Phosphor, phosphor-containing composition and light-emitting unit using phosphor, and image display device and lighting device using light-emitting unit

Patent metadata

Field	Value
Publication number	US-9777213-B2
Application number	US-201514751789-A
Country	US
Kind code	B2
Filing date	Jun 26, 2015
Priority date	Dec 26, 2012
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

The phosphor of the present invention comprises a crystal phase having a chemical composition represented by the following formula [2], the crystal phase having no garnet structure, and the phosphor having an emission peak in a wavelength range of 600 nm to 650 nm by being activated by at least Mn 4+ ,

A 2 aii B 2 bii C 2 cii D 2 dii X 2 xii   formula [2].

First claim

The invention claimed is:

1. A phosphor, comprising a crystal phase having a chemical composition represented by the following formula [1], and having an emission peak in a wavelength range of 600 nm to 650 nm,
A a B b C c D d X x :R  formula [1],

wherein
A represents one or more alkali metal elements,
B represents one or more alkaline earth metal elements,
C represents one or more elements selected from the group consisting of Group 3 elements and Group 13 elements of the periodic table,
D represents one or more elements selected from the group consisting of Group 4 elements and Group 14 elements of the periodic table,
X represents one or more halogen elements that include at least F,
R represents an element that includes at least a tetravalent Mn, and
a, b, c, d, and x each represent a number that satisfies
0<a<2,
0<b<1,
0<c<1,
0<d≦1,

0.8≦c+d≦1.2,

and
5.0≦x≦7.0.

2. A phosphor, comprising a crystal phase having a chemical composition represented by the following formula [2], the crystal phase having no garnet structure, and the phosphor having an emission peak in a wavelength range of 600 nm to 650 nm by being activated by at least Mn 4+ ,
A 2 aii B 2 bii C 2 cii D 2 dii X 2 xii tm formula [2],
wherein
A 2 represents one or more alkali metal elements,
B 2 represents one or more alkaline earth metal elements,
C 2 represents one or more elements selected from the group consisting of Group 3 elements and Group 13 elements of the periodic table,
D 2 represents one or more elements selected from the group consisting of Group 4 elements and Group 14 elements of the periodic table,
X 2 represents one or more halogen elements, and
aii, bii, cii, dii, and xii each represent a number that satisfies
0≦aii<1,

0<bii<1,
0<cii<1,
0≦dii<1,

0<xii<1,
and
aii+bii+cii+dii+xii=1.

3. The phosphor according to claim 2 , wherein
the ratio (Z2/Z8) of the number (Z2) of the alkaline earth metal elements contained as B 2 with respect to the total number (Z8) of elements contained in the phosphor is 0.05 or more, and
the ratio (Z3/Z8) of the number (Z3) of the elements C 2 with respect to the total number (Z8) of elements contained in the phosphor is 0.02 or more.

4. The phosphor according to claim 2 , wherein
B 2 is one or more elements selected from the group consisting of Mg, Ca, Sr, and Ba,
C 2 is one or more elements selected from the group consisting of Al, Ga, In, Sc, and Y, and
X 2 is one or more halogen elements that include at least F.

5. The phosphor according to claim 2 , wherein
C 2 is one or more elements that include at least Al, and
the ratio (Z4/Z8) of the number (Z4) of Al elements contained as C 2 with respect to the total number (Z8) of elements contained in the phosphor is 0.01 or more.

6. A phosphor, comprising a crystal phase having a chemical composition represented by the following formula [3], the crystal phase having no garnet structure, and the phosphor having an emission peak in a wavelength range of 600 nm to 650 nm,
A 3 aiii B 3 biii C 3 ciii D 3 diii X 3 xiii Y 3 diii :R 3   formula [3],

wherein
A 3 represents one or more alkali metal elements,
B 3 represents one or more alkaline earth metal elements,
C 3 represents one or more elements selected from the group consisting of Group 3 elements and Group 13 elements of the periodic table,
D 3 represents one or more elements selected from the group consisting of Group 4 elements and Group 14 elements of the periodic table,
X 3 represents one or more halogen elements that include at least F,
Y 3 represents one or more Group 16 elements of the periodic table,
R 3 represents an element that includes at least a tetravalent Mn, and
aiii, biii, ciii, diii, and xiii each represent a number that satisfies
0.8≦aiii≦1.2,

0.8≦biii≦1.2,

0≦ciii≦1.2,

0≦diii≦1,

0.8≦ciii+diii≦1.2,

5.0≦xiii≦7.0,

and
5.0≦xiii+diii≦7.0.

