Title:
HIGH-PERFORMANCE, NARROW-BAND FLUORESCENT POWDER AND PREPARATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/098148
Kind Code:
A1
Abstract:
The present invention relates to a high-performance, narrow-band fluorescent powder, and a preparation method thereof. The preparation method comprises the following steps: S1: dissolving a hexafluoromanganic acid salt in an HF solution, and adding under agitation a silicon-containing chemical compound and a cesium-containing chemical compound, obtaining a mixed solution; S2: performing a coprecipitation reaction at -40 to -10ºC, obtaining a precipitate, then centrifugating, washing and drying, obtaining a crude Cs2SiF6:Mn4+ fluorescent powder product; S3: adding the crude Cs2SiF6:Mn4+ fluorescent powder product to an acid solution, adding a reducing solution under agitation conditions, then agitating, centrifugating, washing and drying, obtaining a high-performance, narrow-band fluorescent powder. The preparation method provided in the present invention is low-cost, simple, easily performed, has excellent performance, and is appropriate for large-scale industrial production; external quantum efficiency of the obtained high-efficiency, narrow-band fluorescent powder is high, and moisture-resistant functionality is good.
Inventors:
WANG JING (CN)
LIU YONG (CN)
HUANG LIN (CN)
LIU YONG (CN)
HUANG LIN (CN)
Application Number:
PCT/CN2019/071839
Publication Date:
May 22, 2020
Filing Date:
January 16, 2019
Export Citation:
Assignee:
UNIV SUN YAT SEN (CN)
International Classes:
H01L33/50; C09K11/61
Foreign References:
| CN105038776A | 2015-11-11 | |||
| CN105038774A | 2015-11-11 |
Other References:
SONG ET AL.: "Highly Efficient and Stable Narrow-Band Red Phosphor Cs2SiF6:Mn4+ for High- Power Warm White LED Applications", ACS PHOTONICS, 15 September 2017 (2017-09-15), pages 2556 - 2565, XP055707691, ISSN: 2330-4022
Attorney, Agent or Firm:
YOGO PATENT & TRADEMARK AGENCY LIMITED COMPANY et al. (CN)
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