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Title:
SINGLE-MATRIX DOUBLE-EMISSION FLUORESCENT POWDER, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/233116
Kind Code:
A1
Abstract:
Disclosed in the present invention are a single-matrix double-emission fluorescent powder, and a preparation method therefor and the use thereof, which belong to the technical field of light-emitting materials. The single-matrix double-emission fluorescent powder has a chemical formula of Cs2Sn1-x-yBixSbyCl6, wherein 0.005≤x≤0.09, and 0.05≤y≤0.25 are satisfied. The fluorescent powder has a very broad excitation spectrum, can effectively absorb light in the range of 300-400nm, can effectively absorb near-ultraviolet light emitted by an ultraviolet LED chip, and is doped with trivalent ions of Bi3+ and Sb3+. The emission spectra are respectively located at 400-525nm (Bi3+) and 550-850nm (Sb3+), both of which are in line with the absorption spectrum required by plants. By adjusting the contents of the trivalent ions of Bi3+ and Sb3+, a stable and adjustable light color can be achieved, and pink light required for plant growth is obtained, and the fluorescent powder is a single-matrix material; and compared with the preparation of a plant lighting LED by mixing multi-color fluorescent powders, the problems of reabsorption, unstable light color, different aging rates, complicated adjustment of the ratio of different fluorescent powders etc. can be effectively avoided, and the preparation process has a simple method, is easy to realize, is low cost, has low toxicity, and can be applied to large-scale industrialization.

Inventors:
WANG JING (CN)
GAN WEIJIANG (CN)
LOU SUNQI (CN)
CAO LUYU (CN)
Application Number:
PCT/CN2021/128249
Publication Date:
November 10, 2022
Filing Date:
November 02, 2021
Export Citation:
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Assignee:
UNIV SUN YAT SEN (CN)
International Classes:
C09K11/66; A01G7/04; F21V9/30
Foreign References:
CN113355092A2021-09-07
CN107017325A2017-08-04
CN111500288A2020-08-07
Other References:
LI JINGHUI; TAN ZHIFANG; HU MANCHEN; CHEN CHAO; LUO JIAJUN; LI SHUNRAN; GAO LIANG; XIAO ZEWEN; NIU GUANGDA; TANG JIANG: "Antimony doped CsSnClwith bright and stable emission", FRONTIERS OF OPTOELECTRONICS, HIGHER EDUCATION PRESS, HEIDELBERG, vol. 12, no. 4, 16 May 2019 (2019-05-16), Heidelberg , pages 352 - 364, XP036979402, ISSN: 2095-2759, DOI: 10.1007/s12200-019-0907-4
ZHIFANG TAN, JINGHUI LI, CHENG ZHANG, ZHA LI, QINGSONG HU, ZEWEN XIAO, TOSHIO KAMIYA, HIDEO HOSONO, GUANGDA NIU, EFRAT LIFSHITZ, Y: "Highly Efficient Blue-Emitting Bi-Doped Cs 2 SnCl 6 Perovskite Variant: Photoluminescence Induced by Impurity Doping", ADVANCED FUNCTIONAL MATERIALS, WILEY - V C H VERLAG GMBH & CO. KGAA, DE, vol. 28, no. 29, 1 July 2018 (2018-07-01), DE , pages 1801131, XP055700186, ISSN: 1616-301X, DOI: 10.1002/adfm.201801131
Attorney, Agent or Firm:
YOGO PATENT AND TRADEMARK AGENCY LIMITED COMPANY (CN)
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