US 10,093,854 B2 · Phosphor and light emitting device

Abstract

The present invention relates to a complex oxynitride phosphor which is efficiently excited in the UV to near-UV wavelength region and emits green to yellow light, and a light emitting device using the phosphor. The phosphor according to the present invention is characterized in that it is represented by general formula: M1aM2bRecSidOeNf; wherein M1 is one or more elements selected from Y, Sc, La, and Al; M2 is one or more elements selected from Zn, Sr, Ba, Ca, and Mg; Re is one or more elements selected from Ce, Pr, Sm, Eu, Dy, Ho, Er, Tm, Yb, Ti, Cr, and Mn among rare-earth elements and transition metal elements; and a, b, c, d, e, and fin the formula satisfy the relationships: a+b+c=1, 0.20<b<0.50, 0.001<c<0.10, 2.5<d<4.1, 0.5<e<1.0, and 3.5<f<5.6.

Claims8

Dependent claims

A phosphor represented by general formula:

M1aM2bRecSidOeNf;
wherein M1 is one or more elements selected from Y, Sc, La, and Al;
M2 is one or more elements selected from Zn, Sr, Ba, Ca, and Mg;
Re is one or more elements selected from Ce, Pr, Sm, Eu, Dy, Ho, Er, Tm, Yb, Ti, Cr, and Mn among rare-earth elements and transition metal elements;
and a, b, c, d, e, and fin the formula satisfy the relationships:
a+b+c=1,
0.20<b<0.50,
0.001<c<0.10,
2.5<d<4.1,
0.5<e<1.0, and
3.5<f<5.6.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/106,780Filed 22 Dec 2014

Priority

JP 2013/26904426 Dec 2013

Published

US 2018/0163128 A114 Jun 2018

Granted

9 Oct 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

C09K 11/77927
Containing two or more rare earth metals one of which being europium: silicon Nitrides or Silicon Oxynitrides
C09K 11/0883
Containing inorganic luminescent materials: arsenides; Nitrides; Phosphides
H05B 33/14
Light sources with substantially two-dimensional [2D] radiating surfaces: characterised by the chemical or physical composition or the arrangement…
H10H 20/8513
Wavelength conversion materials: having two or more wavelength conversion materials

Phosphor and light emitting device

Life of this patent

Phosphor and light emitting device

Life of this patent

Abstract

Claims8