Semiconductor light emitting device
US-9437787-B2 · Sep 6, 2016 · US
Fluorescent Material and Light-Emitting Device
US2016333266A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016333266-A1 |
| Application number | US-201515112215-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 21, 2015 |
| Priority date | Jan 22, 2014 |
| Publication date | Nov 17, 2016 |
| Grant date | — |
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Abstract
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There is provided a fluorescent material having a composition represented by the following Formula (1). (Sr a , Ba b , Eu x , M 1 1 , M 2 e ) SiO f .cMgO . . . Formula (1) (In the formula, M 1 is at least one tertiary group element selected from Y and Tb; M 2 is an alkali metal selected from Li, Na, and K; and 0<a<2, 0<b<2, 0≦c<1, 0.001≦d≦0.06, 0≦e≦0.06, 0<x<0.1, and 3.7≦f≦4.1 are set.) Further, there is provided a light-emitting device including: the fluorescent material; and a light source irradiating the fluorescent material with excitation light to cause the fluorescent material to emit light.
First claim
Opening claim text (preview).
1 . A fluorescent material having a composition represented by the following Formula (1): (Sr a ,Ba b ,Eu x ,M 1 d ,M 2 e )SiO f .c MgO Formula (1), in the formula, M 1 being at least one tertiary group element selected from Y and Tb; M 2 being an alkali metal selected from Li, Na, and K; and 0<a<2, 0<b<2, 0≦c<1, 0.001≦d≦0.06, 0≦e≦0.06, 0<x<0.1, and 3.7≦f≦4.1 being set. 2 . The fluorescent material according to claim 1 , wherein a content of M 1 is 500 to 16000 ppm based on mass standard. 3 . The fluorescent material according to claim 1 , wherein x is 0.025≦x≦0.03. 4 . The fluorescent material according to claim 1 , wherein the fluorescent material has an external quantum efficiency of 66% or more when being excited by excitation light having a wavelength of 400 nm. 5 . The fluorescent material according to claim 2 , wherein the fluorescent material has an external quantum efficiency of 66% or more when being excited by excitation light to having a wavelength of 400 nm. 6 . The fluorescent material according to claim 3 , wherein the fluorescent material has an external quantum efficiency of 66% or more when being excited by excitation light having a wavelength of 400 nm. 7 . A light-emitting device comprising: the fluorescent material according to claim 1 ; and a light source irradiating the fluorescent material with excitation light to cause the fluorescent material to emit light.
Assignees
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Classifications
- C09K11/77922Primary
Silicates · CPC title
with alkaline earth metals · CPC title
containing beryllium, magnesium, alkali metals or alkaline earth metals · CPC title
Wavelength conversion materials · CPC title
Electricity · mapped topic
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- What does patent US2016333266A1 cover?
- There is provided a fluorescent material having a composition represented by the following Formula (1). (Sr a , Ba b , Eu x , M 1 1 , M 2 e ) SiO f .cMgO . . . Formula (1) (In the formula, M 1 is at least one tertiary group element selected from Y and Tb; M 2 is an alkali metal selected from Li, Na, and K; and 0<a<2, 0<b<2, 0≦c<1, 0.001≦d≦0.06, 0≦e≦0.06, 0<x<0.1, and 3.7≦f≦4.1 are set.) F…
- Who is the assignee on this patent?
- Ube Industries
- What technology area does this patent fall under?
- Primary CPC classification C09K11/77922. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Nov 17 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).