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Intermediate connector for stacked organic light emitting devices

United States Patent

8,372,526
February 12, 2013
View the Complete Patent at the US Patent & Trademark Office
A device is provided, having an anode, a cathode, and an intermediate connector disposed between the anode and the cathode. A first organic layer including an emissive sublayer is disposed between the anode and the intermediate connector, and a second including an emissive sublayer is disposed between the intermediate connector and the cathode. The intermediate connector includes a first metal having a work function lower than 4.0 eV and a second metal having a work function lower than 5.0 eV. The work function of the first metal is at least 0.5 eV less than the work function of the second metal. The first metal is in contact with a sublayer of the second organic layer that includes a material well adapted to receive holes from a low work function metal.
D'Andrade; Brian (Westampton, NJ)
Universal Display Corporation (Ewing, NJ)
12/ 174,286
20100013378
July 16, 2008
The present invention was made under Federal Contract Grant Nos. DE-FG02-06ER84582 and DE-FG02-05ER84263, both sponsored by the Department of Energy, and the government may have certain rights to the subject invention.