Title:
FLUOROPHORE AND LIGHT-EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/124480
Kind Code:
A1
Abstract:
A fluorophore obtained from a europium-activated sialon crystal having an elemental composition represented by formula (1)
(Sr1-x, Eux)αSiβAlγOδNω (1)
(in the formula, x is 0 < x < 1, α is 0 <α ≤ 4, and β, γ, δ, and ω are numbers such that the converted numerical values when α is 3 satisfy 9 <β ≤ 15, 1 ≤ γ ≤ 5, 0.5 ≤ δ ≤ 3, and 10 ≤ ω ≤ 25), and said sialon crystal comprises at least one kind of non-Eu rare earth element selected from among Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in a proportion of 0.1 mass% to 10 mass%. The fluorophore emits green light when excited with ultraviolet light, violet light or blue light.
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Inventors:
USUI DAICHI
SHIRAKAWA YASUHIRO
TAKEMURA HIROFUMI
SHIRAKAWA YASUHIRO
TAKEMURA HIROFUMI
Application Number:
PCT/JP2012/055120
Publication Date:
September 20, 2012
Filing Date:
February 29, 2012
Export Citation:
Assignee:
TOSHIBA KK (JP)
TOSHIBA MATERIALS CO LTD (JP)
USUI DAICHI
SHIRAKAWA YASUHIRO
TAKEMURA HIROFUMI
TOSHIBA MATERIALS CO LTD (JP)
USUI DAICHI
SHIRAKAWA YASUHIRO
TAKEMURA HIROFUMI
International Classes:
C09K11/64; H01L33/50
Domestic Patent References:
| WO2007037059A1 | 2007-04-05 | |||
| WO2006093298A1 | 2006-09-08 |
Foreign References:
| JP2010268004A | 2010-11-25 | |||
| JP2010106127A | 2010-05-13 | |||
| JP2004182781A | 2004-07-02 | |||
| JP2006213910A | 2006-08-17 |
Attorney, Agent or Firm:
TOKYO INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Tokyo international patent firm (JP)
Patent business corporation Tokyo international patent firm (JP)
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