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Bismuth ion doped fluorescent powder and preparation method and application thereof

A fluorescent powder and luminous intensity technology, applied in the direction of fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of restricting large-scale applications, low light transmittance of glass, etc., and achieve excellent thermal stability and chemical properties The effect of stability and simple synthesis process

Pending Publication Date: 2022-07-12
长沙市斑点照明有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to reports, some Bi 3+ Functionalized aluminum borate and germanium borate glasses can emit broadband near-infrared emission (800-1600nm), but the low light transmittance of the glass limits large-scale applications
Furthermore, in addition to BaBPO 5 : Bi 3+ Outside, Bi 3+ Near-Infrared Emission of Activated Phosphors Rarely Reported

Method used

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  • Bismuth ion doped fluorescent powder and preparation method and application thereof
  • Bismuth ion doped fluorescent powder and preparation method and application thereof
  • Bismuth ion doped fluorescent powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The present embodiment is prepared according to the following method and the chemical formula is Na 0.02 Zn 1.96-α Ba α GeO 4 :0.02Bi 3+ (α=0, 0.2, 0.4, 0.6, 0.8) phosphor.

[0043] Na 0.02 Zn 1.96-α Ba α GeO 4 :0.02Bi 3+ (α=0,0.2,0.4,0.6,0.8) Phosphor preparation process: using barium carbonate (99.9%), zinc oxide (99.9%), germanium oxide (99.9%), bismuth oxide (99.99%) as raw materials, carbonate Sodium (99.9%) was used as a charge compensation agent, and the raw materials were weighed according to the general chemical formula:

[0044] barium carbonate Zinc oxide germanium oxide Bismuth oxide Sodium carbonate α＝0 0.0000g 0.3049g 0.2000g 0.0089g 0.0020g α＝0.2 0.0754g 0.2738g 0.2000g 0.0089g 0.0020g α＝0.4 0.1509g 0.2426g 0.2000g 0.0089g 0.0020g α＝0.6 0.2263g 0.2115g 0.2000g 0.0089g 0.0020g α＝0.8 0.3017g 0.1804g 0.2000g 0.0089g 0.0020g

[0045] The raw materials were uniformly mixed according...

Embodiment 2

[0051] The present embodiment is prepared according to the following method and the chemical formula is Na 0.02 Zn 1.36 Ba 0.6 Ge 1-β-γ Si β Sn γ O 4 :0.02Bi 3+ (β=0~0.6; γ=0~0.4) phosphor.

[0052] Na 0.02 Zn 1.36 Ba 0.6 Ge 1-β-γ Si β Sn γ O 4 :0.02Bi 3+ (β=0~0.6; γ=0~0.4) Phosphor preparation process: using barium carbonate (99.9%), zinc oxide (99.9%), germanium oxide (99.9%), silicon oxide (99.9%), tin oxide ( 99.9%), bismuth oxide (99.99%) as raw material, sodium carbonate (99.9%) as charge compensation agent, take by weighing the raw materials according to the general chemical formula:

[0053]

[0054] The raw materials were uniformly mixed according to the ratio of ball:material:absolute ethanol=4:2:1 to obtain a mixture precursor, which was put into a corundum crucible, and pre-sintered at a low temperature and normal pressure of 600 ° C for 5 hours. Sintering at 1400°C for 6h in a hydrogen-nitrogen mixture or a hydrogen-argon mixture, cooling to roo...

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Abstract

The invention discloses bismuth ion doped fluorescent powder and a preparation method thereof. The chemical formula of the fluorescent powder is (Li / Na / K) xZn < 2-2x-alpha > (Ba / Ca / Sr) alpha Ge < 1-beta-gamma > Si < beta > Sn < gamma > O < 4 >: xBi < 3 + >. Wherein x, alpha, beta and gamma are mole numbers of Bi < 3 + >, Ba < 2 + > / Ca < 2 + > / Sr < 2 + > substituted Zn < 2 + > and Si < 4 + > and Sn < 4 + > substituted Ge < 4 + > respectively, x is more than or equal to 0.002 and less than or equal to 0.04, alpha is more than or equal to 0 and less than or equal to 0.8, beta is more than or equal to 0 and less than or equal to 0.6, and gamma is more than or equal The fluorescent powder provided by the invention can well absorb ultraviolet light (260-360 nm), and can be well matched with a near ultraviolet semiconductor LED chip; the emission peak position can be subjected to red shift from 446 nm to 750 nm; the half peak width is 118 nm; excellent stability can be kept at the working temperature of 150 DEG C; and spectrum regulation and control can be realized by controlling the proportion of Ge / Si / Sn elements. The fluorescent powder has potential application prospects in the fields of biosensing, food component analysis, medical measurement and the like.

Description

technical field [0001] The invention relates to the technical field of luminescent materials and their preparation, in particular to an ultraviolet-excited single-matrix red-shifted phosphor and a preparation method and application thereof. Background technique [0002] With the rapid development of science and technology today, human health has become the most concerned issue. Near-infrared (NIR) light has been widely used in biosensing, food composition analysis, and medical measurement due to its low damage and high penetration. Traditional near-infrared light sources come from tungsten halogen lamps, laser diodes, and supercontinuum lasers. However, its unstable luminescence, high power consumption, and short service life limit its application in future optoelectronic devices. NIR-LEDs have the characteristics of high efficiency, low energy consumption, environmental protection, and long life, and are a feasible strategy to meet the needs of life and health analysis. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66G01N21/64C01B33/20
CPCC09K11/745G01N21/64C01B33/20C01P2006/60C01P2002/72C01P2004/03C01P2004/62Y02B20/00
Inventor 夏茂李亚男周智尹剑刘玉艳邓湘谭江
Owner 长沙市斑点照明有限公司
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