Active solid-state devices (e.g. – transistors – solid-state diode – Organic semiconductor material
Reexamination Certificate
2007-11-13
2007-11-13
Lee, Eugene (Department: 2815)
Active solid-state devices (e.g., transistors, solid-state diode
Organic semiconductor material
C257SE51001, C257SE51008, C257SE51018, C257SE51019
Reexamination Certificate
active
10472401
ABSTRACT:
An OLED includes a wide gap inert host material doped with two dopants. One of the dopants is an emissive phosphorescent material that can transport either electrons or holes. The other dopant is a charge carrying material that can transport whichever of the electrons and holes that is not transported by the phosphorescent dopant. The materials are selected so that the lowest triplet energy level of the host material and the lowest triplet energy level of the charge carrying dopant material are each at a higher energy level than the lowest triplet state energy level of the phosphorescent dopant material. The device is capable, in particular, of efficiently emitting light in the blue region of the visible spectrum.
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Supplementary European Search Report for European Patent Application No.: 02750605, mailed on Mar. 19, 2007.
Forrest Stephen
Thompson Mark E.
Kenyon & Kenyon LLP
Lee Eugene
The Trustees of Princeton University
The University of Southern California
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