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Strontium terbium aluminate luminescent material with hollow structure and preparation method thereof

A technology of luminescent materials and alumina, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous efficiency and limited application of light sources, and achieve good luminous performance and improved luminous efficiency

Active Publication Date: 2016-04-27
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Strontium aluminate doped with terbium has very good chemical stability and thermal stability, and has potential application value in the field of luminescent materials, but its luminous efficiency is low, which limits its application in light sources

Method used

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  • Strontium terbium aluminate luminescent material with hollow structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Fabrication of hollow-structured Sr coated metal nanoparticles 0.9 al 2 o 4 :Tb 0.1 Cu 1×10 -4:

[0031] Preparation of Cu nanoparticle sol: Weigh 1.6mg of copper nitrate and dissolve it in 16mL of ethanol. After it is completely dissolved, add 2mg of PVP while stirring, and then slowly drop in 1×10 -3 mol / L sodium borohydride alcohol solution 4mL, continue stirring for 10min to obtain 20mL4×10 -4 mol / L Cu nanoparticle sol.

[0032] Preparation of CCu: Weigh 0.1426g of sucrose and dissolve it in 39.5mL of absolute ethanol to prepare the alcohol solution of sucrose, add 0.5mL of the above sol to the alcohol solution of sucrose to obtain a mixed solution, then transfer the mixed solution into 50mL In a tetrafluoroethylene-lined reaction kettle, cover and tighten, react at 200°C for 5 hours to prepare a solution containing CCu, centrifuge the solution to obtain a solid phase, wash twice with deionized water and absolute ethanol , and dry the solid phase at 75°C to o...

Embodiment 2

[0036] Fabrication of hollow-structured Sr coated metal nanoparticles 0.95 al 2 o 4 :Tb 0.05 Au 1×10 -2

[0037] Preparation of Au nanoparticle sol: Weigh 41.2 mg of chloroauric acid (AuCl 3 ·HCl·4H 2 O) Dissolve in 10mL of deionized water; when the chloroauric acid is completely dissolved, weigh 14mg of sodium citrate and 6mg of cetyltrimethylammonium bromide, and dissolve them into the chloroauric acid aqueous solution under magnetic stirring Medium; Weigh 3.8mg of sodium borohydride and 17.6mg of ascorbic acid and dissolve them in 10mL deionized water respectively to obtain 10mL concentration of 1×10 -2 mol / L sodium borohydride aqueous solution and 10mL concentration is 1×10 -2 mol / L ascorbic acid aqueous solution; in the environment of magnetic stirring, first add 5mL sodium borohydride aqueous solution to the chloroauric acid aqueous solution, stir and react for 5min, then add 5mL1×10 -2 mol / L ascorbic acid aqueous solution, and then continue to react for 30min to...

Embodiment 3

[0042] Fabrication of hollow-structured Sr coated metal nanoparticles 0.98 al 2 o 4 :Tb 0.02 Ag 2.5×10 -4:

[0043] Preparation of Ag nanoparticles sol: Weigh 3.4 mg of silver nitrate (AgNO 3 ) into 18.4mL of deionized water; when the silver nitrate is completely dissolved, weigh 42mg of sodium citrate and dissolve it in the silver nitrate aqueous solution under magnetic stirring; weigh 5.7mg of sodium borohydride and dissolve it in 10mL of deionized water, Obtain 10mL concentration as 1.5×10 -2 mol / L sodium borohydride aqueous solution; under the environment of magnetic stirring, add 1.6mL1.5×10 -2 mol / L sodium borohydride aqueous solution, and then continue to react for 10min to obtain 20mL of Ag content of 1×10 -3 mol / L Ag nanoparticle sol.

[0044] Preparation of CAg: Weigh 3.003g of glucose and dissolve it in 35mL of absolute ethanol to prepare an alcohol solution of glucose, add 5mL of the above sol to the alcohol solution of glucose to obtain a mixed solution, t...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a hollow-structure strontium terbium aluminate luminescent material and a preparation method thereof. The chemical general formula of the luminescent material is Sr1-xAl2O4:Tbx@My, wherein @ represents cladding, Sr1-xAl2O4:Tbx is an outer shell, and M is an inner core, M is at least one selected from Ag, Au, Pt, Pd and Cu metal nanoparticles, 0<x<=0. 1, and 0<y<=1*10<-2>. According to the provided hollow-structure strontium terbium aluminate luminescent material, because of introduction of the M metal nanoparticle, the luminescent efficiency of the Sr1-xAl2O4:Tbx luminescent material at a same excitation condition is greatly improved without changing the wavelength of an emission ray.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a strontium-terbium aluminate luminescent material with a hollow structure and a preparation method thereof. Background technique [0002] White light LEDs (1ight emitting diodes) have gained more and more attention due to their advantages of high efficiency, long life, small size, fast response, no pollution, and energy saving. One of the main ways to realize white light is to combine blue GaN chips with yellow YAG:Ce phosphors to produce white light. The disadvantage of this method is the low color rendering index. The use of near-ultraviolet LED chips and red, green, and blue phosphors to form white LEDs has high luminous efficiency, adjustable color temperature, and high color rendering index. It has been widely studied and has become the mainstream of current development. Therefore, LED trichromatic phosphors that can be effectively excited by violet light and near-ult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64C09K11/02
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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