Ovjp for printing graded/stepped organic layers
AssigneeUniversal Display Corporation
InventorsSiddharth HARIKRISHNA MOHAN, Paul E. BURROWS
Life of this patent
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Abstract
An emissive layer deposited in graded manner using a plurality of nozzles is disclosed. A mixtures ejected from the plurality of nozzles may contain varying concentrations of host-to-dopant material. The nozzles, as disclosed, may be arranged in a sequential manner such that the order of the sequence is based on varying concentration of the host-to-dopant material. The nozzles may be configured to translate relative to an area of a substrate to allow sequential deposition.
Claims16
A device comprising:
- a first nozzle configured to eject a first mixture over a first region of a substrate, the first mixture comprising a host and an organic dopant;
- and
- a second nozzle configured to eject a second mixture over the first region of the substrate, the second mixture comprising the host and the organic dopant;
- wherein the first mixture comprises a different ratio of host to organic dopant than the second mixture.
A method comprising:
- depositing a plurality of mixtures over a first region of a substrate, each mixture comprising a carrier gas, an organic emissive first material and a host second material;
- wherein each mixture comprises a different ratio of the organic emissive first material to the host second material.
A device fabricated according to the method recited in 10, wherein the device is selected from a group consisting of a flat panel display, a computer monitor, a medical monitor, a television, a billboard, a light for interior or exterior illumination and/or signaling, a heads up display, a fully transparent display, a flexible display, a laser printer, a telephone, a cell phone, a personal digital assistant, a laptop computer, a digital camera, a camcorder, a viewfinder, a micro-display, a vehicle, a large area wall, a theater or stadium screen, and a sign.
A method comprising:
- depositing a first electrode over a substrate;
- ejecting a first mixture comprising an organic emissive first material, a host second material, and a carrier gas from a first nozzle towards the first electrode;
- depositing a second mixture comprising the organic emissive first material, the host second material, and a carrier gas from a second nozzle over the organic emissive first material, the second mixture having a different concentration of the organic emissive material than the first mixture;
- and
- depositing a second electrode over the organic emissive first material.
Dependencies are inferred from the claim text.