Blue luminescent materials and preparation method thereof

Abstract

The invention belongs to the field of luminescent materials, and discloses a blue luminescent materials and a preparation method thereof. The chemical general formula of the luminescent material is Sr2CeO4:Mx, wherein M is a metal-doped nanoparticle and is at least one of Ag, Au, Pt, Pd and Cu, x is the molar ratio of M to Sr2CeO4, and 0<x<=1*10<-2>. According to the provided blue luminescent material, because of introduction of the M metal nanoparticle, doping of the metal nanoparticle helps to enhance luminescence of fluorescent powder, and enables the luminescent efficiency of the Sr2CeO4 blue luminescent material at a same excitation condition to be 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 blue luminescent material and a preparation method thereof. Background technique

[0002] In recent years, flat panel display has been paid more and more attention by people. The red powder and green powder in the flat panel full-color display have been respectively made by Eu 3+ and Tb 3+ The compounds were obtained, and achieved very satisfactory commercial results. However, the lack of blue phosphors has been hindering the development of full-color display, so it has been the direction of scientists' efforts to find high-efficiency, high-stability, high-color-purity blue light-emitting host materials.

[0003] Oxide-based luminescent powders have good stability and luminescence, and have great application potential in flat panel displays. Sr 2 CeO 4 It is a good blue luminescent powder, the color coordinates are x=0.198, y=0.292, and the emission peak is at 485nm. ...

Examples

Embodiment 1

[0027] Preparation of Sr by sol-gel method 2 CeO 4 :Pd 1×10-5 :

[0028] 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.

[0029] Weigh 1.6453g Sr(CH 3 COO) 2 and 1.2690g Ce(CH 3 COO) 3 Put it in a container, then add 50mL of a mixed solution of ethanol and water with a volume ratio of 4:1, add 1.4409g of citric acid and 10...

Embodiment 2

[0032] Preparation of Sr by sol-gel method 2 CeO 4 :Au 1×10-2 :

[0033] 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 mol / L ...

Embodiment 3

[0037] Preparation of Sr by sol-gel method 2 CeO 4 :Ag 2.5×10-4 :

[0038] Preparation of Ag nanoparticles sol: weigh 3.4 mg 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 Ag content of 1×10 -3 mol / L of Ag nanoparticles sol.

[0039] Weigh 1.6930g Sr(NO 3 ) 2 and 1.4485g Ce(NO 3 ) 3 Put it in a container, then add 50mL of a mixed solution of ethanol and water with a volume ratio of 8:1, add 1.4408g of citric acid and 5g of polyethylene glycol 10000 under the condition of stirring in a water...

technical field

[0001] The invention relates to the field of luminescent materials, in particular to a blue luminescent material and a preparation method thereof. Background technique

[0002] In recent years, flat panel display has been paid more and more attention by people. The red powder and green powder in the flat panel full-color display have been respectively made by Eu 3+ and Tb 3+ The compounds were obtained, and achieved very satisfactory commercial results. However, the lack of blue phosphors has been hindering the development of full-color display, so it has been the direction of scientists' efforts to find high-efficiency, high-stability, high-color-purity blue light-emitting host materials.

[0003] Oxide-based luminescent powders have good stability and luminescence, and have great application potential in flat panel displays. Sr 2 CeO 4 It is a good blue luminescent powder, the color coordinates are x=0.198, y=0.292, and the emission peak is at 485nm. ...

Examples

Embodiment 1

[0027] Preparation of Sr by sol-gel method 2 CeO 4 :Pd 1×10-5 :

[0028] 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.

[0029] Weigh 1.6453g Sr(CH 3 COO) 2 and 1.2690g Ce(CH 3 COO) 3 Put it in a container, then add 50mL of a mixed solution of ethanol and water with a volume ratio of 4:1, add 1.4409g of citric acid and 10...

Embodiment 2

[0032] Preparation of Sr by sol-gel method 2 CeO 4 :Au 1×10-2 :

[0033] 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 mol / L ...

Embodiment 3

[0037] Preparation of Sr by sol-gel method 2 CeO 4 :Ag 2.5×10-4 :

[0038] Preparation of Ag nanoparticles sol: weigh 3.4 mg 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 Ag content of 1×10 -3 mol / L of Ag nanoparticles sol.

[0039] Weigh 1.6930g Sr(NO 3 ) 2 and 1.4485g Ce(NO 3 ) 3 Put it in a container, then add 50mL of a mixed solution of ethanol and water with a volume ratio of 8:1, add 1.4408g of citric acid and 5g of polyethylene glycol 10000 under the condition of stirring in a water...

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