发明名称 |
Phosphor, method for producing same, and use of same |
摘要 |
Provided are: a phosphor that has a crystal structure identical to a CaAlSiN3 crystal phase, which absorbs light of a light emitting element such as an LED and emits red light, as a host crystal and exhibits luminous efficiency more excellent than those of conventional phosphors; and a light emitting device which has high luminance and long service life by the use of this phosphor. A powder phosphor, which is represented by general formula Cax(Si,Al)2(N,O)3+y (wherein 0.75≦x≦0.92 and −0.2≦y≦0.2), and wherein some of Ca element is substituted by Eu element. This powder phosphor has an Si/Al ratio (molar ratio) of from 0.9 to 1.55 (inclusive), an Eu content of from 0.01 at % to 0.3 at % (inclusive), and an amount of intragranular solid-solved oxygen of from 0.4% by mass to 0.7% by mass (inclusive). |
申请公布号 |
US9309460(B2) |
申请公布日期 |
2016.04.12 |
申请号 |
US201214374815 |
申请日期 |
2012.11.02 |
申请人 |
DENKA COMPANY LIMITED |
发明人 |
Emoto Hideyuki;Toyoshima Hiroaki |
分类号 |
C09K11/64;H01L33/50;C09K11/77;C09K11/08;F21K99/00 |
主分类号 |
C09K11/64 |
代理机构 |
Stein IP, LLC |
代理人 |
Stein IP, LLC |
主权项 |
1. A powder phosphor represented by a general formula Cax(Si,Al)2(N,O)3+y, wherein 0.75≦x≦0.92 and −0.2≦y≦0.2, with some of Ca elements substituted with Eu elements, wherein the powder phosphor has a Si/AI ratio (molar ratio) of 0.9 or more and 1.55 or less, an Eu content of 0.01 at % or more and 0.3 at % or less, and an amount of solid solution oxygen in particle of 0.4 mass % or more and 0.7 mass % or less. |
地址 |
Tokyo JP |