Single-band upconversion luminescent material and method for producing the same

Patent metadata

Field	Value
Publication number	US-10927296-B2
Application number	US-201916264813-A
Country	US
Kind code	B2
Filing date	Feb 1, 2019
Priority date	Feb 1, 2018
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A single-band upconversion luminescent material includes an amorphous ceramic host; and lanthanide ions doped into the ceramic host.

First claim

What is claimed is:

1. A single-band upconversion luminescent material comprising:
an amorphous ceramic host; and
lanthanide ions doped into the ceramic host.

2. The single-band upconversion luminescent material of claim 1 , wherein the amorphous ceramic host is an amorphous matrix resulting from liquid-quenching of a crystalline ceramic.

3. The single-band upconversion luminescent material of claim 1 , wherein the amorphous ceramic host has a non-glass state.

4. The single-band upconversion luminescent material of claim 1 , wherein the ceramic amorphous host has a relative value Ω r 2 (Ω 2 /ΣΩ λ ) of Judd-Ofelt parameters Ω 2 , Ω 4 and Ω 6 being equal to or greater than 0.75.

5. The single-band upconversion luminescent material of claim 1 , wherein the amorphous ceramic host is a host containing NaYF 4 or Y 2 O 3 .

6. The single-band upconversion luminescent material of claim 5 , wherein the lanthanide ions include Er 3+ or Tm 3+ ions.

7. The single-band upconversion luminescent material of claim 6 , wherein the single-band upconversion luminescent material exhibits upconversion emission to blue and green regions.

8. The single-band upconversion luminescent material of claim 6 , wherein the lanthanide ions include Er 3+ ions, wherein the single-band upconversion luminescent material has a 2 H 11/2 → 4 I 15/2 transition possibility.

9. The single-band upconversion luminescent material of claim 6 , wherein the lanthanide ions include Tm 3+ ions, wherein the single-band upconversion luminescent material has a 1 G 4 → 3 H 6 transition possibility.

10. The single-band upconversion luminescent material of claim 1 , wherein the ceramic amorphous host contains an amorphous phase stabilizer.

11. The single-band upconversion luminescent material of claim 10 , wherein the amorphous phase stabilizer includes SiO 2 or TiO 2 .

12. The single-band upconversion luminescent material of claim 1 , wherein the upconversion luminescent material has an asymmetric and covalent bond-based microstructure.

13. The single-band upconversion luminescent material of claim 1 , wherein the upconversion luminescent material has a decay time smaller than or equal to 0.2 μs.

14. A method for producing a single-band upconversion luminescent material, the method comprising:
providing ceramic nanocrystals doped with lanthanide ions;
coating an amorphous phase stabilizer on the ceramic nanocrystals;
fully melting the ceramic nanocrystals to form a melt; and
liquid-quenching the melt.

15. The method of claim 14 , wherein the fully melting comprises fully melting the nanocrystals using a focused laser beam.

16. The method of claim 15 , wherein a diameter of a spot of the laser beam is equal to or smaller than 4 μm.

17. The method of claim 14 , wherein the ceramic nanocrystals include NaYF 4 or Y 2 O 3 nanocrystals.

18. The method of claim 14 , wherein the ceramic of the ceramic nanocrystals includes NaYF 4 or Y 2 O 3 .

19. The method of claim 14 , wherein the lanthanide ions include Er 3+ or Tm 3+ ions.

20. The method of claim 14 , wherein the amorphous phase stabilizer includes SiO 2 or TiO 2 .

21. A single-band upconversion luminescent material produced using the method of claim 14 , wherein the single-band upconversion luminescent material comprises:
an amorphous ceramic host; and
lanthanide ions doped into the ceramic host.

22. The single-band upconversion luminescent material of claim 21 , wherein the amorphous ceramic host has a non-glass state.

23. The single-band upconversion luminescent material of claim 21 , wherein the ceramic amorphous host has a relative value Ω r 2 (Ω 2 /ΣΩ λ ) of Judd-Ofelt parameters Ω 2 , Ω 4 and Ω 6 being equal to or greater than 0.75.

24. The single-band upconversion luminescent material of claim 21 , wherein the upconversion luminescent material has an asymmetric and covalent bond-based microstructure.

25. The single-band upconversion luminescent material of claim 21 , wherein the single-band upconversion luminescent material has a 2 H 11/2 → 4 I 15/2 transition possibility.

26. The single-band upconversion luminescent material of claim 21 , wherein the upconversion luminescent material has a decay time smaller than or equal to 0.2 μs.

27. The single-band upconversion luminescent material of claim 21 , wherein the amorphous ceramic host is a host containing NaYF 4 or Y 2 O 3 .

28. The single-band upconversion luminescent material of claim 27 , wherein the lanthanide ions include Er 3+ or Tm 3+ ions.

29. The single-band upconversion luminescent material of claim 10 , wherein the amorphous phase stabilizer includes SiO 2 or TiO 2 .

30. The single-band upconversion luminescent material of claim 28 , wherein the single-band upconversion luminescent material exhibits upconversion emission to blue and green regions.

31. The single-band upconversion luminescent material of claim 27 , wherein the lanthanide ions include Er 3+ ions, wherein the single-band upconversion luminescent material has a 2 H 11/2 → 4 I 15/2 transition possibility.

32. The single-band upconversion luminescent material of claim 27 , wherein the lanthanide ions include Tm 3+ ions, wherein the single-band upconversion luminescent material has a 1 G 4 → 3 H 6 transition possibility.

Assignees

• Research & Business Found Sungkyunkwan Univ

Inventors

• Kim Dong Hwan
• Moon Byeong Seok

Classifications

• C09K11/7773

  with alkali or alkaline earth metal · CPC title

• C03C4/12

  for luminescent glass; for fluorescent glass · CPC title

• C03C3/325

  Fluoride glasses · CPC title

• C03C3/12

  Silica-free oxide glass compositions · CPC title

• C03C3/095

  containing rare earths · CPC title