Electroluminescent device with stabilized cathode

Details Electroluminescent device with stabilized cathode Electroluminescent device with stabilized cathode

H - Electricity

05

B

H05B 33/26 (2006.01) H01L 51/52 (2006.01) H05B 33/04 (2006.01) H05B 33/12 (2006.01) H05B 33/14 (2006.01) H05B 33/22 (2006.01)

Patent

CA 2046243

An organic electroluminescent device is disclosed which is protected from dark spot formation. The device is comprised of, in sequence, a support, an anode, an organic electroluminescent medium, and a cathode. The cathode contains a plurality of metals, at least one of which is a low work function metal other than an alkali metal. Overlying the cathode is a protective layer comprised of a mixture of at least one organic component of the organic electroluminescent medium and at least one metal having a work function in the range of from 4.0 to 4.5 eV capable of being oxidized in the presence of ambient moisture.

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