Coatings for Photoluminescent Materials

摘要

The teachings are generally directed to phosphors having combination coatings with multifunctional characteristics that increase the performance and/or reliability of the phosphor. The teachings include highly reliable phosphors having coatings that contain more than one inorganic component, more than one layer, more than one thicknesses, more than one combination of layers or thicknesses, a gradient-interface between components, a primer thickness or layer to inhibit or prevent leaching of phosphor components into the coatings, a sealant layer to inhibit or prevent entry of moisture or oxygen from the environment, a mixed composition layer as a sealant and multifunctional combination coatings.

主权项

1. A coated photoluminescent material, said coating being a multifunctional coating comprising:
a photoluminescent material having a surface; and at least two oxides, the two oxides including:
a primer material having a primer thickness on the surface of said photoluminescent material, said primer thickness functioning to at least inhibit a leaching of a component of said photoluminescent material into said coating; andan outermost, sealant material having a sealant thickness that functions to inhibit or prevent oxygen and moisture from diffusing through said coating and into said photoluminescent material;wherein said at least two oxides are selected from the group consisting of metal oxides and semiconductor oxides.