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Er<3+>/Yb<3+>codoped mayenite upconversion fluorescent powder and preparation method thereof

A technology of dodecacalcium and phosphor powder, applied in the field of materials, can solve problems such as insufficient stability, and achieve the effects of easy mass production, pollution-free preparation method and low price

Active Publication Date: 2010-10-06
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxide (dodecalcium heptaaluminate) as the substrate overcomes the shortcomings of insufficient stability of current up-conversion materials based on fluoride and phosphate

Method used

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  • Er&lt;3+&gt;/Yb&lt;3+&gt;codoped mayenite upconversion fluorescent powder and preparation method thereof
  • Er&lt;3+&gt;/Yb&lt;3+&gt;codoped mayenite upconversion fluorescent powder and preparation method thereof
  • Er&lt;3+&gt;/Yb&lt;3+&gt;codoped mayenite upconversion fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] (1). Weighing 11.3629g of purity is 99.99% Al (NO 3 ) 3 9H 2 O, 6.1311g purity is 99.99% Ca (NO 3 ) 2 4H 2 O, 0.0093g of Er with a purity of 99.99% 2 o 3 , 0.2046g of Yb with a purity of 99.99% 2 o 3 Dissolve in deionized water, add 2ml of nitric acid dropwise, heat to 50°C and stir for 5 hours;

[0021] (2). Add dropwise 35ml of precipitant NH to the above solution 3 ·H 2 O, to obtain the gel precursor;

[0022] (3). Dry the obtained gel precursor at a temperature of 80°C to remove water;

[0023] (4). Put the dried gel in a high-temperature furnace, sinter at 1100°C for 6 hours in an air atmosphere, cool, and grind to obtain upconversion luminescence Er excited at 980nm 3+ / Yb 3+ Co-doped heptaaluminate dodecacalcium phosphor (12CaO 7Al 2 o 3 :Er 3+ 0.1% mol, Yb 3+ 0.5% mol).

example 2

[0025] (1). Weighing 18.9370g of purity is 99.99% Al (NO 3 ) 3 9H 2 O, 10.1159g purity is 99.99% Ca (NO 3 ) 2 4H 2 O, 0.0087g of Er with a purity of 99.99% 2 o 3 , 0.7673g of Yb with a purity of 99.99% 2 o 3 Dissolve in deionized water, add 4ml of nitric acid dropwise, heat to 30°C and stir for 8 hours;

[0026] (2). Add dropwise 60ml of precipitating agent NH to the above solution 3 ·H 2 O, to obtain the gel precursor;

[0027] (3). Dry the obtained gel precursor at a temperature of 100°C to remove water;

[0028] (4). Put the dried gel in a high-temperature furnace, sinter at 1090°C for 8 hours in an air atmosphere, cool, and grind to obtain upconversion luminescence Er excited at 980nm 3+ / Yb 3+ Co-doped heptaaluminate dodecacalcium phosphor (12CaO 7Al 2 o 3 :Er 3+ 0.1% mol, Yb 3+ 1.0% mol).

example 3

[0030] (1). Weighing 11.3622g of purity is 99.99% Al (NO 3 ) 3 9H 2 O, 5.8243g purity is 99.99% Ca (NO 3 ) 2 4H2 O, 0.0093g of Er with a purity of 99.99% 2 o 3 , 0.2506g of Yb with a purity of 99.99% 2 o 3 Dissolve in deionized water, add 10ml of nitric acid dropwise, heat to 70°C and stir for 2 hours;

[0031] (2). Add dropwise 110ml of precipitant NH to the above solution 3 ·H 2 O, to obtain the gel precursor;

[0032] (3). Dry the obtained gel precursor at a temperature of 90°C to remove water;

[0033] (4). Put the dried gel in a high-temperature furnace, sinter at 1180°C for 5 hours in an air atmosphere, cool, and grind to obtain upconversion luminescence Er excited at 980nm 3+ / Yb 3+ Co-doped heptaaluminate dodecacalcium phosphor (12CaO 7Al 2 o 3 :Er 3+ 0.1% mol, Yb 3+ 5.0% mol).

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Abstract

The invention belongs to the technical field of materials, and in particular relates to upconversion fluorescent powder and a preparation method thereof. The preparation method comprises the following steps of: preparing an Er<3+> / Yb<3+>codoped mayenite gel precursor by adopting a chemical coprecipitation method, proportionally dissolving high-purity Er2O3, Yb2O3, Al(NO3)3.9H2O and Ca(NO3)2.4H2O into deionized water, dripping a proper amount of nitric acid, heating and uniformly stirring; adding a proper amount of precipitator NH3.H2O, drying the obtained gel precursor, and sintering to obtain Er<3+> / Yb<3+>codoped mayenite up-conversion fluorescent powder. Mayenite is used as a base material, and because the band-gap width thereof reaches 5.9eV, the temperature quenching effect of Er<3+> ion luminescence can be weakened, which is beneficial to the upconversion emission of Er<3+> ions. The Er<3+> / Yb<3+>codoped mayenite up-conversion fluorescent powder can be applied to the fields of biological molecular marker probes, optoelectronic devices and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an up-conversion phosphor suitable for preparing high-efficiency output green light and red light. Background technique [0002] Inexpensive, stable and miniaturized short-wavelength, high-power laser output has always been a research hotspot in the field of optoelectronic functional materials and optoelectronic devices. Laser output can be obtained by using frequency doubling of nonlinear optical crystals, direct excitation of wide-bandgap semiconductors, and rare earth ion upconversion technology. Among them, the rare earth ion upconversion technology has low requirements on the stability of the excitation light source, adjustable emission wavelength, and simple structure and many other advantages. [0003] The invention prepares a kind of output green and red up-conversion fluorescent powder based on 980nm laser excitation, Er 3+ / Yb 3+ The co-doped phosphor e...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 刘玉学金家骏祝汉成严端庭刘春光徐长山刘益春钟殿强夏彬
Owner NORTHEAST NORMAL UNIVERSITY
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