Wavelength conversion structure, manufacturing methods thereof, and lighting emitting device including the wavelength conversion structure
View Patent ↗A wavelength conversion structure comprises a phosphor layer comprising a first part and a second part formed on the first part, wherein the first part and the second part have a plurality of pores, a first material layer formed in the plurality of pores of the first part, a second material layer formed in the plurality of pores of the second part and a plurality of phosphor particles, wherein the plurality of phosphor particles is distributed in the first material layer and the second material layer.
1. A wavelength conversion structure, comprising:
a phosphor layer comprising a first part and a second part formed on the first part, wherein the first part and the second part have a plurality of pores;
a first material layer formed in the plurality of pores of the first part;
a second material layer formed in the plurality of pores of the second part; and
a plurality of phosphor particles,
wherein the plurality of phosphor particles is distributed in the first material layer and the second material layer.
2. A wavelength conversion structure according to claim 1 , further comprises a substrate on a side of the first material layer.
3. A wavelength conversion structure according to claim 2 , wherein the substrate comprises a conductive substrate.
4. A wavelength conversion structure according to claim 1 , wherein the first material layer comprises a metallic oxide, and/or the second material layer comprises silica or glass.
5. A wavelength conversion structure according to claim 1 , wherein the refractive index of the first material layer is between 1.8 and 2, and/or the refractive index of the second material layer is between 1.3 and 1.6.
6. A wavelength conversion structure according to claim 1 , wherein the phosphor layer comprises yellow phosphor.
7. A wavelength conversion structure according to claim 1 , wherein a thickness of the first part is 0.5 to 0.9 times a thickness of the phosphor layer.
8. A wavelength conversion structure according to claim 1 , wherein an upper surface of the second material layer is higher than a top surface of the phosphor layer.
9. A wavelength conversion structure according to claim 2 , wherein a surface of the substrate is a flat surface, a curved surface, or a convex surface.
10. A wavelength conversion structure according to claim 1 , wherein the difference of refractive index between the phosphor layer and the first material layer is smaller than 0.3.
11. A wavelength conversion structure according to claim 2 , wherein the refractive index of the substrate is smaller than that of the phosphor layer.
12. A method of manufacturing a wavelength conversion structure comprising the steps:
providing a substrate;
forming a phosphor layer on the substrate, the phosphor layer comprising a first part and a second part, wherein the first part and the second part comprise a plurality of pores;
forming a first material layer in the plurality of pores of the first part; and
forming a second material layer in the plurality of pores of the second part.
13. A method of manufacturing a wavelength conversion structure according to claim 12 , wherein the phosphor layer is formed on the substrate by electrophoresis or gravity deposition method.
14. A method of manufacturing a wavelength conversion structure according to claim 12 , wherein the first material layer is formed in the plurality of pores of the first part by electroplating method, chemical vapor deposition method, or sol-gel method, and/or the second material layer is formed by filling with glue.
15. A method of manufacturing a wavelength conversion structure according to claim 12 , wherein a thickness of the first part is 0.5 to 0.9 times a thickness of the phosphor layer.
16. A method of manufacturing a wavelength conversion structure according to claim 12 , wherein an upper surface of the second material layer is higher than a top surface of the phosphor layer.
17. A method of manufacturing a wavelength conversion structure according to claim 12 , wherein the refractive index of the substrate is smaller than that of the phosphor layer.
18. A method of manufacturing a wavelength conversion structure according to claim 12 , wherein a thickness of the wavelength conversion structure is uniform or non-uniform.
19. A method of manufacturing a wavelength conversion structure according to claim 12 , wherein the difference of refractive index between the phosphor layer and the first material layer is smaller than 0.3.
20. A light-emitting device, comprising:
a substrate;
a light-emitting unit disposed on the substrate;
a first light guide layer covering the light-emitting unit on the substrate; and
a wavelength conversion structure on the first light guide layer, wherein the wavelength conversion structure comprises:
a phosphor layer comprising a first part and a second part, wherein the first part on the first light guide layer, the second part on the first part, and the first part and the second part have a plurality of pores;
a first material layer formed in the plurality of pores of the first part; and
a second material layer formed in the plurality of pores of the second part.