Fluorescent Fluoride, Light-Emitting Device, and Process for Producing Florescent Fluoride
US-2018282620-A1 · Oct 4, 2018 · US
Fluoride phosphor and light-emitting device using same
US11114589B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11114589-B2 |
| Application number | US-201816622783-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 12, 2018 |
| Priority date | Jun 14, 2017 |
| Publication date | Sep 7, 2021 |
| Grant date | Sep 7, 2021 |
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Abstract
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Provided is a fluoride phosphor that has a good external quantum efficiency and is suitable for stably producing white LEDs. The fluoride phosphor has a composition represented by a general formula (1) and a repose angle of 30° or more and 60° or less. general formula: A2M(1-n)F6:Mn4+n (1), wherein 0<n≤0.1, the element A is one or more alkali metal elements including at least K, and the element M is a simple substance of Si, a simple substance of Ge, or a combination of Si and one or more elements selected from the group consisting of Ge, Sn, Ti, Zr, and Hf.
First claim
Opening claim text (preview).
The invention claimed is: 1. A fluoride phosphor having a composition represented by a following general formula (1) and a repose angle of 30° or more and 60° or less: A 2 M (1-n) F 6 :Mn 4+ n formula (1) wherein 0<n≤0.1; an element A is one or more alkali metal elements containing at least K; and an element M is a simple substance of Si, a simple substance of Ge, or a combination of Si and one or more elements selected from the group consisting of Ge, Sn, Ti, Zr, and Hf; wherein a bulk density of the fluoride phosphor is 1.00 g/cm 3 or more and 1.40 g/cm 3 or less, and wherein a mass median diameter (D50) of the fluoride phosphor is 29 μm or less. 2. The fluoride phosphor according to claim 1 , wherein in the general formula (1), the element A is a simple substance of K and the element M is a simple substance of Si. 3. The fluoride phosphor according to claim 1 , wherein a span value is 1.5 or less, as calculated by the following formula (2) using a 10% diameter (D10), a mass median diameter (D50), and a 90% diameter (D90) obtained from a mass-based cumulative distribution curve: (span value)=( D 90 −D 10)/ D 50 formula (2) 4. A light emitting device comprising: the fluoride phosphor according to claim 1 ; and a light emitting source. 5. The light emitting device according to claim 4 , wherein a peak wavelength of the light emitting source is 420 nm or more and 480 nm or less. 6. The light emitting device according to claim 4 , wherein the light emitting device is a white LED device.
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Classifications
Wavelength conversion means · CPC title
Materials of the light-emitting regions · CPC title
- H10H20/8512Primary
Wavelength conversion materials · CPC title
Silicates · CPC title
- C09K11/616Primary
with alkali or alkaline earth metals · CPC title
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- What does patent US11114589B2 cover?
- Provided is a fluoride phosphor that has a good external quantum efficiency and is suitable for stably producing white LEDs. The fluoride phosphor has a composition represented by a general formula (1) and a repose angle of 30° or more and 60° or less. general formula: A2M(1-n)F6:Mn4+n (1), wherein 0<n≤0.1, the element A is one or more alkali metal elements including at least K, and the element…
- Who is the assignee on this patent?
- Denka Company Ltd
- What technology area does this patent fall under?
- Primary CPC classification H10H20/8512. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 07 2021 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).