Multiple colour infrared up-conversion luminous material and preparing process thereof

A technology of luminescent materials and color red, which is applied in the direction of luminescent materials, chemical instruments and methods, tungsten compounds, etc., can solve the problems of being unable to pass through, and achieve the effects of low equipment requirements, high stability, and simple process

Inactive Publication Date: 2009-04-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Rare earth ion Er 3+ , Tm 3+ and Ho 3+ Under the excitation of ultraviolet light, green light, blue light, and red light can be emitted respectively, but since the maximum excitation peaks of the three ions in the ultraviolet region are not at the same positio

Method used

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  • Multiple colour infrared up-conversion luminous material and preparing process thereof

Examples

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Effect test

example 1

[0015] press Y 0.78 (WO 4 ) 3 : 0.2Yb, molar ratio of each element in 0.02Tm, accurately weigh 0.0078mol Y 2 o 3 , 0.002molYb 2 o 3 , 0.0002mol Tm 2 o 3 and 0.006mol WO 3 High-purity powder raw materials are placed in an agate mortar and ground for about 30 minutes to fully mix the raw materials evenly. The mixed raw materials were transferred to an alumina crucible, put into a box furnace, and pre-fired at 700°C for 5 hours. Take it out after cooling, grind again for about 15 minutes, then sinter at 1200°C for 8 hours, take it out after natural cooling, and obtain the product. The product has a loose texture. Under the pumping of 30mw 980nm laser, the material can emit dazzling up-conversion blue light with uniform light emission.

example 2

[0017] press Y 0.62 (WO 4 ) 3 : 0.4Yb, molar ratio of each element in 0.08Er, accurately weighed 0.0062mol Y 2 o 3 , 0.004molYb 2 o 3 , 0.0008mol Er 2 o 3 and 0.006mol WO 3 High-purity powder raw materials are placed in an agate mortar and ground for about 30 minutes to fully mix the raw materials evenly. The mixed raw materials were transferred to an alumina crucible, put into a box furnace, and pre-fired at 800°C for 8 hours. Take it out after cooling, grind again for about 15 minutes, then sinter at 1200°C for 4 hours, take it out after natural cooling, and obtain the product. The product has a loose texture. Under the pumping of 30mw980nm laser, the material can emit dazzling up-conversion green light with uniform emission.

example 3

[0019] press Y 0.8 (WO 4 ) 3 : 0.6Yb, molar ratio of each element in 0.2Ho, accurately weighed 0.008mol Y 2 o 3 , 0.006molYb 2 o 3 、0.002mol Ho 2 o 3 and 0.006mol WO 3 High-purity powder raw materials are placed in an agate mortar and ground for about 30 minutes to fully mix the raw materials evenly. The mixed raw materials were transferred to an alumina crucible, placed in a box furnace, and pre-fired at 900°C for 3 hours. Take it out after cooling, grind again for about 15 minutes, then sinter at 1100°C for 10 hours, take it out after natural cooling, and obtain the product. The product has a loose texture. Under the pumping of 30mw980nm laser, the material can emit dazzling up-conversion red light with uniform emission.

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Abstract

The invention discloses a multicolor infrared upconversion luminous material and a preparation method thereof. The material has a chemical composition formula: RE2-x-y(WO4)3: xLn,yYb, wherein x is between 0.02 and 0.2; y is between 0.2 and 0.6; Yb<3+> is used as a sensitizing agent, absorbs infrared photons and transfers energy to Ln in order that Ln ions irradiate; and under 980nm laser pumping, the material emits red light, green light, blue light or white light. In preparation, according to stoichiometric ratio, high-purity raw materials of rare earth oxide and tungsten trioxide are ground, are evenly mixed, are presintered for 3 to 10 hours in air at a temperature of between 700 and 900 DEG C, are ground, are sintered for 4 to 10 hours in the air at a temperature of between 1,100 and 1,200 DEG C and are naturally cooled to the room temperature, so as to obtain the product. In the preparation process, no organism is used; and no harmful exhaust gas is produced. The synthetic process is carried out in the air; and the preparation method has low equipment requirement and a simple process.

Description

technical field [0001] The invention relates to a luminescent material, in particular to an infrared up-conversion luminescent material capable of emitting red light, green light, blue light and white light and a preparation method thereof. Background technique [0002] Up-conversion luminescent materials can convert infrared light into visible light, so they are expected to be used in display, red light detection and camouflage, optical storage, etc. (Related literature: J.Phys.Chem.B 2004, 108, 19205; 2005, 123, 174710; patent CN200710009067.1). Up-conversion luminescent nanocrystals are also considered to be a good biological calibration material, which can track and determine biomolecules such as DNA, RNA, and protein, and can be used in medical fields such as immunity, diagnosis, and treatment (relevant literature: Nano lett. 2004, 4 , 2191; Adv. Mater. 2005, 17, 2119). Biomolecules do not absorb the commonly used 980nm infrared laser, that is to say, biomolecules are...

Claims

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Application Information

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IPC IPC(8): C09K11/78C01G41/00
CPCY02B20/181Y02B20/00
Inventor 潘跃晓
Owner SOUTH CHINA UNIV OF TECH
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