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High efficiency and brightness fluorescent organic light emitting diode by triplet-triplet fusion

United States Patent

February 10, 2015
View the Complete Patent at the US Patent & Trademark Office
A first device is provided. The first device further comprises an organic light emitting device. The organic light emitting device further comprises an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer may include an organic host compound and at least one organic emitting compound capable of fluorescent emission at room temperature. Various configurations are described for providing a range of current densities in which T-T fusion dominates over S-T annihilation, leading to very high efficiency fluorescent OLEDs.
Forrest; Stephen (Ann Arbor, MI), Zhang; Yifan (Ann Arbor, MI)
The Regents of the University of Michigan (Ann Arbor, MI)
13/ 600,651
August 31, 2012
This invention was made with government support under DE-SC0001013 awarded by the Department of Energy. The government has certain rights in the invention.