Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2008-04-22
2008-04-22
Gray, Jill (Department: 1774)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S112000, C313S504000, C313S506000, C556S032000, C556S146000
Reexamination Certificate
active
10825231
ABSTRACT:
Disclosed are emissive materials of formula (I) or (II), comprising two bidentate NO-type ligands, or a tetradentate NOON-type ligand, and a transition metal. The emissive materials are useful as electrophosphorescent emitters in organic light-emitting devices. Also disclosed are methods for preparing organic light-emitting diodes comprising these emissive materials, and the use of such diodes as white and yellow organic light-emitting devices.
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Chan Siu-Chung
Che Chi-Ming
Dickstein & Shapiro LLP
Gray Jill
The University of Hong Kong
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