Light emitting device having surface-modified quantum dot luminophores
US-9196785-B2 · Nov 24, 2015 · US
Method of manufacturing surface-treated phosphor, surface-treated phosphor, wavelength conversion member, and light emission device
US2017145306A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017145306-A1 |
| Application number | US-201515319084-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 18, 2015 |
| Priority date | Jun 18, 2014 |
| Publication date | May 25, 2017 |
| Grant date | — |
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Abstract
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A method of manufacturing a surface-treated phosphor ( 11 ) in which the surface of an alkaline-earth silicate phosphor ( 12 ) containing a silicate of alkaline-earth metal is covered with a surface treatment layer ( 13 ), the method comprising: surface treatment which brings the alkaline-earth silicate phosphor ( 12 ) into contact with the surface treatment substance ( 23 ) molten or pyrolyzed to form the surface treatment layer ( 13 ) on the surface of the alkaline-earth silicate phosphor ( 12 ) wherein the surface treatment substance ( 23 ) is at least one selected from a group consisting of a sulfate, a phosphate, a carbonate, a borate, a boric acid, a titanate, and a fluoride.
First claim
Opening claim text (preview).
1 . A method of manufacturing a surface-treated phosphor in which the surface of an alkaline-earth silicate phosphor containing a silicate of alkaline-earth metal is covered with a surface treatment layer, the method comprising: surface treatment which brings the alkaline-earth silicate phosphor into contact with the surface treatment substance molten or pyrolyzed to form the surface treatment layer on the surface of the alkaline-earth silicate phosphor wherein the surface treatment substance is at least one selected from a group consisting of a sulfate, a phosphate, a carbonate, a borate, a boric acid, a titanate, and a fluoride. 2 . The method of manufacturing a surface-treated phosphor according to claim 1 , wherein the surface treatment includes: mixing the alkaline-earth silicate phosphor with the surface treatment substance in a solid state; and heating a mixture obtained by the mixing to melt or pyrolyze the surface treatment substance. 3 . The method of manufacturing a surface-treated phosphor according to claim 1 , wherein the surface treatment layer has a thickness of not less than 5 nm and not more than 1000 nm. 4 . The method of manufacturing a surface-treated phosphor according to claim 1 , wherein the silicate of the alkaline-earth metal is a silicate of at least a kind of alkaline-earth metal selected from strontium, barium, and calcium. 5 . A surface-treated phosphor manufactured by using the method of manufacturing a surface-treated phosphor according to claim 1 . 6 . A wavelength conversion member, comprising: a translucent medium; and the surface-treated phosphor according to claim 5 dispersed in the translucent medium, wherein the translucent medium has a refractive index smaller than the surface treatment layer. 7 . A light emission device, comprising: an excitation source; and the surface-treated phosphor according to claim 5 which converts a part of light radiated from the excitation source to light of longer wavelength and radiates the light of longer wavelength. 8 . A light emission device, comprising: an excitation source; and the wavelength conversion member according to claim 6 which converts a part of light radiated from the excitation source to light of longer wavelength and radiates the light of longer wavelength.
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Classifications
Encapsulations, e.g. protective coatings · CPC title
- C09K11/77342Primary
Silicates · CPC title
- C09K11/025Primary
non-luminescent particle coatings or suspension media · CPC title
Electricity · mapped topic
- C09K11/7706Primary
Aluminates · CPC title
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- What does patent US2017145306A1 cover?
- A method of manufacturing a surface-treated phosphor ( 11 ) in which the surface of an alkaline-earth silicate phosphor ( 12 ) containing a silicate of alkaline-earth metal is covered with a surface treatment layer ( 13 ), the method comprising: surface treatment which brings the alkaline-earth silicate phosphor ( 12 ) into contact with the surface treatment substance ( 23 ) molten or …
- Who is the assignee on this patent?
- Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C09K11/77342. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu May 25 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).