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US 11,056,540 B2Granted
Plasmonic PHOLED arrangement for displays
AssigneeUniversal Display Corporation
InventorsNicholas J. Thompson, Michael S. Weaver, Michael Fusella
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Abstract
Device structures are provided that include one or more plasmonic OLEDs and zero or more non-plasmonic OLEDs. Each plasmonic OLED includes an enhancement layer that includes a plasmonic material which exhibits surface plasmon resonance that non-radiatively couples to an organic emissive material and transfers excited state energy from the emissive material to a non-radiative mode of surface plasmon polaritons in the plasmonic OLED.
Claims16
A device comprising:
- a first plasmonic organic light emitting diode (OLED) stack, the first plasmonic OLED stack comprising:
- a first electrode;
- a first charge generation layer;
- and
- a first organic emissive layer disposed between the first electrode and the first charge generation layer and within a threshold distance of the first electrode, the first organic emissive layer comprising a first organic emissive material, wherein the threshold distance is the distance at which a total non-radiative decay rate constant of the first organic emissive material is equal to a total radiative decay rate constant of the first organic emissive material;
- and
- a second plasmonic OLED stack, disposed in a stack with the first plasmonic OLED stack, the second plasmonic OLED stack comprising:
- the first charge generation layer;
- a second charge generation layer;
- and
- a second organic emissive layer comprising a second organic emissive material, disposed between the first charge generation layer and the second charge generation layer and within a threshold distance of the first charge generation layer or the second charge generation layer, wherein the threshold distance is the distance at which a total non-radiative decay rate constant of the second organic emissive material is equal to a total radiative decay rate constant of the second organic emissive material;
- and
- a first non-plasmonic OLED stack disposed in a stack with the first and second plasmonic OLED stacks, the first non-plasmonic OLED stack comprising:
- the second charge generation layer;
- a second electrode;
- and
- a third organic emissive layer disposed between the second charge generation layer and the second electrode;
- wherein:
- the first non-plasmonic OLED is disposed over the second electrode,
- the second plasmonic OLED is disposed over the first non-plasmonic OLED, and
- the first plasmonic OLED is disposed over the second plasmonic OLED.
18 more elements
A device comprising:
- a first plasmonic organic light emitting diode (OLED) stack, the first plasmonic OLED stack comprising:
- a first electrode;
- a first charge generation layer;
- and
- a first organic emissive layer disposed between the first electrode and the first charge generation layer and within a threshold distance of the first electrode, the first organic emissive layer comprising a first organic emissive material, wherein the threshold distance is the distance at which a total non-radiative decay rate constant of the first organic emissive material is equal to a total radiative decay rate constant of the first organic emissive material;
- and
- a second plasmonic OLED stack, disposed in a stack with the first plasmonic OLED stack, the second plasmonic OLED stack comprising:
- the first charge generation layer;
- a second charge generation layer;
- and
- a second organic emissive layer comprising a second organic emissive material, disposed between the first charge generation layer and the second charge generation layer and within a threshold distance of the first charge generation layer, wherein the threshold distance is the distance at which a total non-radiative decay rate constant of the second organic emissive material is equal to a total radiative decay rate constant of the second organic emissive material;
- and
- a first non-plasmonic OLED stack disposed in a stack with the first and second plasmonic OLED stacks, the first non-plasmonic OLED stack comprising:
- the second charge generation layer;
- a second electrode;
- and
- a third organic emissive layer disposed between the second charge generation layer and the second electrode;
- wherein the first non-plasmonic OLED is disposed between the first and second plasmonic OLEDs.
15 more elements
Dependencies are inferred from the claim text.