Bonding of phosphor converter emitters
Embodiments include a device having a component with a component surface; a phosphor converter body with a phosphor converter body surface facing the component surface; a plurality of particles between and in contact with the component surface and the phosphor converter body surface; and an inorganic coating on and in contact with at least a portion of the particles, at least a portion of the component surface, and at least a portion of the phosphor converter body surface, and a method making such device.
1. A device comprising:
a component having a component surface;
a phosphor converter body bonded to the component and having a phosphor converter body surface facing the component surface; and
a bonding layer between the component and the phosphor converter body, the bonding layer comprising
a plurality of particles between and in contact with the component surface and the phosphor converter body surface; and
an inorganic coating on and in contact with at least a portion of the particles, at least a portion of the component surface, and at least a portion of the phosphor converter body surface.
2. The device of claim 1 , wherein the particles have a size of between D50>0.2 μm and <20 μm.
3. The device of claim 1 , wherein the particles comprise a non-luminescent material.
4. The device of claim 3 , wherein the particles comprise at least one of Al 2 O 3 , SiO 2 , MgO 2 , SnO 2 , TiO 2 , or ZnO 2 .
5. The device of claim 1 , wherein the particles comprise a luminescent material.
6. The device of claim 5 , wherein the luminescent material is a same material as in the phosphor converter body.
7. The device of claim 1 , wherein a distance between the component surface and the phosphor converter body surface is between 0.2 μm and 30 μm.
8. The device of claim 1 , wherein the inorganic coating comprises a metal oxide.
9. The device of claim 1 , wherein the inorganic coating comprises at least one of Al 2 O 3 , SiO 2 , SnO 2 , CrO 2 , ZrO 2 , HfO 2 , Ta 2 O 5 , TiO 2 , ZnO, TiN, TaN, V 2 O 5 , PtO 2 , B 2 O 3 , or CdS.
10. The device of claim 1 , wherein the inorganic coating has a thickness of between 50 nm and 500 nm.
11. The device of claim 1 , wherein the phosphor converter body is a ceramic phosphor tile.
12. The device of claim 1 , wherein the component comprises a light emitting diode and the upper surface is GaN.
13. A method comprising:
depositing a plurality of particles onto a surface of a component;
placing a phosphor converter body on the particles opposite the component; and
depositing an inorganic coating onto the particles between a component and the phosphor converter body using atomic layer deposition.
14. The method of claim 13 , wherein the particles have a size D50 of >0.2 μm and <20 μm.
15. The method of claim 13 , wherein the inorganic coating has a thickness between 50 nm and 500 nm and comprises at least one of Al 2 O 3 , SiO 2 , SiO 2 , SnO 2 , CrO 2 , ZrO 2 , HfO 2 , Ta 2 O 5 , TiO 2 , ZnO, TiN, TaN, V 2 O 5 , PtO 2 , B 2 O 3 , or CdS.