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Method for improving photoluminescence efficiency of upconversion material

A conversion material, photoluminescence technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low fluorescence efficiency, limit the process of industrial application, etc., and achieve the effect of improving the intensity of photoluminescence

Inactive Publication Date: 2012-06-27
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low fluorescence efficiency determined by the physical mechanism of upconversion, its industrial application in various fields is limited.

Method used

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  • Method for improving photoluminescence efficiency of upconversion material
  • Method for improving photoluminescence efficiency of upconversion material
  • Method for improving photoluminescence efficiency of upconversion material

Examples

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Embodiment 1

[0021] An effective method for improving the photoluminescence efficiency of up-conversion materials, using a co-sintering process to prepare NaY containing silver nanoparticles 1-x-y Yb x Er y F 4 Up-conversion material, where x=0.18, y=0.02, the steps are as follows:

[0022] 1) Configure 90 ml of silver nitrate with a concentration of 0.5 mmol / L (AgNo 3 1) The solution was mixed with 10 ml of 0.15% sodium citrate solution, and stirred at a constant temperature of 80°C for 2 hours to prepare a sol containing silver nanoparticles;

[0023] 2) Configure 0.2 mol / L ytterbium chloride (YbCl 3 ), chlorinated bait (ErCl 3 ), sodium chloride (NaCl), yttrium chloride (YCl 3 ) And ethylenediaminetetraacetic acid disodium (EDTA) aqueous solution, configure 30mL yttrium chloride (YCl 3 ), Ytterbium chloride (YbCl 3 ) And chlorinated bait (ErCl 3 ) Mixed aqueous solution, where Y 3+ :Yb 3+ :Er 3+ =40:9:1, add 30mL of 0.2 mol / L sodium chloride (NaCl) aqueous solution, 48mL of 0.2 mol / L EDTA aque...

Embodiment 2

[0027] An effective method for improving the photoluminescence efficiency of up-conversion materials, using a co-sintering process to prepare NaY containing silver nanoparticles 1-x-y Yb x Er y F 4 Up-conversion material, where x=0.27, y=0.03, the steps are as follows:

[0028] 1) Configure 90 ml of silver nitrate with a concentration of 1.0 mmol / L (AgNo 3 1) The solution is mixed with 10 ml of 0.2% sodium citrate solution with mass fraction, and stirred at 100°C for 1 hour to prepare a sol containing silver nanoparticles;

[0029] 2) Configure 0.2 mol / L ytterbium chloride (YbCl 3 ), chlorinated bait (ErCl 3 ), sodium chloride (NaCl), yttrium chloride (YCl 3 ) And ethylenediaminetetraacetic acid disodium (EDTA) aqueous solution, configure 30mL yttrium chloride (YCl 3 ), Ytterbium chloride (YbCl 3 ) And chlorinated bait (ErCl 3 ) Mixed aqueous solution, where Y 3+ :Yb 3+ :Er 3+ =23.3:9:1, add 30mL of 0.2 mol / L sodium chloride (NaCl) aqueous solution, 48mL of 0.2 mol / L EDTA aqueous sol...

Embodiment 3

[0033] An effective method for improving the photoluminescence efficiency of up-conversion materials, using a co-sintering process to prepare NaY containing silver nanoparticles 1-x-y Yb x Er y F 4 Up-conversion material, where x=0.18, y=0.02, the steps are as follows:

[0034] 1) Configure 90 ml of silver nitrate with a concentration of 1.5 mmol / L (AgNo 3 1) The solution was mixed with 10 ml of 0.4% sodium citrate solution, and stirred at a constant temperature of 120°C for 0.5 hours to prepare a sol containing silver nanoparticles;

[0035] 2) Configure 0.2 mol / L ytterbium chloride (YbCl 3 ), chlorinated bait (ErCl 3 ), sodium chloride (NaCl), yttrium chloride (YCl 3 ) And ethylenediaminetetraacetic acid disodium (EDTA) aqueous solution, configure 30mL yttrium chloride (YCl 3 ), Ytterbium chloride (YbCl 3 ) And chlorinated bait (ErCl 3 ) Mixed aqueous solution, where Y 3+ :Yb 3+ :Er 3+ =30:9:1, add 30mL of 0.2 mol / L sodium chloride (NaCl) aqueous solution, 48mL of 0.2 mol / L EDTA aq...

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Abstract

The invention relates to a method for improving photoluminescence efficiency of an upconversion material. The method is used for preparing the NaY1-x-yYbxEryF4 upconversion material containing nano-silver particles by a co-sintering process, and the photoluminescence efficiency of the NaY1-x-yYbxEryF4 upconversion material containing the nano-silver particles can be effectively improved by effectively mixing the nano-silver particles with the upconversion material and utilizing a resonance enhancement property of a high-energy local electric field of localization surface plasmon polaritons to the nonlinear optical process. The method disclosed by the invention has the benefits that the emission peak intensity at 411nm, 524nm, 544nm and 657nm can be improved by above 15% under the excitation of incident photons in the wavelength of 980nm, the gain which is above 20% can be obtained in a full spectrum range between 300-800nm, and a fluorescence enhancement effect is significant.

Description

technical field [0001] The invention relates to the preparation technology of fluorescent materials, in particular to a method for improving the photoluminescence efficiency of up-conversion materials. Background technique [0002] The up-conversion material is a multi-photon process luminescent material that radiates short-wave photons under the excitation of long-wave photons by using the anti-Stokes effect. Through the energy level characteristics of the rare earth ions doped in the matrix, the excited state absorbs energy and excites to an energy level higher than the pump energy, and radiatively transitions to emit up-conversion fluorescence. [0003] At present, the luminescence achieved by up-conversion covers almost every band of visible light. In recent years, up-conversion luminescent materials have shown good application prospects in the fields of laser technology, three-dimensional display, fluorescent molecular biomarkers and photovoltaic technology. However, ...

Claims

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Application Information

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IPC IPC(8): C09K11/85
Inventor 黄茜张晓丹赵颖魏长春
Owner NANKAI UNIV
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