Systems and methods for fluoride ceramic phosphors for LED lighting
The present disclosure relates to a lighting component which may comprise a light emitting diode (LED) or laser diode (LD) for generating at least one of blue light or ultraviolet light. A fluoride phosphor matrix may be included, which may be consolidated into a phosphor ceramic structure including at least one of a transparent fluoride ceramic structure or a translucent fluoride ceramic structure, and positioned adjacent to the LED or LD. The phosphor ceramic structure generates at least one of red or orange light when irradiated by the light emitted from the LED or LD. The phosphor ceramic structure exhibits reduced thermal quenching relative to a fluoride particulate structure irradiated by the LED or LD.
1. A method for forming a light modifying structure, the method comprising:
heating a composite powder including a fluoride powder and a phosphor powder including a plurality of distinct additional phosphor particles to a temperature within a predetermined temperature range to form a heated powder; and
applying pressure to the heated composite powder within a predetermined pressure range to form a fluoride phosphor matrix including the plurality of distinct additional phosphor particles dispersed therein, a first amount of relative photon emissions of the distinct additional phosphor particles being greater than a second amount of relative photon emissions of the fluoride phosphor matrix, the fluoride phosphor matrix with the plurality of distinct additional phosphor particles defining the light modifying structure.
2. The method of claim 1 , wherein the predetermined temperature range is greater than or equal to about 150° C. to less than or equal to about 400° C.
3. The method of claim 2 , wherein the predetermined pressure range is greater than or equal to about 6,894 kPa to less than or equal to about 137,895 kPa.
4. The method of claim 1 , wherein the method further includes preparing the composite powder, the preparation of the composite powder including contacting the fluoride powder and the phosphor powder.
5. The method of claim 4 , wherein the preparation of the composite powder further includes applying a mixing force to the fluoride powder and the phosphor powder to form a homogeneous composite powder.
6. A method for forming a single-layered phosphor composite structure, the method comprising:
consolidating a composite powder including a fluoride powder and a phosphor powder including a plurality of distinct additional phosphor particles to form a fluoride phosphor matrix including the plurality of distinct additional phosphor particles dispersed therein, a first amount of relative photon emissions of the distinct additional phosphor particles being greater than a second amount of relative photon emissions of the fluoride phosphor matrix, the fluoride phosphor matrix with the plurality of distinct additional phosphor particles defining the single-layered phosphor composite structure.
7. The method of claim 6 , wherein the consolidating of the composite powder includes vacuum sintering, controlled atmosphere sintering, hot-pressing, spark plasma sintering, three-dimensional printing, or any combination thereof.
8. The method of claim 7 , wherein the hot-pressing includes heating the composite powder to a temperature greater than room temperature and below the melting or decomposition temperature of the fluoride powder.
9. The method of claim 8 , wherein the temperature is greater than or equal to about 150° C. to less than or equal to about 400° C.
10. The method of claim 8 , wherein the hot-pressing includes applying a pressure to the composite powder, the pressure being greater than or equal to about greater than or equal to about 6,894 kPa to less than or equal to about 137,895 kPa.
11. The method of claim 6 , wherein the method further includes preparing the composite powder, the preparation of the composite powder including contacting the fluoride powder and the phosphor powder.
12. The method of claim 11 , wherein the preparation of the composite powder further includes applying a mixing force to the fluoride powder and the phosphor powder to form a homogeneous composite powder.
13. The method of claim 6 , wherein the fluoride phosphor matrix includes a cubic or near-cubic K 2 PtCl 6 structure type.
14. The method of claim 6 , wherein the fluoride phosphor matrix comprises M 2 M′F 6 , where M is selected from the group consisting of: Li, Na, K, Rb, Cs, and combinations thereof, and M′ is selected from the group consisting of: Si, Ge, Sn, Ti, Zr, Hf, and combinations thereof.
15. The method of claims 6 , wherein the fluoride phosphor matrix comprises K 2 SiF 6 , Li 2 SiF 6 , Na 2 SiF 6 , Rb 2 SiF 6 , Cs 2 SiF 6 , K 2 GeF 6 , Li 2 GeF 6 , Na 2 GeF 6 , Rb 2 GeF 6 , Cs 2 GeF 6 , Li 2 SnF 6 , Na 2 SnF 6 , Rb 2 SnF 6 , Cs 2 SnF 6 , K 2 ZrF 6 , Li 2 ZrF 6 , Na 2 ZrF 6 , Rb 2 ZrF 6 , Cs 2 ZrF 6 , K 2 HfF 6 , Li 2 HfF 6 , Na 2 HfF 6 , Rb 2 HfF 6 , Cs 2 HfF 6 , K 2 TiF 6 , Li 2 TiF 6 , Na 2 TiF 6 , Rb 2 TiF 6 , Cs 2 TiF 6 , or any mixtures or solid solutions thereof.
16. The method of claim 6 , wherein the plurality of distinct additional phosphor particles comprises an oxide phosphor, the oxide phosphor including Ce-doped (Lu,Gd,Y) 3 (Al,Ga) 5 O 12 garnet compounds.
17. The method of claim 6 , wherein the plurality of distinct additional phosphor particles comprises an oxide phosphor, a nitride phosphor, an oxynitride phosphor, a sulfide phosphor, an oxysulfide phosphor, a selenide phosphor, or any combination thereof.
18. A method for forming a fluoride phosphor matrix, the method comprising:
contacting a fluoride powder and a phosphor powder to form a composite powder, the phosphor powder including a plurality of distinct additional phosphor particles;
consolidating the composite powder to form the fluoride phosphor matrix, the fluoride phosphor matrix including the distinct additional phosphor particles homogeneously distribute throughout, a first amount of relative photon emissions of the distinct additional phosphor particles being greater than a second amount of relative photon emissions of the fluoride phosphor matrix.
19. The method of claim 18 , wherein the consolidating of the composite powder includes heating the composite powder to a temperature is greater than or equal to about 150° C. to less than or equal to about 400° C.
20. The method of claim 18 , wherein the consolidating of the composite powder includes applying a pressure to the composite powder, the pressure being greater than or equal to about 68.04 atm to less than or equal to about 1360.91 atm.