Title:
FLUORESCENT SUBSTANCE, PROCESS FOR PRODUCING THE SAME, AND LUMINESCENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/101096
Kind Code:
A1
Abstract:
This invention provides a blue fluorescent substance, which has higher blue brightness and larger half-value width in a luminescence spectrum as compared with the conventional rare earth-activated sialon fluorescent substance and has better durability as compared with the conventional oxide fluorescent substance. The fluorescent substance comprises a metal element M, wherein M represents Ce, dissolved as a solid solution in a nitride or oxynitride crystal having a β-type Si3N4 crystal structure, an AlN crystal structure, or an AlN polytype structure, and emits fluorescence having a peak in a wavelength range of 450 nm to 500 nm upon exposure to light from an excitation source.
Inventors:
HIROSAKI NAOTO (JP)
Application Number:
PCT/JP2006/305610
Publication Date:
September 28, 2006
Filing Date:
March 20, 2006
Export Citation:
Assignee:
NAT INST FOR MATERIALS SCIENCE (JP)
HIROSAKI NAOTO (JP)
HIROSAKI NAOTO (JP)
International Classes:
C09K11/59; C09K11/08; C09K11/64; H01J11/02; H01J29/20; H01J33/00; H01L33/32; H01L33/48; H01L33/50; H01L33/56
Foreign References:
| JP2003096446A | 2003-04-03 | |||
| JPS60206889A | 1985-10-18 | |||
| JP2003336059A | 2003-11-28 | |||
| JP2003203504A | 2003-07-18 | |||
| JP2005008793A | 2005-01-13 | |||
| JP2005255895A | 2005-09-22 |
Other References:
See also references of EP 1873225A4
Attorney, Agent or Firm:
Aikawa, Toshihiko (12-5 Minami Ikebukuro 2-chom, Toshima-ku Tokyo 22, JP)
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