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Stable blue phosphorescent organic light emitting devices

United States Patent

August 26, 2014
View the Complete Patent 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)
The Regents of the University of Michigan (Ann Arbor, MI), University of Southern California (Los Angeles, CA)
12/ 257,638
October 24, 2008
This invention was made with government support under DE-FC26-04NT42272, awarded by the U.S. Department of Energy. The government has certain rights in the invention.