H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 33/26 (2006.01) C09K 11/06 (2006.01) H01L 51/52 (2006.01) H05B 33/14 (2006.01)
Patent
CA 2046220
An organic electroluminescent device is disclosed which is protected from dark spot forma- tion. The device is comprised of, in sequence, a support, an anode, an organic electroluminescent medium, and a cathode containing a plurality of metals other than alkali metals. The cathode is comprised of a capping layer containing at least one alkaline earth or rare earth metal and, interposed between the capping layer and the organic electrolu- minescent medium, an electron injecting layer containing at least one metal having a work function of less than 4.0, but exhibiting a higher work func- tion than the alkaline earth or rare earth metals in the capping layer.
Littman Jon Eric
Scozzafava Michael
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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