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Rare earth up-conversion fluorescent material doped with luminescent center in different regions and preparation method thereof

A rare earth up-conversion and luminescent center technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous efficiency and small amount of doping of luminescent centers, and achieve improved doping threshold, uniform distribution, and enhanced luminous efficiency Effect

Inactive Publication Date: 2011-12-07
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of small doping quantity and low luminous efficiency of the luminescent center of the up-conversion fluorescent material. Therefore, we propose a kind of up-conversion fluorescent material doped with rare earth in the sub-region of the luminescent center and its preparation method

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  • Rare earth up-conversion fluorescent material doped with luminescent center in different regions and preparation method thereof
  • Rare earth up-conversion fluorescent material doped with luminescent center in different regions and preparation method thereof
  • Rare earth up-conversion fluorescent material doped with luminescent center in different regions and preparation method thereof

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specific Embodiment approach 1

[0027] Embodiment 1: A kind of rare earth up-conversion fluorescent material doped with luminescent center in different regions according to the present invention. The specific scheme is as follows. NaYF 4 It is a matrix, doped with rare earth sensitizing ions and rare earth luminescent ions, and has a core / shell structure and nanocrystalline micromorphology. It is characterized in that a layer of luminescent shell is coated outside the core / shell structure, and the outermost layer is Sensitized shell.

[0028] The rare earth sensitizing ion doped by the outermost sensitizing shell layer is Yb 3+ .

[0029] The rare earth luminescent ions doped in the luminescent shell layer are Er 3+ 、Tm 3+ or Ho 3+ .

[0030] NaYF 4 :Er 3+ , Yb 3+ / NaYF 4 :Yb3+ / NaYF 4 :Er 3+ , Yb 3+ / NaYF 4 :Yb 3+ For example, the rare earth sensitizing ion of this kind of rare earth up-conversion fluorescent material and the ion doped by the outermost layer of the sensitizing shell are Yb 3+...

specific Embodiment approach 2

[0036] Specific implementation mode two: the concentration of luminescent centers is 2%

[0037] (1) Luminescent shell precursor NaYF 4 :Er 3+ (2%,) Yb 3+ (20%) preparation:

[0038] 0.272 g CF 3 COONa, 0.376 g Y(CF 3 COO) 3 , 0.113 g Yb (CF 3 COO) 3 and 0.011g of Er(CF 3 COO) 3 Dissolve in 10ml of oleylamine and stir at 100°C for 30 minutes.

[0039] (2) Sensitized shell precursor NaYF 4 :Yb 3+ (20%) preparation:

[0040] 0.272 g CF 3 COONa, 0.376 g Y(CF 3 COO) 3 and 0.126 g of Yb (CF 3 COO) 3 Dissolve in 10ml of oleylamine and stir at 100°C for 30 minutes.

[0041] (3) Add 5ml of luminous shell precursor NaYF to the three-necked flask 4 :Er 3+ (2%,) Yb 3+ (20%) solution, under the protection of argon, gradually warming up to 320 ° C, the heating rate is about 10 ° C / min, stirring and keeping the reaction for 60 minutes to form NaYF 4 :Er 3+ (2%), Yb 3+ (20%) Luminous nuclei.

[0042] (4) Cool the above-mentioned nuclear solution to 150°C, and drop ...

specific Embodiment approach 3

[0046] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the concentration of luminescent centers in this embodiment is 3%.

[0047] combine image 3 Description of this embodiment

[0048] (1) Luminescent shell precursor NaYF 4 :Er 3+ (3%,) Yb 3+ (20%) preparation:

[0049] 0.272 g CF 3 COONa, 0.376 g Y(CF 3 COO) 3 , 0.113 g Yb (CF 3 COO) 3 and 0.017g gram Er(CF 3 COO) 3 Dissolve in 10ml of oleylamine and stir at 100°C for 30 minutes.

[0050] (2) Sensitized shell precursor NaYF 4 :Yb 3+ (20%) preparation:

[0051] 0.272 g CF 3 COONa, 0.376 g Y(CF 3 COO) 3 and 0.126 g of Yb (CF 3 COO) 3 Dissolve in 10ml of oleylamine and stir at 100°C for 30 minutes.

[0052] (3) Add 5ml of the luminous shell precursor NaYF to the three-necked flask 4 :Er 3+ (2%,) Yb 3+ (20%) solution, under the protection of argon, gradually warming up to 320 ° C, the heating rate is about 10 ° C / min, stirring and keeping the reaction for 60 minutes to for...

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Abstract

The invention discloses a luminescent centre regionally doped rare earth upconversion luminescent material and a preparation method thereof, which relates to the technical field of structural design and preparation of luminescent materials. For solving the problems of small doping amount in the luminescent center and low luminescent efficiency of the rare earth upconversion luminescent material, the conventional materials of the same kind take NaYF4 as a matrix, are doped with rare earth sensitized ions and rare earth luminescent ions and has a core / shell structure and nanocrystalline micro structure, wherein a luminescent shell layer is coated outside the core / shell structure, and a sensitized layer is the outmost layer. The preparation method of the rare earth upconversion luminescent material comprises: after a trifluoroacetate thermal decomposition method is implemented, adding a luminescent shell layer precursor into solution of nanoparticle colloid with the luminescent core / shell structure, heating, and reacting to form the luminescent shell layer; cooling the product obtained by the previous step, adding a sensitized shell precursor layer, heating, reacting and obtaining a sensitized shell layer on the outside of the luminescent shell layer; and thus, obtaining the luminescent centre regionally doped rare earth upconversion luminescent material.

Description

technical field [0001] The invention relates to a luminescent center doped rare earth up-conversion fluorescent material in subregions and a preparation method thereof, and belongs to the technical field of luminescent material structure design and preparation thereof. Background technique [0002] Fluorescent labeling is the process of covalently attaching fluorescent groups to molecules such as proteins and nucleic acids. This technique is used in a variety of detection systems to achieve sensitive and quantitative detection. At present, there are mainly three types of materials used as luminescent markers: organic fluorescent materials, semiconductor quantum dots and rare earth up-conversion fluorescent materials. Among them, the rare earth up-conversion fluorescent material is a fluorescent material that converts near-infrared light into visible light through lanthanide doping. Compared with organic fluorescent materials and semiconductor quantum dots, rare earth up-co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85
Inventor 刘晓敏孔祥贵涂浪平张友林曾庆辉
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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