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Yb3+-doped vanadate up-conversion fluorescent material and preparation method thereof

A fluorescent material and vanadate technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems that vanadate has not been reported in the literature

Inactive Publication Date: 2012-07-18
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the upconversion luminescence of vanadate activated by trivalent ytterbium ions has not been reported in the literature

Method used

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  • Yb3+-doped vanadate up-conversion fluorescent material and preparation method thereof
  • Yb3+-doped vanadate up-conversion fluorescent material and preparation method thereof
  • Yb3+-doped vanadate up-conversion fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of upconversion luminescent material Ca 9 La 0.9 Yb 0.1 (VO 4 ) 7

[0031] Weigh calcium carbonate CaCO 3 : 4.5041 g, lanthanum oxide La 2 o 3 : 0.7331 g, ytterbium oxide Yb 2 o 3 : 0.1 g, and ammonium vanadate NH 4 VO 3 : 4.0943 grams, ground in an agate mortar and mixed evenly, select the air atmosphere for the first calcination, the temperature is 300 ℃, the calcination time is 3 hours, then cool to room temperature, take out the sample. After the first calcination of the raw materials, the mixture is fully mixed and ground again, and then sintered for the second time at 630°C in an air atmosphere. The sintering time is 5 hours, and cooled to room temperature; again, the mixture is fully mixed and ground evenly , in the air atmosphere, the third sintering at 1000 ° C, the sintering time is 6 hours, cooled to room temperature; that is, powdery Yb 3+ Doped rare earth calcium vanadate based up-conversion fluorescent material.

[0032] See attach...

Embodiment 2

[0035] Preparation of upconversion luminescent material Ca 9 La 0.2 Yb 0.8 (VO 4 ) 7

[0036] Weigh calcium carbonate CaCO 3 : 4.5041 g, lanthanum oxide La 2 o 3 : 0.163 g, ytterbium oxide Yb 2 o 3 : 0.7882 g, and ammonium vanadate NH 4 VO 3 : 4.0943 grams, ground in an agate mortar and mixed evenly, select the air atmosphere for the first calcining, the temperature is 450 ℃, the calcining time is 5 hours, then cool to room temperature, take out the sample. After the raw material calcined for the first time, the mixture is fully mixed and ground again, and then sintered for the second time at 950°C in the air atmosphere. The sintering time is 10 hours, and cooled to room temperature; that is, powdery Yb is obtained. 3+ Doped rare earth calcium vanadate based up-conversion fluorescent material.

[0037] See attached image 3 , which is the up-conversion luminescence spectrum diagram of the sample prepared according to the technical scheme of this embodiment under t...

Embodiment 3

[0039] Preparation of upconversion luminescent material Ca 9 Gd 0.2 Yb 0.8 (VO 4 ) 7

[0040] Weigh calcium carbonate CaCO 3 : 4.5041 g, gadolinium oxide Gd 2 o 3 : 0.1813 g, ytterbium oxide Yb 2 o 3 : 0.7882 g, and ammonium vanadate NH 4 VO 3 : 4.0943 grams, after grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first calcination, the temperature is 500 ° C, the calcination time is 6 hours, then cooled to room temperature, and the sample is taken out. Mix and grind the mixture thoroughly again, and sinter for the second time at 1050°C in an air atmosphere. The sintering time is 7 hours, and cooled to room temperature; that is, powdery Yb is obtained. 3+ Doped rare earth calcium vanadate based up-conversion fluorescent material. The up-conversion luminescence spectrum of the sample prepared by the technical scheme of this embodiment is similar to that of Figure 3.

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Abstract

The invention relates to a Yb3+-doped vanadate up-conversion fluorescent material and a preparation method of the material, belonging to the field of luminous materials and preparation technology of the luminous materials. The chemical composition of the Yb3+-doped vanadate up-conversion fluorescent material is expressed by the general formula: Ca9Ln(1-x)Ybx(VO4)7, wherein x is the molar percentage of Yb3+ doping amount, x is greater than 0.0001 and is less than or equal to 1.0, and Ln is at least one of La3+, Gd3+, Lu3+ and Y3+; and the preparation method is a high-temperature solid-phase method or chemical solution method. The fluorescent material can realize up-conversion luminescence of a blue green color under the excitation of 980nm infrared laser, and can be applied to the detection of infrared light and also can be used for the fields of goods anti-counterfeiting, biological mark and the like.

Description

technical field [0001] The invention relates to an up-conversion fluorescent material and a preparation method thereof, in particular to an up-conversion material emitting visible blue-green light under infrared light excitation, and belongs to the technical field of luminescent materials. Background technique [0002] Rare earth ion ytterbium Yb 3+ It is an active ion with very good luminescence performance. Its biggest feature is that its energy level structure is very simple. 2 f 7 / 2 with 2 f 5 / 2 Two isolated energy levels, Yb 3+ The characteristic light absorption of ions is within the wavelength range between 0.1-1.0 microns, and has a very wide absorption bandwidth, so Yb 3+ Ion-doped materials can be effectively coupled with InGaAs semiconductor pumping light sources; in addition, doped Yb 3+ Ionic laser materials do not have excited state absorption, usually have high fluorescence efficiency and long fluorescence lifetime. Therefore doping Yb 3+ Ionic laser m...

Claims

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Application Information

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IPC IPC(8): C09K11/82C09K11/69
Inventor 黄彦林韦之豪袁蓓玲杜福平王佳宇朱睿
Owner SUZHOU UNIV
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