Hydrophobized Phosphor and Light-Emitting Device
US-2017176647-A1 · Jun 22, 2017 · US
Phosphor and light-emitting device
US2018086973A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018086973-A1 |
| Application number | US-201615544679-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 19, 2016 |
| Priority date | Jan 20, 2015 |
| Publication date | Mar 29, 2018 |
| Grant date | — |
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- Title
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Abstract
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Provided is a phosphor that emits red light, is represented by the general formula, A 2 MF 6 :Mn, and exhibits little reduction in intensity even when exposed to a high-temperature, high-humidity atmosphere over a long period of time. Also provided is a light-emitting device using said phosphor. The present invention is a phosphor in which the main crystal phase thereof is represented by the general formula, A 2 MF 6 :Mn. The element A is an alkali metal element including at least K, and the element M is one or more tetravalent elements selected from the group consisting of Si, Ge, Sn, Ti, Zr, and Hf. The phosphor has a coating layer on the surface thereof. The coating layer is a hydrophobic organic substance having a hydrophobicity of 10% or more.
First claim
Opening claim text (preview).
1 . A phosphor comprising a main crystal phase represented by the general formula: A 2 MF 6 :Mn in which the elements A each represents at least one alkali metal element including at least K, and the element M represents one or more tetravalent elements selected from the group consisting of Si, Ge, Sn, Ti, Zr and Hf, the phosphor having a coating layer on a surface of the phosphor, the coating layer comprising an organic substance having a degree of hydrophobicity of 10% or more. 2 . The phosphor according to claim 1 , wherein the organic substance is a fatty acid. 3 . The phosphor according to claim 2 , wherein the fatty acid is a long chain fatty acid. 4 . A light emitting device comprising the phosphor according to claim 1 and a light emitting element. 5 . The light emitting device according to claim 4 , wherein the organic substance is a fatty acid. 6 . The light emitting device according to claim 5 , wherein the fatty acid is a long chain fatty acid.
Assignees
Inventors
Classifications
- C09K11/025Primary
non-luminescent particle coatings or suspension media · CPC title
Silicates · CPC title
with alkali or alkaline earth metals · CPC title
- C09K11/02Primary
Use of particular materials as binders, particle coatings or suspension media therefor · CPC title
with alkali or alkaline earth metals · CPC title
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- What does patent US2018086973A1 cover?
- Provided is a phosphor that emits red light, is represented by the general formula, A 2 MF 6 :Mn, and exhibits little reduction in intensity even when exposed to a high-temperature, high-humidity atmosphere over a long period of time. Also provided is a light-emitting device using said phosphor. The present invention is a phosphor in which the main crystal phase thereof is represented by the ge…
- Who is the assignee on this patent?
- Denka Company Ltd
- What technology area does this patent fall under?
- Primary CPC classification C09K11/025. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Mar 29 2018 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).