Title:
PHOSPHOR, PROCESS FOR PRODUCING THE SAME, AND LUMINESCENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/066733
Kind Code:
A1
Abstract:
This invention provides a green phosphor for emitting light in an ultraviolet and visible light region, which phosphor has higher green light brightness than the conventional rare earth-activated sialon phosphor, has higher durability than the conventional oxide phosphor, and exhibits a sharp spectrum. The phosphor is characterized in that Al and a metal element M, wherein M represents Eu, are dissolved in a solid solution form in a crystal of a nitride or oxynitride having a β-type Si3N4 crystal structure, the content of oxygen in the crystal is not more than 0.8% by mass, and, upon exposure to an excitation source, the phosphor emits visible light having a luminescence peak wavelength in the range of 450 nm to 650 nm. The luminescence spectrum has a sharp spectrum shape. There are also provided a process for producing the phosphor and a lighting equipment and image display device using the phosphor.
Inventors:
HIROSAKI, Naoto (2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 3050047, JP)
Application Number:
JP2006/324478
Publication Date:
June 14, 2007
Filing Date:
December 07, 2006
Export Citation:
Assignee:
National Institute for Materials Science (2-1 Sengen 1-chome, Tsukuba-shi Ibaraki, 47, 3050047, JP)
独立行政法人物質・材料研究機構 (〒47 茨城県つくば市千現一丁目２番地１ Ibaraki, 3050047, JP)
独立行政法人物質・材料研究機構 (〒47 茨城県つくば市千現一丁目２番地１ Ibaraki, 3050047, JP)
International Classes:
C09K11/64; C09K11/08; H01J1/62; H01J11/02; H01J29/20; H01J31/12; H01J31/15; H01L33/50
Attorney, Agent or Firm:
AIKAWA, Toshihiko (Nakano Bldg. #3, 12-5 Minami Ikebukuro 2-chome, Toshima-ku Tokyo 22, 1710022, JP)