Title:
SULFIDE GREEN FLUORESCENT POWDER AND PREPARATION METHOD THEREFOR, AND LUMINESCENT APPARATUS USING FLUORESCENT POWDER
Document Type and Number:
WIPO Patent Application WO/2020/042158
Kind Code:
A1
Abstract:
A sulfide green fluorescent powder, having the following chemical formula: (Ca1-x-y,Srx,Bay)MdSaSen:zEu, cEr, bR, wherein M is one or more of Mg, Zn, Al, Ga, Gd, La, and Y, and R is one of Ce, Tb, Pr, Bi, Sb, Pb, Sn, and Ge. The sulfide green fluorescent powder has uniformly distributed particles and good stability after being encapsulated, can absorb the blue light emitted by an luminescent element, emits green light, does not absorb the red light emitted by a red luminescent body, and does not cause repeated absorption. Also disclosed is a luminescent apparatus comprising the sulfide green fluorescent powder, having a high luminous efficacy, a gamut level of 102, and a color rendering index of more than 97.
Inventors:
WANG JING (CN)
HU CHENG (CN)
YIN XIANGNAN (CN)
XU DA (CN)
HU CHENG (CN)
YIN XIANGNAN (CN)
XU DA (CN)
Application Number:
PCT/CN2018/103590
Publication Date:
March 05, 2020
Filing Date:
August 31, 2018
Export Citation:
Assignee:
DONGTAI TIANYUAN OPTOELECTRONIC TECH CO LTD (CN)
International Classes:
C09K11/56; C09K11/62; C09K11/77; H01L33/50
Foreign References:
| CN106753325A | 2017-05-31 |
Other References:
TAGIEV, B.C. ET AL.: "Luminescence of Ca0.5Ba0.5Ga2S4 Crystals Activated by Eu2+ and Er3+ Ions", OPTICS AND SPECTROSCOPY, vol. 118, no. 3, 24 March 2015 (2015-03-24), pages 410 - 413, XP055697465
DO, Y.R. ET AL.: "Luminescence Properties of Potential Srl-xCaxGa2S4:Eu Green- and Greenish-Yellow-Emitting Phosphors for White LED", JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 153, no. 7, 17 May 2006 (2006-05-17), XP055010032, DOI: 10.1149/1.2200299
ZHOU, WENLI ET AL.: "Sr1-xZnxY2S4:Er3+, Eu2+ (Preparation and Luminescence Properties of Srl-xZnxY2S4:Er3+, Eu2+ Phosphors", JOURNAL OF THE CHINESE SOCIETY OF RARE EARTHS, vol. 27, no. 1, 28 February 2009 (2009-02-28)
DO, Y.R. ET AL.: "Luminescence Properties of Potential Srl-xCaxGa2S4:Eu Green- and Greenish-Yellow-Emitting Phosphors for White LED", JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 153, no. 7, 17 May 2006 (2006-05-17), XP055010032, DOI: 10.1149/1.2200299
ZHOU, WENLI ET AL.: "Sr1-xZnxY2S4:Er3+, Eu2+ (Preparation and Luminescence Properties of Srl-xZnxY2S4:Er3+, Eu2+ Phosphors", JOURNAL OF THE CHINESE SOCIETY OF RARE EARTHS, vol. 27, no. 1, 28 February 2009 (2009-02-28)
Attorney, Agent or Firm:
NANJING TIANHUA PATENT AGENT CO., LTD. (CN)
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