Highly reliable photoluminescent materials having a thick and uniform titanium dioxide coating
AssigneeIntematix Corporation
InventorsYi-Qun Li, Xufang Chen, Yuming Xie
Life of this patent
Estimating the term…
Abstract
Described herein are coated photoluminescent materials and methods for preparing such coated photoluminescent materials. More particularly, provided herein are phosphors coated with titanium dioxide, methods for preparing phosphors coated with titanium dioxide, and solid-state light emitting devices which include phosphors coated with titanium dioxide.
Claims20
A photoluminescent material having a thick, uniform coating of titanium dioxide, comprising a photoluminescent material;
- and
- a layer comprising titanium dioxide on a surface of the photoluminescent material;
- wherein, the thickness of the titanium dioxide layer ranges from about 80 nm to about 500 nm.
A method of synthesizing a uniformly coated photoluminescent material, comprising depositing a layer of titanium dioxide on a surface of a photoluminescent material, wherein:
- the titanium dioxide is generated from a precursor of the titanium dioxide in a liquid phase;
- the depositing occurs for a time effective to deposit a uniform layer of the titanium dioxide to a thickness of at least about 80 nm on the surface of the photoluminescent material in a single coating cycle;
- and,
- the titanium dioxide is deposited on the surface at a rate of between about 1 nm and about 100 nm per hour.
A light emitting device, comprising
- a solid-state light emitter;
- and
- a coated photoluminescent material including a uniform layer of titanium dioxide on a surface of a photoluminescent material;
- wherein, the thickness of the titanium dioxide layer ranges from between about 200 nm to about 500 nm.
Dependencies are inferred from the claim text.