Method of quenching up-conversion luminescence

A quenching and fluorophore technology, applied in the field of luminescence, can solve the problems of optical amplifier efficiency decline, affect the performance of materials and devices, reduce energy transfer, etc., and achieve the effect of good application range, unique functions and characteristics, and simple physical process

Inactive Publication Date: 2016-01-06
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, cooperative luminescence may become an obstacle affecting the performance of materials and devices in some important applications
For example, at high power Er-doped 3+ amplifier, if the material is co-doped with Yb 3+ The ions form ion pairs or fluorescent clusters. Under the excitation of 980nm laser, Yb 3+ The ion pair and the fluorophore cluster have a high probability of producing a cooperative transition, and the Yb 3+ The 980nm photon energy absorbed by the ion is emitted in the form of high-energy photons, thereby reducing the Yb 3+ ion to Er 3+ energy transfer, resulting in the doping of Er 3+ Optical Amplifier Efficiency Drops

Method used

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  • Method of quenching up-conversion luminescence
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  • Method of quenching up-conversion luminescence

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Weigh a certain amount of CaF according to the molar ratio 2 and YbF 3 , fully ground to make it evenly mixed, put it into platinum or other non-corrosive crucibles, place it in a vacuum environment at 1450 ° C for 4 hours, and take it out after naturally cooling to room temperature to obtain a white mixed crystal material. Under the excitation of 980nm near-infrared light, CaF prepared under high temperature conditions 2 :0.5mol%Yb 3+ The mixed crystal material emits bright green fluorescence; spectral analysis shows that the green fluorescence comes from Yb 3+ Cooperative luminescence of ion pairs. As the test temperature decreases, the green cooperation glow becomes stronger and stronger, figure 1 It is the emission spectrum measured at a low temperature of 100K. At a low temperature of 13K, the sample emits ultraviolet cooperative luminescence in the ultraviolet spectral region; spectral analysis shows that the ultraviolet fluorescence comes from Yb 3+ Coopera...

Embodiment 2

[0023] Preparation of Yb by Co-precipitation 3+ (2mol%) and Y 3+ (0,0.5,1,2mol%) co-doped CaF 2 powder. The raw material used in the experiment was Ca(NO 3 ) 2 , Yb(NO 3 ) 3 , Y(NO 3 ) 3 and NH 4 HF 2 . First prepare 0.5mol / L of Yb(NO 3 ) 3 , 0.01mol / L of Y (NO 3 ) 3 , 0.5mol / L Ca(NO 3 ) 2 standard aqueous solution. A certain amount of Yb(NO 3 ) 3 , Y(NO 3 ) 3 and Ca(NO 3 ) 2 The solution was put into a beaker and stirred for 30min, then the solution was added dropwise to NH 4 HF 2 Aqueous solution (15mol / L) was stirred for 1 hour to make it mix uniformly. The stirred mixture was filtered with filter paper, the resulting precipitate was washed with deionized water, dried at 95°C for 12 hours, and calcined at 1200°C for 2 hours to obtain a series of different Y 3+ Doped mole fraction of CaF 2 :Yb 3+ ,Y 3+ sample.

[0024] XRD studies show that the material matrix prepared by the above method is CaF 2 , with a cubic crystal structure. The XRD diff...

Embodiment 3

[0027] Preparation of Yb by Co-precipitation 3+ (1mol%) and Pb 2+ (0,0.3,0.5,0.8,1,2,3,4,6mol%) co-doped CaF 2 powder. The raw material used in the experiment was Ca(NO 3 ) 2 , Yb(NO 3 ) 3 , Pb(NO 3 ) 2 and NH 4 HF 2 . First prepare 0.5mol / L of Yb(NO 3 ) 3 , 0.01mol / L of Pb(NO 3 ) 2 , 0.5mol / L Ca(NO 3 ) 2 standard aqueous solution. A certain amount of Yb(NO 3 ) 3 , Pb(NO 3 ) 2 and Ca(NO 3 ) 2 The solution was put into a beaker and stirred for 30min, then the solution was added dropwise to NH 4 HF 2 Aqueous solution (15mol / L) was stirred for 1 hour to make it mix uniformly. The stirred mixture was filtered with filter paper, the resulting precipitate was washed with deionized water, dried at 95°C for 12 hours, and calcined at 1200°C for 2 hours to obtain a series of different Pb 2+ Doped mole fraction of CaF 2 :Yb 3+ ,Pb 2+ sample.

[0028] Under 980nm light excitation, we measured the CaF 2 :0.5%Pb 2+ and CaF 2 :1%Yb 3+ ,x%Pb 2+ (x=0, 0.3, 0....

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Abstract

The invention discloses a method of quenching up-conversion luminescence, and belongs to the technical field of luminescence. The method comprises the following steps: doping other metal cations into an inorganic Yb<3+> ion fluorescent cluster material, and breaking a fluorescent cluster structure in the material, thus making structure destructive quenching of clustered fluorescence, wherein a matrix of the inorganic Yb<3+> ion fluorescent cluster material is an alkaline earth metal fluoride; in terms of the sum of the mole concentrations of all the metal cations of 100 percent, the doping concentration of trivalent lanthanide ytterbium ion Yb<3+> is 0.05 to 10 mol%, and the doping concentration of other metal cations is 0.1 to 14 mol%. The doped cations can be either rare earth ions without fluorescence characteristics or other types of ions. By the use of the fluorescence quenching method, the intensity of cooperative luminescence can be effectively adjusted, and the up-conversion luminous intensity generated by cooperation sensitization can be also effectively adjusted. Therefore the quenching method is extremely wide in use range.

Description

technical field [0001] The invention belongs to the technical field of luminescence, and in particular relates to a method for quenching up-conversion luminescence. Background technique [0002] Cooperative luminescence is a more efficient up-conversion luminescence. It is the luminescence produced by the cooperative transition of two or more lanthanide ions of the same kind. Cooperative luminescence is usually emitted by fluorescent clusters composed of lanthanide ions in close proximity. In addition, by the same lanthanide ions (such as Yb 3+ ) clusters can also cause other ions with high energy levels to produce upconversion luminescence through cooperative sensitization. For example, put Yb 3+ and Pb 2+ Co-doping into CaF 2 Among them, a broadband ultraviolet up-conversion luminescence of ~382nm can be emitted under the excitation of 980nm near-infrared light. [0003] However, cooperative light emission may become an obstacle affecting the performance of material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61
Inventor 秦伟平吐尔逊·艾迪力比克
Owner JILIN UNIV
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