er3+/yb3+ co-doped up-conversion luminescent material and preparation method thereof

A luminescent material and co-doping technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of the use and popularization and application of up-conversion luminescent materials, insufficient stability, complicated preparation process, etc., to improve the excitation stability , excellent performance and simple preparation process

Active Publication Date: 2019-04-16
NANJING TONGLI CRYSTAL MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, up-conversion luminescent materials are mainly concentrated in rare earth-doped fluoride, sulfide, halide and other systems, which can realize the emission of red, green, blue and white light. However, in practical applications, due to the insufficient stability of these matrix materials, The preparation process is complex, which has a great impact on the use and promotion of up-conversion luminescent materials

Method used

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  • er3+/yb3+ co-doped up-conversion luminescent material and preparation method thereof
  • er3+/yb3+ co-doped up-conversion luminescent material and preparation method thereof
  • er3+/yb3+ co-doped up-conversion luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of La 0.4 Er 0.6 wxya 12 o 33

[0042] According to the chemical formula La 0.4 Er 0.6 wxya 12 o 33 The stoichiometric ratio of each element in , respectively weighed lanthanum oxide La 2 o 3 : 0.1303 g, erbium oxide Er 2 o 3 : 0.2295 g, ytterbium oxide Yb 2 o 3 : 0.3881 g, tantalum oxide Ta 2 o 5 : 5.3027 g. After grinding and mixing uniformly in an agate mortar, select the air atmosphere for pre-calcination, the pre-calcination temperature is 350 ° C, and the pre-calcination time is 10 hours, then cool to room temperature, take out the sample, fully mix and grind the obtained precursor, In the atmosphere, calcining is carried out at 1150°C for 6 hours, cooled to room temperature, and the sample is taken out and ground to obtain the required tantalate up-conversion luminescent material.

[0043] See attached figure 1 , is the X-ray powder diffraction pattern of the sample prepared by the technical scheme of this embodiment, and the XRD test...

Embodiment 2

[0047] Preparation of La 1.84 Er 0.06 Yb 0.1 Ta 12 o 33

[0048] According to the chemical formula La 1.84 Er 0.06 Yb 0.1 Ta 12 o 33 The stoichiometric ratio of each element in , respectively weigh lanthanum oxide La 2 o 3 : 0.5995 grams, erbium nitrate Er (NO 3 ) 3 ·5H 2 O: 0.0532 g, ytterbium oxide Yb 2 o 3 : 0.0394 g, tantalum oxide Ta 2 o 5 : 5.3027 g. After grinding and mixing uniformly in an agate mortar, choose air atmosphere for pre-calcination, the pre-calcination temperature is 850 ° C, and the pre-calcination time is 1 hour, then cool to room temperature, take out the sample, fully mix and grind the obtained precursor, and In an air atmosphere, calcining is carried out at 1250° C. for 4 hours, cooled to room temperature, and the samples are taken out and ground to obtain the required tantalate up-conversion luminescent material.

[0049] Its main structural morphology and luminescence spectrum are similar to those of Example 1.

Embodiment 3

[0051] Preparation of La 1.984 Er 0.002 Yb 0.014 Ta 12 o 33

[0052] According to the chemical formula La 1.984 Er 0.002 Yb 0.014 Ta 12 o 33 The stoichiometric ratio of each element in , respectively weigh lanthanum oxide La 2 o 3 : 0.6464 g, erbium oxide Er 2 o 3 : 0.0008 g, ytterbium nitrate Yb (NO 3 ) 3 ·5H 2 O: 0.0126 g, tantalum oxide Ta 2 o 5 : 5.3027 g. After grinding and mixing uniformly in an agate mortar, select the air atmosphere for pre-calcination, the pre-calcination temperature is 750 ° C, and the pre-calcination time is 4 hours, then cool to room temperature, take out the sample, and fully mix and grind the obtained precursors. In an air atmosphere, calcining is carried out at 1000° C. for 12 hours, cooled to room temperature, and the sample is taken out and ground to obtain the desired tantalate up-conversion luminescent material.

[0053] Its main structural morphology and luminescence spectrum are similar to those of Example 1.

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Abstract

The invention discloses an Er<3+> / Yb<3+> co-doped up-conversion luminescent material and a preparation method thereof, and belongs to the technical field of inorganic luminescent materials. The chemical composition of the Er<3+> / Yb<3+> co-doped up-conversion luminescent material is La2-2 (x + y) Er2xYb2yTa12O33, wherein x is the doped molar ratio of erbium ion Er<3+>, y is the doped molar ratio of ytterbium ion Yb<3+>, and 0.001<=x+y< 1. The Er<3+> / Yb<3+> co-doped up-conversion luminescent material can be prepared by a high temperature solid state reaction, chemical synthesis method or coprecipitation method, by use of 970 nm near-infrared light for excitation, the Er<3+> / Yb<3+> co-doped up-conversion luminescent material can emit green fluorescence, has the advantages of high luminescence purity, stable performance, small phonon energy, good up-conversion luminescence properties, simple sample preparation operation, rich sources of raw materials, low cost, radiation resistance, no toxicity and no pollution to the environment, and is suitable for industrial production.

Description

technical field [0001] The invention relates to an up-conversion luminescent material and a preparation method, in particular to Er 3+ / Yb 3+ A doped up-conversion luminescent material and a preparation method thereof belong to the technical field of inorganic luminescent materials. Background technique [0002] Up-conversion luminescent material is a luminescent material belonging to the anti-Stokes luminescence phenomenon. Its luminescence principle is that when the light source shines on the surface of the material, the particles will absorb two or more low-energy excitation photons, and the electrons will transition from the ground state to high-energy. state, and then radiate high-energy photons outward, and the frequency of the radiated high-energy photons is greater than the frequency of the absorbed light, which is a process of up-conversion luminescence. [0003] Up-conversion luminescent materials are mainly doped with rare earth elements to achieve their lumines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
CPCC09K11/7769
Inventor 乔学斌聂新明
Owner NANJING TONGLI CRYSTAL MATERIALS RES INST CO LTD
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