  
  Accepted：02 December 2014
- Accepted：
Scan QR Code
Fröbel, M. et al. Get it white: color-tunable AC/DC OLEDs. Light: Science & Applications, 4, e247 (2015).
DOI：

Fröbel, M. et al. Get it white: color-tunable AC/DC OLEDs. Light: Science & Applications, 4, e247 (2015). DOI： 10.1038/lsa.2015.20.

摘要

Abstract

Organic light-emitting diodes (OLEDs) have gained considerable attention because of their use of inherently flexible materials and their compatibility with facile roll-to-roll and printing processes. In addition to high efficiency

flexibility and transparency

reliable color tunability of solid state light sources is a desirable feature in the lighting and display industry. Here

we demonstrate a device concept for highly efficient organic light-emitting devices whose emission color can be easily adjusted from deep-blue through cold-white and warm-white to saturated yellow. Our approach exploits the different polarities of the positive and negative half-cycles of an alternating current (AC) driving signal to independently address a fluorescent blue emission unit and a phosphorescent yellow emission unit which are vertically stacked on top of each other. The electrode design is optimized for simple fabrication and driving and allows for two-terminal operation by a single source. The presented concept for color-tunable OLEDs is compatible with application requirements and versatile in terms of emitter combinations.

关键词

Keywords

alternating currentcolor mixingcolor tuningvertical stackingwhite organic light-emitting devices

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Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden

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