Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2008-06-03
2008-06-03
Yamnitzky, Marie (Department: 1794)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S504000, C257S040000, C257SE51044, C546S002000, C546S004000, C546S005000, C548S101000, C548S103000, C548S110000, C548S402000, C544S225000
Reexamination Certificate
active
07381479
ABSTRACT:
Emissive phosphorescent organometallic compounds are described that produce improved electroluminescence, particularly in the blue region of the visible spectrum. Organic light emitting devices employing such emissive phosphorescent organometallic compounds are also described. Also described is an organic light emitting layer including a host material having a lowest triplet excited state having a decay rate of less than about 1 per second; a guest material dispersed in the host material, the guest material having a lowest triplet excited state having a radiative decay rate of greater than about 1×105or about 1×106per second and wherein the energy level of the lowest triplet excited state of the host material is lower than the energy level of the lowest triplet excited state of the guest material.
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Adachi Chihaya
Adamovich Vadim
Baldo Marc A.
Djurovich Peter I.
Forrest Stephen R.
Kenyon & Kenyon LLP
The Trustees of Princeton University
The University of Southern California
Universal Display Corporation
Yamnitzky Marie
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