Active solid-state devices (e.g. – transistors – solid-state diode – Organic semiconductor material
Reexamination Certificate
2007-05-01
2007-05-01
Huynh, Andy (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Organic semiconductor material
C257S642000, C257S040000
Reexamination Certificate
active
10761980
ABSTRACT:
The present invention relates to organic light emitting devices (OLEDs). The devices of the present invention are efficient white or multicolored phosphorescent OLEDs which have a high color stability over a wide range of luminances. The devices of the present invention comprise an emissive region having at least two emissive layers, with each emissive layer comprising a different host and emissive dopant, wherein at least one of the emissive dopants emits by phosphorescence.
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Ngo Tan
Tung Yeh-Jiun
Huynh Andy
Kenyon & Kenyon LLP
Nguyen Thinh T
Universal Display Corporation
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