Er3+/ Yb3+ co-doping calcium fluoraluminate green up-conversion luminescent material and preparation method thereof

A technology of calcium heterofluoroaluminate and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of poor thermal stability of fluoride, and achieve good thermal stability, strong tissue penetration ability, and stable performance. Effect

Inactive Publication Date: 2018-08-10
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the object of the present invention is to prepare a calcium fluoroaluminate green up-conversion luminescent fluorescent material with good stability and capable of near-infrared light excitation. The luminescent material emits narrow-band green light under near-infrared light excitation. , can overcome the defect of poor thermal stability of fluoride, which is conducive to expanding the application field of up-conversion luminescent materials

Method used

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  • Er3+/ Yb3+ co-doping calcium fluoraluminate green up-conversion luminescent material and preparation method thereof
  • Er3+/ Yb3+ co-doping calcium fluoraluminate green up-conversion luminescent material and preparation method thereof

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Effect test

example 1

[0023] (1) Weighing CaCO 3 (99.99%) 1.1771g, Al 2 o 3 (99.99%) 0.71372g, CaF 2 (99.99%) 0.07808g, Er 2 o 3 (99.99%)0.00459g, Yb 2 o 3 (99.99%) 0.04256g is placed in a mortar, grinds with ethanol as a dispersant, and grinds to make the raw materials fully mix and then dry;

[0024] (2) pre-burning the dried raw materials at 850°C for 2 hours, and then grinding for 1 hour;

[0025] (3) calcining the fully mixed raw materials at 1200° C. for 10 hours in an air atmosphere;

[0026] (4) After grinding, the Er excited by near-infrared light is obtained 3+ / Yb 3+ Co-doped calcium fluoroaluminate upconversion luminescent material (Ca 11.98 al 14 o 32 f 2 :Er 0.002 / Yb 0.018 )

Embodiment 2

[0028] (1) Weighing CaCO 3 (99.99%) 1.1963g, Al 2 o 3 (99.99%) 0.71372g, CaF 2 (99.99%) 0.07808g, Er 2 o 3 (99.99%)0.00459g, Yb 2 o 3 (99.99%) 0.047g is placed in a mortar, grinds with ethanol as a dispersant, and grinds to make the raw materials fully mix and then dry;

[0029] (2) pre-burning the dried raw materials at 900°C for 2 hours, and then grinding for 1 hour;

[0030] (3) calcining the fully mixed raw materials at 1250° C. for 6 hours in an air atmosphere;

[0031] (4) After grinding, the Er excited by near-infrared light is obtained 3+ / Yb 3+ Co-doped calcium fluoroaluminate upconversion luminescent material (Ca 11.996 al 14 o 32 f 2 :Er 0.002 / Yb 0.002 )

example 3

[0033] (1) Weighing CaCO 3 (99.99%) 2.3494g, Al 2 o 3 (99.99%) 1.42744g, CaF 2 (99.99%) 0.15616g, Er 2 o 3 (99.99%)0.00918g, Yb 2 o 3 (99.99%) 0.0946g is placed in a mortar and grinds with ethanol as a dispersant, and the grinding is drying after the raw materials are fully mixed;

[0034] (2) pre-burning the dried raw materials at 850°C for 2 hours, and then grinding for 1 hour;

[0035] (3) calcining the fully mixed raw materials at 1300° C. for 10 hours in an air atmosphere;

[0036] (4) After grinding, the Er excited by near-infrared light is obtained 3+ / Yb 3+ Co-doped calcium fluoroaluminate upconversion luminescent material (Ca 11.978 al 14 o 32 f 2 :Er 0.002 / Yb 0.02 )

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Abstract

The invention belongs to the technical field of inorganic luminescent materials, and particularly relates to an Er3+ / Yb3+ co-doping calcium fluoraluminate green up-conversion luminescent material triggered by near-infrared light and a preparation method thereof. The method adopts a high temperature solid phase method to prepare the Er3+ / Yb3+ co-doping calcium fluoraluminate, high-purity raw materials of Er2O3, Yb2O3, Al2O3, CaF2 and CaCO3 are evenly mixed in proportion, sintering is carried out to obtain the Er3+ / Yb3+ co-doping calcium fluoraluminate luminescent material. The luminescent material emits green light located at about 550 nanometers under the stimulation of 980-nanometer near-infrared light, and the up-conversion luminescent efficiency is higher; the luminescent material has better stability, is environmentally-friendly, has low cost, and can be widely applied to the fields of three-dimensional volumetric display, biomolecule fluorescent labeling probe, optical fiber amplifier and the like; the preparation method is easy in operation and industrial production, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of inorganic luminescent materials, in particular to Er 3+ / Yb 3+ A co-doped calcium fluoroaluminate green up-conversion luminescent material and a preparation method thereof. Background technique [0002] The up-conversion luminescent material doped with rare earth ions converts near-infrared light invisible to human eyes into visible light that people can see. It has a large Stokes shift and is not disturbed by background light. It can be widely used in three-dimensional display and laser anti-counterfeiting , bioimaging, biodetection, drug carriers, and novel photodynamic therapy of cancer. At present, most high-efficiency upconversion luminescent materials use fluoride, sulfide, and halide substrates with low phonon energy, but these substrates have poor thermal stability, are prone to deliquescence, and are not resistant to radiation, and the preparation process is also complicated. Therefore, to a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
CPCC09K11/7774
Inventor 刘秀玲郭艳艳刘为振王鑫
Owner CHANGCHUN UNIV OF SCI & TECH
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