7. The phosphor according to claim 6 , wherein
A 3 is one or more elements selected from the group consisting of Li, Na, K, Rb, and Cs,
B 3 is one or more elements selected from the group consisting of Mg, Ca, Sr, and Ba,
C 3 is one or more elements selected from the group consisting of Al, Ga, ln, Sc, and Y, and
X 3 is one or more halogen elements that include at least F.

8. The phosphor according to claim 6 , wherein
D 3 is one or more elements selected from the group consisting of Ti, Zr, Hf, Si, Ge, and Sn, and
Y 3 includes at least O.

9. The phosphor according to claim 6 , wherein the chemical composition represented by the formula [3]is represented by the following formula [4],
(A 4 aiv B 4 biv ,) 2 (C 4 civ D 4 div E 4 eiv ) 2 (x 4 xiv Y 4 yiv ) 7 :R 4   formula [4]

wherein
A 4 represents one or more alkali metal elements,
B 4 represents one or more alkaline earth metal elements,
C 4 represents one or more alkaline earth metal elements different from B 4 ,
D 4 represents one or more elements selected from the group consisting of Group 3 elements and Group 13 elements of the periodic table,
E 4 represents one or more elements selected from the group consisting of Group 4 elements and Group 14 elements of the periodic table,
X 4 represents one or more halogen elements that include at least F,
Y 4 represents one or more Group 16 elements of the periodic table,
R 4 represents an element that includes at least a tetravalent Mn, and
aiv, biv, civ, div, eiv, xiv, and yiv each represent a number that satisfies
0<aiv≦2.0,

0≦biv≦1.0,

0<aiv+biv≦2.5,

0<civ≦2.0,

0<div≦2.0,

0≦eiv≦1.0,

0.5≦civ+div+eiv≦2.5,

0<xiv≦2.0,

0≦yiv≦1.0,

and
0.5≦xiv+yiv≦2.5.

10. The phosphor according to claim 9 , wherein
A 4 is one or more elements selected from the group consisting of Li, Na, K, Rb, and Cs,
B 4 is an element that mainly includes one or more selected from the group consisting of Ca, Sr, and Ba,
C 4 is an element that mainly includes Mg,
D 4 is one or more elements selected from the group consisting of Al, Ga, In, Sc, and Y, and
X 4 is one or more halogen elements that include at least F.

11. The phosphor according to claim 9 , wherein C 4 is Mg.

12. The phosphor according to claim 9 , wherein
E 4 is one or more elements selected from the group consisting of Ti, Zr, Hf, Si, Ge, and Sn, and
Y 4 includes at least O.

13. The phosphor according to claim 9 , wherein the phosphor comprises a crystal phase having a pyrochlore structure.

14. A phosphor-containing composition, comprising
the phosphor of claim 1 , and
a liquid medium.

15. A light-emitting unit, comprising
a first illuminant, and
a second illuminant that emits visible light upon exposure to light from the first illuminant,
wherein the second illuminant comprises a first phosphor that includes one or more of the phosphor of claim 1 .

16. The light-emitting unit according to claim 15 , wherein the second illuminant comprises a second phosphor that includes one or more phosphors having an emission peak wavelength different from the emission peak wavelength of the first phosphor.

17. A lighting device, comprising the light-emitting unit of claim 15 .

18. An image display device, comprising the light-emitting unit of claim 15 .

Assignees

• Mitsubishi Chem Corp

Inventors

• Hong Byungchul
• Oishi Atsushi

Classifications

• H10W90/756

  between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title

• H10W74/00

  Encapsulations, e.g. protective coatings · CPC title

• C09K11/646

  Silicates · CPC title

• C09K11/666 Primary

  Aluminates; Silicates · CPC title

• C09K11/64

  containing aluminium · CPC title