Gd < 3 + >-doped micron crystal material as well as preparation method and application thereof

A crystal material and crystal technology, applied in the field of Gd3+ doped micron crystal material and its preparation, can solve the problems of limited application, low conversion fluorescence efficiency and low luminous intensity of rare earth luminescent materials, and achieve up-conversion luminescence enhancement, excited state particles The effect of increasing the number and increasing the energy transfer rate

Active Publication Date: 2022-07-15
XIAN UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing rare earth luminescent materials have limited their application in various fields due to their low up-conversion fluorescence efficiency and low luminous intensity.

Method used

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  • Gd &lt; 3 + &gt;-doped micron crystal material as well as preparation method and application thereof
  • Gd &lt; 3 + &gt;-doped micron crystal material as well as preparation method and application thereof
  • Gd &lt; 3 + &gt;-doped micron crystal material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a Gd 3+ Doped microcrystalline material, in this embodiment, its chemical formula is LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ , and Gd 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 10mol% of the total amount of rare earth elements, Yb 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 20mol% of the total amount of rare earth elements, Ho 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 1 mol% of the total amount of rare earth elements in the medium, and the microcrystalline material of this embodiment is denoted as LiY 0.69 F 4 :Yb 0.2 / Ho 0.01 / Gd 0.1 .

[0041] And the preparation method of the microcrystalline material of this embodiment is as follows:

[0042] 1 mmol of dispersant EDTA was placed in 20 mL of water, heated at a constant temperature of 60 °C, stirred at a rate of 1200 r / min for 10 min, so that EDTA was fully dissolved and uniformly dispersed in the water, then 1 mmol of rare earth eleme...

Embodiment 2

[0047] This embodiment provides a Gd-doped 3+ LiYF 4 :Yb 3+ / Ho 3+ Microcrystalline material, in this embodiment, its chemical formula is LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ , and Gd 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 20mol% of the total rare earth elements, Yb 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 20mol% of the total amount of rare earth elements, Ho 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 1 mol% of the total amount of rare earth elements in the medium, and the microcrystalline material of this embodiment is denoted as LiY 0.59 F 4 :Yb 0.2 / Ho 0.01 / Gd 0.2 .

[0048] And the difference between the preparation method of the microcrystalline material of the present embodiment and the embodiment 1 is only:

[0049] In this embodiment, the rare earth element source is Y(NO 3 ) 3 ·6H 2 O, Gd (NO 3 ) 3 ·6H 2 O, Yb (NO 3 ) 3 ·5H 2 O and Ho(NO 3 ) 3 ·5H 2 mixed solution of O, and Y (NO 3 ) ...

Embodiment 3

[0051] This embodiment provides a Gd-doped 3+ LiYF 4 :Yb 3+ / Ho 3+ Microcrystalline material, in this embodiment, its chemical formula is LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ , and Gd 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 30mol% of the total amount of rare earth elements, Yb 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 20mol% of the total amount of rare earth elements, Ho 3+ The doping concentration of LiYF 4 :Yb 3+ / Ho 3+ / Gd 3+ 1 mol% of the total amount of rare earth elements in the medium, and the microcrystalline material of this embodiment is recorded as LiY 0.49 F 4 :Yb 0.2 / Ho 0.01 / Gd 0.3 . And the difference between the preparation method of the microcrystalline material of the present embodiment and the embodiment 1 is only:

[0052] In this embodiment, the rare earth element source is Y(NO 3 ) 3 ·6H 2 O, Gd (NO 3 ) 3 ·6H 2 O, Yb (NO 3 ) 3 ·5H 2 O and Ho(NO 3 ) 3 ·5H 2 mixed solution of O, and Y (NO 3 ...

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Abstract

The invention belongs to the technical field of rare earth luminescent materials, and discloses a Gd < 3 + >-doped micron crystal material and a preparation method and application thereof.The micron crystal material is obtained by doping Gd < 3 + > with a Y site of a matrix material LiYF4: Yb < 3 + >/Ho < 3 + > micron crystal, and the doping concentration of Gd < 3 + > is smaller than or equal to 60 mol% of the total amount of rare earth elements in the micron crystal material; the preparation method comprises the following steps: dispersing the dispersing agent in a water solvent, sequentially adding the rare earth element source and the matrix source, uniformly mixing, and preserving heat at 210-250 DEG C for 24-60 hours to obtain the micron crystal material. Gd < 3 + > is used for replacing part of Y < 3 + > in the LiYF4 crystal, so that lattice distortion of the LiYF4 crystal is realized, the field symmetry of the crystal is reduced, the transition probability and the number of excited state particles of Ho < 3 + > are increased, energy transfer between Yb < 3 + > and Ho < 3 + > is accelerated, and up-conversion luminescence of Ho < 3 + > is enhanced.

Description

technical field [0001] The invention relates to the technical field of rare earth luminescent materials, in particular to a kind of Gd 3+ Doped microcrystalline material and preparation method and application thereof. Background technique [0002] In recent years, rare earth functional materials have been widely used in various industries, and the application of rare earth luminescent materials has always been the focus and hotspot of research. Moreover, due to the optical properties of rare earth elements due to their unique 4f electron configuration, rare earth element-doped luminescent materials not only have extremely rich emission colors, but also have good emission efficiency in the visible light band. [0003] However, the existing rare earth luminescent materials have low up-conversion fluorescence efficiency and low luminous intensity, which limit their application in various fields. [0004] To this end, the present invention provides a Gd 3+ Doped microcrystall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09D11/50
CPCC09K11/7773C09D11/50
Inventor 王翀任仲翾党文斌王景华李冬冬韩江浩杨嘉皓
Owner XIAN UNIV OF POSTS & TELECOMM
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