Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2011-04-26
2011-04-26
Tarazano, D. Lawrence (Department: 1786)
Stock material or miscellaneous articles
Composite
Of inorganic material
C313S504000, C544S126000
Reexamination Certificate
active
07931975
ABSTRACT:
An OLED device includes a cathode, an anode, and having there between a light-emitting layer, further including, between the cathode and the light emitting layer, a first layer having a thickness of 20 nm or less and containing a fluoranthene compound including one and only one fluoranthene nucleus and having no aromatic rings annulated to the fluoranthene nucleus, the fluoranthene nucleus having independently selected aromatic groups in the 7,10-positions and a phenanthroline group in the 8-or 9-position. The OLED device desirably includes a second layer containing an alkali metal or an alkali metal compound, located between the cathode and the first layer. The OLED device can also include a polycyclic aromatic compound in the first layer or in a third layer located between the first layer and the light-emitting layer. Devices of the invention provide improvement in features such as efficiency, drive voltage, and operational stability.
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Andrievsky Natasha
Begley William J.
Clark Gregory
Global OLED Technology LLC
McKenna Long & Aldridge LLP
Tarazano D. Lawrence
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