Skip to Content
Find More Like This
Return to Search

Organic light emitting device structure for obtaining chromaticity stability

United States Patent

May 1, 2007
View the Complete Patent at the US Patent & Trademark Office
The present invention relates to organic light emitting devices (OLEDs). The devices of the present invention are efficient white or multicolored phosphorescent OLEDs which have a high color stability over a wide range of luminances. The devices of the present invention comprise an emissive region having at least two emissive layers, with each emissive layer comprising a different host and emissive dopant, wherein at least one of the emissive dopants emits by phosphorescence.
Tung; Yeh-Jiun (Princeton, NJ), Ngo; Tan (Levittown, PA)
Universal Display Corporation (Ewing, NJ)
10/ 761,980
January 20, 2004
GOVERMENT RIGHTS This invention was made with Government support under Contract No. DE-FG02-02ER83565 awarded by the Department of Energy. The government has certain rights in this invention.