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Upconversion fluorescent material and preparation method thereof

A technology of fluorescent materials and inert gases, applied in the field of optoelectronic materials, to achieve the effects of high melting point, high up-conversion efficiency, and easy realization of rare earth ion doping performance

Active Publication Date: 2013-06-26
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, with trivalent Yb 3+ Ion-activated GaN upconversion luminescent materials have not been reported in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The present invention also provides a preparation method for the above-mentioned up-conversion fluorescent material, comprising the following steps:

[0029] Step S110: Weigh metal Ga, metal Yb, Re and Si respectively according to the molar ratio of (1-x-y-z): y:x:z, wherein, Re is rare earth metal Er, Tm, Ho, Pr, Sm or Dy Any one, 0.1%≤x≤2%, x≤y≤5x, 0.01%≤z≤0.1%.

[0030] Step S120: Vacuum-encapsulate the weighed metal Ga, metal Yb, Re, Si and catalyst Bi in a glass test tube, wherein the number of moles of the catalyst Bi is t, 0.001(1-x-y-z)≤t≤0.005 (1-x-y-z).

[0031] It can be understood that since rare earth-doped GaN has poor conductivity, in the embodiment provided by the present invention, a small amount of Si is doped into the above-mentioned up-conversion fluorescent material, thereby improving the conductivity of the up-conversion fluorescent material.

[0032] In addition, during the solid-state reaction process of generating GaN, since the generated GaN ...

Embodiment 1

[0043] According to the preparation method, in this embodiment, x=0.1%, y=0.1%, z=0.01%, t=0.09979%, and Re is the rare earth metal Er. Put the above-mentioned weighed raw materials into a glass test tube, mix them evenly, and then vacuum seal; put the vacuum-packed glass test tube into a tube furnace, and place it in an inert gas atmosphere N 2 Calcined at a temperature of 700°C for 9 hours; opened the calcined glass test tube, took out the mixture in the test tube, and placed the mixture in a corundum boat. The above-mentioned corundum boat is placed in a tube furnace, and the flow rate of 200 sccm inert gas N 2 After purging the tube furnace for 1 h, when the temperature was raised to 600 °C, the N 2 Flow gas switched to first NH 3 , the first NH 3 The flow rate is 200sccm, when the temperature of the system rises to 1000°C, the constant temperature nitriding is carried out, and the holding time is 4h; continue to raise the temperature to 1030°C, and the first NH 3 Swit...

Embodiment 2

[0045] According to the preparation method, in this embodiment, x=0.1%, y=0.5%, z=0.1%, t=0.0993%, and Re is the rare earth metal Tm. Put the above-mentioned weighed raw materials into a glass test tube, mix them evenly, and then vacuum seal; put the vacuum-packed glass test tube into a tube furnace, place it in an inert gas atmosphere Ar, and calcinate at a temperature of 800 ° C for 10 hours; Open the calcined glass test tube, take out the mixture in the test tube, and place the mixture in a corundum boat. The above-mentioned corundum boat is placed in a tube furnace, and the flow rate of 500 sccm inert gas N 2 After purging the tube furnace for 1 h, when the temperature was raised to 600 °C, the N 2 Flow gas switched to first NH 3 , the first NH 3 The flow rate is 300sccm, when the temperature of the system is raised to 950°C, the constant temperature nitriding is carried out, and the holding time is 5h; continue to raise the temperature to 1030°C, and the first NH 3 Sw...

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PUM

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Abstract

The invention provides an upconversion fluorescent material. According to the material, GaN serves as a basic substance, Yb<3+> serves as a sensitizing agent, the chemical composition of the material is Ga(1-x-y-x)YbyRexSiZN, wherein Re is selected from arbitrary one of rare earth metals such as Er, Tm, Ho, Pr, Sm and Dy, 0.1%<=x<=2%, x<=y<=5x, and 0.01%<=z<=0.1%. In addition, the invention further provides a preparation method of the upconversion fluorescent material. According to the upconversion fluorescent material provided by invention, GaN serves as the basic substance, the good thermal stability, high melting point and easy rare earth ion doping performance of the GaN are effectively utilized; and moreover, the GaN serves as the basic substance, the upconversion efficiency is increased, so that the prepared upconversion fluorescent material has good thermal stability and high upconversion efficiency.

Description

technical field [0001] The invention belongs to the field of photoelectric materials, and relates to an up-conversion fluorescent material and a preparation method thereof. Background technique [0002] Up-conversion fluorescent materials can emit visible light and even ultraviolet light under the excitation of infrared radiation. aroused great concern of researchers. [0003] The third-generation semiconductor material GaN and its related devices have broad application prospects in optical display, optical storage, laser printing, optical lighting, medical and military fields, so the third-generation semiconductor material represented by GaN is known as IT A new engine for the industry. Compared with the traditional phosphor matrix, GaN has the advantages of good chemical stability, high melting point, and easy doping of rare earth ions. Single-doped rare earth GaN utilizes the f-f forbidden transition of rare earth ions, so the energy conversion rate is low and the up-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 曾雄辉史建平刘宗亮张育民王建峰张锦平徐科
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI