Luminescent material
US-9022591-B2 · May 5, 2015 · US
Phosphor, method for producing phosphor and light emitting device
US9512359B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9512359-B2 |
| Application number | US-201314344087-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 15, 2013 |
| Priority date | Mar 16, 2012 |
| Publication date | Dec 6, 2016 |
| Grant date | Dec 6, 2016 |
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Abstract
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The present invention provides a phosphor comprising a europium-activated sialon crystal having a basic composition represented by a formula: (Sr 1-x , Eu x ) α Si β Al γ O δ N ω (1) (wherein x is 0<x<1, α is 0<α≦4 and β, γ, δ and ω are numbers such that converted numerical values when α is 3 satisfy 9<β≦15, 1≦γ≦5, 0.5≦δ≦3 and 10≦ω≦30), wherein the phosphor is composed of particles having a sphericity of 0.65 or more and emits green light by being excited by ultraviolet light, violet light or blue light.
First claim
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The invention claimed is: 1. A phosphor comprising a europium-activated sialon crystal having a basic composition represented by the following formula: (Sr 1-x ,Eu x ) α Si β Al γ O δ N ω , wherein x is 0<x<1, α is 3, and β, γ, δ and ω satisfy 9<β≦15, 1≦γ≦5, 0.5≦δ≦3 and 10≦ω≦30, wherein the phosphor belongs to an orthorhombic system, has an emission peak wavelength of 500 nm or more and 540 nm or less, is composed of particles having a Wadell's sphericity of from 0.65…
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- C09K11/77348Primary
Chemistry & Metallurgy · mapped topic
- C09K11/0883Primary
Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US9512359B2 cover?
- The present invention provides a phosphor comprising a europium-activated sialon crystal having a basic composition represented by a formula: (Sr 1-x , Eu x ) α Si β Al γ O δ N ω (1) (wherein x is 0<x<1, α is 0<α≦4 and β, γ, δ and ω are numbers such that converted numerical values when α is 3 satisfy 9<β≦15, 1≦γ≦5, 0.5≦δ≦3 and 10≦ω≦30), wherein the phosphor is composed of particles having a sp…
- Who is the assignee on this patent?
- Toshiba Kk, Toshiba Materials Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C09K11/77348. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 06 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).