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Electroluminescent material and preparation method thereof

An electroluminescent and chemical technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of poor stability of sulfide system, uneven emission of electrons, and decrease in the number of emitted electrons, achieving good stability and high product quality , easy-to-control effects

Inactive Publication Date: 2012-05-30
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability of the sulfide system is poor, it is not resistant to bombardment, it is easy to decompose, and the produced H 2 S is easy to poison the cathode, resulting in uneven emission of electrons and a decrease in the number of emitted electrons, and even causes the device to fail to work.
The oxide series has high stability, but the luminous brightness is not as good as that of the sulfide series

Method used

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  • Electroluminescent material and preparation method thereof
  • Electroluminescent material and preparation method thereof
  • Electroluminescent material and preparation method thereof

Examples

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preparation example Construction

[0022] The preparation method of above-mentioned electroluminescent material, such as figure 1 As shown, the preparation process is as follows:

[0023] Step S1, at room temperature, according to the general chemical formula N 1-x R 2 o 4 : xLn, the stoichiometric ratio of each element in zM, measure the nitrate solution corresponding to N, R, Ln elements and inject in the beaker, add water and ethanol again, stir, make mixed solution; Wherein, N is Zn, Ca, One or both of Sr or Ba; R is one or both of Al and Ga; Ln is Tm 3+ , Tb 3+ 、Eu 3+ 、Sm 3+ 、Ce 3+ or Dy 3+ One or two of them; M is one or two of Ag, Au, Pt or Pd nanoparticles; 0.0001≤x≤0.2, 0-2 ;

[0024] Step S2, adding citric acid for chelation to the mixed solution in step S1, then adding polyethylene glycol for surface treatment, and stirring;

[0025] Step S3, according to the general chemical formula N 1-x R 2 o 4 : xLn, the stoichiometric ratio of each element in zM, add the surface-treated M nanopartic...

Embodiment 1

[0037] Embodiment 1: Sol-gel method prepares Zn 0.999 Al 2 o 4 :0.001Dy, 1×10 -3 Pt

[0038] Weigh 5.18mg chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) be dissolved in the deionized water of 17mL; After chloroplatinic acid dissolves completely, take by weighing 8.0mg sodium citrate and 12.0mg sodium dodecylsulfonate, and dissolve in the chloroplatinic acid aqueous solution under the environment of magnetic stirring ; Weigh 0.38mg sodium borohydride and dissolve it in 10mL deionized water to obtain 10mL concentration of 1×10 -3 mol / L sodium borohydride aqueous solution, while preparing 10mL concentration of 1×10 -2 mol / L hydrazine hydrate solution; in the environment of magnetic stirring, first drop 0.4mL sodium borohydride aqueous solution into the chloroplatinic acid aqueous solution, stir for 5min, and then add dropwise 2.6mL1×10 -2 mol / L hydrazine hydrate solution, and then continue to react for 40min to obtain 20mL Pt content of 5×10 -4 mol / L Pt nanoparticle sol; then ...

Embodiment 2

[0040] Embodiment 2: Sol-gel method prepares Ca 0.995 Ga 2 o 4 :0.005Sm, 2×10 -3 Au

[0041] Weigh 16.48mg of chloroauric acid (AuCl 3 ·HCl·4H 2 O) be dissolved in the deionized water of 8.4mL; After chloroauric acid is completely dissolved, take by weighing 14mg sodium citrate and 6mg cetyltrimethylammonium bromide, and dissolve into chloroauric acid under the environment of magnetic stirring aqueous solution; weigh 1.9mg of sodium borohydride and 17.6mg of ascorbic acid were dissolved in 10mL of deionized water to obtain 10mL concentration of 5 × 10 -3 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 0.04mL sodium borohydride aqueous solution to the chloroauric acid aqueous solution, stir and react for 5 minutes, then add 1.56mL1×10 -2 mol / L ascorbic acid aqueous solution, and then continue to react for 30min to obtain 10mL Au content of 4×10 -3 mol / L A...

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Abstract

The invention belongs to the field of luminescent materials, and discloses an electroluminescent material and a preparation method thereof. The electroluminescent material has a genera chemical formula of N1-xR2O4:xLn, zM, wherein N is one or two of Zn, Ca, Sr and Ba; R is one or two of Al and Ga; Ln is one or two of Tm<3+>, Tb<3+>, Eu<3+>, Sm<3+>, Ce<3+> and Dy<3+>; M is one or two of Ag, Au, Pt and Pd metal particles; and x is more than or equal to 0.0001 and less than or equal to 0.2, and z is more than 0 and less than or equal to 1*10<-2>. For the electroluminescent material provided by the invention, by means of introducing the metal particles and using a surface plasma resonance effect generated on metal surfaces, the luminous intensity can be increased by 60 percent; meanwhile, the preparation method is simple in operation, is easy and pollution-free, is easy to control, and facilitates industrial production.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to an aluminum (gallium) salt-based electroluminescence material excited by cathode rays and containing metal particles. The invention also relates to a preparation method of the electroluminescence material. Background technique [0002] Due to the advantages of low operating voltage, low power consumption, no deflection coil, no X-ray radiation, radiation resistance, magnetic field interference, wide operating temperature range and fast response speed, field emission devices have attracted much attention. There are two main types of luminescent materials used in devices: sulfide systems, such as blue powder ZnS:Ag, Cl, SrGa 2 S 4 : Ce, green powder SrGa 2 S 4 :Eu and Pink Z 2 o 2 S:Eu, and oxide systems, such as blue powder Z 2 SiO 5 : Ce, green powder ZnGa 2 o 4 : Mn, Z 2 SiO 5 : Tb, Z 3 al 5 o 12 :Tb and pink Z 2 o 3 :Eu. However, the stability of the sulfi...

Claims

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Application Information

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IPC IPC(8): C09K11/64C09K11/62
Inventor 周明杰刘军马文波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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