Hollow-structure strontium terbium aluminate luminescent material and preparation method thereof

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

Active Publication Date: 2014-10-29
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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  • Hollow-structure strontium terbium aluminate luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of Hollow Structure Sr Coated Metal Nanoparticles 0.9 Al 2 O 4 :Tb 0.1 Cu 1×10 -4:

[0031] Preparation of Cu nanoparticle sol: Weigh 1.6 mg of copper nitrate and dissolve it in 16 mL of ethanol. After it is completely dissolved, add 2 mg of PVP while stirring, and then slowly dropwise add 1 × 0.4 mg of sodium borohydride dissolved in 10 mL of ethanol. 10 -3 4 mL of mol / L sodium borohydride alcoholic solution, continue to stir for 10 min to obtain 20 mL of 4×10 -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 an alcohol solution of sucrose, add 0.5mL of the above sol to the alcohol solution of sucrose to obtain a mixed solution, and then transfer the mixed solution into 50mL of polyamide In a reaction kettle lined with tetrafluoroethylene, after the lid was tightened, the reaction was carried out at 200 °C for 5 h to prepare a solution containing CCu. The solut...

Embodiment 2

[0036] Preparation of Hollow Structure 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 into 10 mL of deionized water; when the chloroauric acid is completely dissolved, weigh 14 mg of sodium citrate and 6 mg of cetyltrimethylammonium bromide, and dissolve them into an aqueous solution of chloroauric acid under magnetic stirring 3.8 mg of sodium borohydride and 17.6 mg of ascorbic acid were weighed and dissolved in 10 mL of deionized water to obtain 10 mL with a concentration of 1×10 -2 mol / L sodium borohydride aqueous solution and 10mL concentration of 1×10 -2 mol / L ascorbic acid aqueous solution; under the environment of magnetic stirring, first add 5 mL sodium borohydride aqueous solution to the chloroauric acid aqueous solution, stir for 5 min, and then add 5 mL 1 × 10 chloroauric acid aqueous solution to the aqueous solution. -2 mol / L of asco...

Embodiment 3

[0042] Preparation of Hollow Structure Sr Coated Metal Nanoparticles 0.98 Al 2 O 4 :Tb 0.02 Ag 2.5×10 -4:

[0043] Preparation of Ag nanoparticle sol: Weigh 3.4 mg of silver nitrate (AgNO 3 ) was dissolved in 18.4 mL of deionized water; when the silver nitrate was completely dissolved, 42 mg of sodium citrate was weighed and dissolved in an aqueous silver nitrate solution under magnetic stirring; 5.7 mg of sodium borohydride was weighed and dissolved in 10 mL of deionized water, Get 10mL with a concentration of 1.5×10 -2 mol / L sodium borohydride aqueous solution; under the environment of magnetic stirring, add 1.6mL 1.5×10 to the silver nitrate aqueous solution at one time -2 mol / L sodium borohydride aqueous solution, then continue to react for 10min, that is, 20mL Ag content is 1 × 10 -3 mol / L of 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 th...

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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 (light emitting diodes) have the advantages of high efficiency, long life, small size, fast response, no pollution, energy saving, etc., and have received more and more attention. One of the main ways to achieve white light is to combine blue GaN chips with yellow YAG:Ce phosphors to generate white light. The disadvantage of this method is the low color rendering index. The combination 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 efficiently excited by violet and n...

Claims

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Application Information

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Patent Type & Authority Applications(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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