Bluish green phosphor and light emitting device package including the same

Patent metadata

Field	Value
Publication number	US-9837584-B2
Application number	US-201414417483-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Nov 13, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

Embodiments of the present invention provide a bluish green phosphor represented by Formula 1 below. In particular, the bluish green phosphor and a light emitting device package including the same may have improved luminescence characteristics and properties due to influence of cations and anions included in a composition formula:

A a B b O c N d G e D f E g :RE h   [Formula 1]
wherein A is at least one selected from the group consisting of Be, Mg, Ca, Sr, Ba and Ra elements, B is at least one selected from the group consisting of Si, Ge and Sn elements, G is any one of C, Cl, F and Br elements, D is one element or a mixture type of two or more elements selected from Li, Na and K, E is at least one selected from the group consisting of P, As, Bi, Sc, Y and Lu, RE is at least one selected from the group consisting of Eu, Ce, Sm, Er, Yb, Dy, Gd, Tm, Lu, Pr, Nd, Pm and Ho, 0<a≦15, 0<b≦15, 0<c≦15, 0<d≦20, 0<e≦10, 0<f≦6, 0<g≦6, and 0<h≦10.

First claim

The invention claimed is:

1. A bluish green phosphor represented by Formula 3 below:
Ba x Mg y Si b O c N d F e K w P z Li v :Eu h   [Formula 3]

wherein 0.5<x≦15, 0<y≦10, 0.5<x+y≦15, 5≦b≦15, 2≦c≦7, 5≦d≦20, 0<e≦1, 0<h≦1, 0<w≦6, 0<v≦6 and 0<z≦2.

2. The bluish green phosphor according to claim 1 , wherein the bluish green phosphor uses a wavelength area of 300 to 500 nm as an excitation source and has a luminescence wavelength of 460 to 540 nm.

3. The bluish green phosphor according to claim 2 , wherein a central wavelength of the luminescence wavelength is 490 nm to 500 nm.

4. The bluish green phosphor according to claim 1 , wherein the bluish green phosphor particle has a D10 size distribution of 1 μm or more and less than 10 μm at D10, a D50 size distribution of 10 μm or more and less than 30 μm, and a D90 size distribution of 20 μm or more and less than 70 μm.

5. The bluish green phosphor according to claim 1 , wherein v satisfies 0<v≦1.4.

6. A light emitting device package comprising:
at least one light emitting device emits light of an ultraviolet wavelength area or a blue light wavelength area; and
a molding part disposed on the at least one light emitting device and comprising a phosphor composition,
wherein the phosphor composition comprises the bluish green phosphor according to claim 1 .

Assignees

• Lg Innotek Co Ltd

Inventors

• Yoo Jae Soo
• Kim Jin Sung
• Yoo Jong Woo
• Yoo Ju A
• Lee Seong Wook

Classifications

• C09K11/7739

  with halogens · CPC title

• C09K11/7791

  with alkali or alkaline earth metals · CPC title

• C09K11/655

  Aluminates; Silicates · CPC title

• C09K11/7774

  Aluminates · CPC title

• C09K11/7733

  with alkali or alkaline earth metals · CPC title