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Stable Blue Phosphorescent Organic Light Emitting Devices

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Novel combination of materials and device architectures for organic light emitting devices is provided. An organic light emitting device, is provided, having an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer includes a host and a phosphorescent emissive dopant having a peak emissive wavelength less than 500 nm, and a radiative phosphorescent lifetime less than 1 microsecond. Preferably, the phosphorescent emissive dopant includes a ligand having a carbazole group.
Forrest, Stephen R. (Ann Arbor, MI), Thompson, Mark (Anaheim, CA), Giebink, Noel (Ann Arbor, MI)
14/ 338,813
July 23, 2014
[0002] The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require that the patent owner to license others on reasonable terms as provided for by the terms of F017391 awarded by Department of Energy.