Highly Efficient Blue Organic Light Emitting Device Using Indium-Free Transparent Anode Ga:ZnO with Scalability for Large Area Coating

Liang Wang, Dean W. Matson, Evgueni Polikarpov, James S. Swensen, Charles C. Bonham, Lelia Cosimbescu, Joseph J. Berry, David S. Ginley, Daniel J. Gaspar, Asanga B. Padmaperuma

Research output: Contribution to journalArticlepeer-review

22 Scopus Citations

Abstract

Organic light emitting devices have been achieved with an indium-free transparent anode, Ga doped ZnO (GZO). A large area coating technique was used (RF magnetron sputtering) to deposit the GZO films onto glass. The respective organic light emitting devices exhibited an operational voltage of 3.7 V, an external quantum efficiency of 17%, and a power efficiency of 39 lm/W at a current density of 1 mA/cm2. These parameters are well within acceptable standards for blue OLEDs to generate a white light with high enough brightness for general lighting applications. It is expected that high-efficiency, long-lifetime, large area, and cost-effective white OLEDs can be made with these indium-free anode materials.

Original languageAmerican English
Article numberArticle No. 043103
Number of pages8
JournalJournal of Applied Physics
Volume107
Issue number4
DOIs
StatePublished - 2010

NREL Publication Number

  • NREL/JA-520-48037

Keywords

  • conductive oxide coatings
  • light emitting device
  • OLED

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