07285907 is referenced by 32 patents and cites 38 patents.

The present invention relates to efficient organic light emitting devices (OLEDs) doped with multiple light-emitting dopants, at least one dopant comprising a phosphorescent emitter, in a thin film emissive layer or layers. The present invention is directed to an efficient phosphorescent organic light emitting device utilizing a plurality of emissive dopants in an emissive region, wherein at least one of the dopants is a phosphorescent material. Thus, the present invention provides an organic light emitting device comprising an emissive region, wherein the emissive region comprises a host material, and a plurality of emissive dopants, wherein the emissive region is comprised of a plurality of bands and each emissive dopant is doped into a separate band within the emissive region, and wherein at least one of the emissive dopants emits light by phosphorescence.

Title
High efficiency multi-color electro-phosphorescent OLEDs
Application Number
11/211385
Publication Number
7285907 (B2)
Application Date
August 24, 2005
Publication Date
October 23, 2007
Inventor
Stephen R Forrest
Princeton
NJ, US
Mark E Thompson
Anaheim
CA, US
Brian D Andrade
Princeton
NJ, US
Agent
Kenyon & Kenyon
Assignee
The Trustees of Princeton University
NJ, US
The University of Southern California
CA, US
IPC
H05B 33/14
H01L 51/54
H01L 51/50
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