Phosphor, LED light-emission element, and light source device

Patent metadata

Field	Value
Publication number	US-9394478-B2
Application number	US-201314397299-A
Country	US
Kind code	B2
Filing date	Oct 22, 2013
Priority date	Oct 23, 2012
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

Provided is a novel CaS-based phosphor with which chemical reactions can be inhibited even if said CaS-based phosphor is heated with a heterogeneous material. This phosphor includes: a crystalline parent material represented by the composition formula Ca 1-x Sr x S.yZnO (in the formula, 0≦x<1, 0<y≦0.5); and a luminescent center.

First claim

The invention claimed is:

1. A phosphor comprising a host material represented by compositional formula: Ca 1-x Sr x S.yZnO (wherein 0≦x<1, and 0<y≦0.5) and a luminescent center, and also comprising a layer containing a SiO 2 -containing amorphous oxide, wherein the host material contains a substance having a CaZnOS phase structure and the substance having a CaZnOS phase structure exists as particles containing a substance having a CaZnOS phase structure, or exists as a layer containing a substance having a CaZnOS phase structure, on the surface or in the vicinity of the surface of particles formed from a compound represented by formula: Ca 1-x Sr x S (wherein 0≦x<1).

2. The phosphor according to claim 1 , wherein particles formed from a compound represented by Ca 1-x Sr x S (wherein 0≦x<1) and particles containing a substance having a CaZnOS phase structure are present in mixture and form aggregate particles.

3. The phosphor according to claim 1 , wherein the host material contains a substance having a ZnS phase structure.

4. The phosphor according to claim 3 , wherein the substance having a ZnS phase structure exists as particles containing a substance having a ZnS phase structure, or exists as a layer containing a substance having a ZnS phase structure.

5. The phosphor according to claim 1 , comprising Eu as the luminescent center.

6. The phosphor according to claim 1 , wherein the layer containing a SiO 2 -containing amorphous oxide contains B 2 O 3 .

7. The phosphor according to claim 1 , wherein the layer containing a SiO 2 -containing amorphous oxide contains a fluoride compound containing one kind or two or more kinds selected from a group consisting of Ca, Sr, Ba, and Mg.

8. The phosphor according to claim 1 , having a surface treated with an organic coupling agent.

9. A phosphor sheet presenting a sheet form, comprising the phosphor according to claim 1 and a transparent resin.

10. A phosphor molded body comprising a phosphor layer containing the phosphor according to claim 1 , wherein the phosphor molded body is disposed within a sealing layer formed from a transparent resin composition or a glass composition.

11. An LED light-emission element, comprising a phosphor according to claim 1 , a phosphor sheet comprising the phosphor and a transparent resin, or a phosphor molded body-comprising a phosphor layer containing the phosphor, wherein the phosphor molded body is disposed within a sealing layer formed from a transparent resin composition or a glass composition, as a wavelength conversion material.

12. A light source device, having the LED light-emission element according to claim 11 mounted therein.

13. A solar power generation apparatus, comprising a phosphor according to claim 1 , a phosphor sheet comprising the phosphor and a transparent resin, or a phosphor molded body comprising a phosphor layer containing the phosphor, wherein the phosphor molded body is disposed within a sealing layer formed from a transparent resin composition or a glass composition, which receives light including at least light in the ultraviolet region or light in the near-ultraviolet region in sunlight, and emit light in the visible light region; and a solar cell that receives light in the visible light region emitted by the phosphor, and converts the light to an electric signal.

14. The solar power generation apparatus according to claim 13 , having a configuration in which the phosphor is applied on a light condensing surface or a heat collector pipe.

Assignees

• Mitsui Mining & Smelting Co

Inventors

• Inamura Masaaki
• Inoue Michiyo
• Kumagai Akinori
• Shimizu Haruka
• Mori Takayoshi
• Itoh Jun-Ichi

Classifications

• H10H20/8515

  not being in contact with the bodies · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title

• H10F77/45

  Wavelength conversion means, e.g. by using luminescent material, fluorescent concentrators or up-conversion arrangements · CPC title

• C09K11/7731

  with alkaline earth metals · CPC title

• Y02E10/52

  PV systems with concentrators · CPC title