Skip to Content
Find More Like This
Return to Search

Organic light emitting device architecture for reducing the number of organic materials

United States Patent

8,040,053
October 18, 2011
View the Complete Patent at the US Patent & Trademark Office
An organic light emitting device is provided. The device includes an anode and a cathode. A first emissive layer is disposed between the anode and the cathode. The first emissive layer includes a first non-emitting organic material, which is an organometallic material present in the first emissive layer in a concentration of at least 50 wt %. The first emissive layer also includes a first emitting organic material. A second emissive layer is disposed between the first emissive layer and the cathode, preferably, in direct contact with the first emissive layer. The second emissive material includes a second non-emitting organic material and a second emitting organic material. The first and second non-emitting materials, and the first and second emitting materials, are all different materials. A first non-emissive layer is disposed between the first emissive layer and the anode, and in direct contact with the first emissive layer. The first non- emissive layer comprises the first non-emissive organic material.
D'Andrade; Brian (Westampton, NJ), Esler; James (Levittown, PA)
Universal Display Corporation (Ewing, NJ)
12/ 332,945
20090200927
December 11, 2008
The invention was made with government support under Federal Contract Grants: Department of Energy DE FG02-06ER84582 and DE-FG02-05ER84263. The government has certain rights in the invention.