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Lanthanum oxysulfide luminescent material and preparation method thereof

A luminescent material, lanthanum oxysulfide technology, applied in luminescent materials, chemical instruments and methods, etc., to achieve the effects of improving luminous efficiency, saving rare earth resources, and reducing product costs

Active Publication Date: 2016-11-30
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

The existing field emission luminescent materials prepared by wet method or solid phase method still need to be further improved in terms of morphology and luminous brightness.

Method used

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  • Lanthanum oxysulfide luminescent material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: La 1.89 o 2 S:Tb 0.1 3+ , Dy 0.01 3+ @Pd 1×10ˉ5 :

[0026] Preparation of Pd nanoparticle sol: Weigh 0.22 mg palladium chloride (PdCl 2 2H 2 O) Dissolved in 10mL of deionized water; when the palladium chloride was completely dissolved, weigh 11.0mg of sodium citrate and 4.0mg of sodium lauryl sulfate, and dissolve them in an aqueous solution of palladium chloride under a magnetic stirring environment; Weigh 0.38mg sodium borohydride and dissolve it in 100mL deionized water to obtain a concentration of 1×10 -4 mol / L sodium borohydride reducing solution; in the environment of magnetic stirring, quickly add 10mL1×10 -4 sodium borohydride aqueous solution, and then continue to react for 20min to obtain 20mL Pd content of 5×10 -5 mol / L Pd nanoparticle sol.

[0027] Preparation of C@Pd: Weigh 6.005g of glucose and dissolve it in 36mL of absolute ethanol to obtain an alcohol solution of glucose, add 4mL of the above sol to the alcohol solution of glucose ...

Embodiment 2

[0031] Example 2: La 1.78 o 2 S:Tb 0.2 3+ , Dy 0.02 3+ @Au 1×10ˉ2

[0032] 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 obtain 20mL Au content of 5×10 -3 ...

Embodiment 3

[0036] Example 3: La 1.991 o 2 S:Tb 0.001 3+ , Dy 0.008 3+ @Pt 5×10ˉ3 :

[0037] Containing the preparation of Pt nanoparticle sol: take by weighing 25.9mg chloroplatinic acid (H 2 PtCl 6 ·6H 2O) be dissolved in 17mL of deionized water; under the condition of magnetic stirring, 400mg sodium citrate and 600mg sodium dodecylsulfonate are dissolved in the above-mentioned chloroplatinic acid solution; 1.9mg sodium borohydride is weighed and dissolved in 10mL deionized water to obtain a concentration of 5 x 10 -3 mol / L sodium borohydride solution; at the same time prepare 10mL concentration of 5×10 -2 mol / L hydrazine hydrate solution; under the condition of magnetic stirring, first add 0.4mL of the above-mentioned sodium borohydride solution dropwise to the above-mentioned chloroplatinic acid solution, after reacting for 5min, then add 2.6mL of the above-mentioned hydrazine hydrate solution to the above-mentioned chloroplatinic acid solution Hydrazine solution, continue ...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a lanthanum oxysulfide luminescent material and a preparation method thereof; the general chemical formula of the luminescent material is La 2‑x‑n o 2 S:Tb x 3+ , Dy n 3+ @M z ; Among them, La 2‑x‑ n o 2 S:Tb x 3+ , Dy n 3+ is the shell, @ is the coating, M is the core; M is at least one of Ag, Au, Pt, Pd, Cu, 0<x≤0.2, 0<n≤0.02, z is M and La 2‑x‑n o 2 S:Tb x 3+ , Dy n 3+ Mole ratio, 0<z≤1×10 ‑2 . The lanthanum oxysulfide luminescent material provided by the present invention introduces M metal nanoparticles and enhances phosphor luminescence by doping the metal nanoparticles, so that the luminous efficiency of the lanthanum oxysulfide luminescent material is greatly improved under the same excitation conditions.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a lanthanum oxysulfide luminescent material and a preparation method thereof. Background technique [0002] In recent years, field emission devices have attracted much attention due to their advantages such as low operating voltage, low power consumption, no need for deflection coils, no X-ray radiation, and resistance to radiation and magnetic field interference. The combination of field emission cathodes and luminescent materials can obtain high brightness, high The color rendering field emission light source can be used in fields such as display, various indications, and general lighting. The working principle of this field emission device is similar to that of a traditional cathode ray tube (CRT). It uses electron beams to bombard red, green, and blue three-color phosphors to emit light for imaging or lighting purposes. , operating temperature range, energy consumption a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/84
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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