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Manganese-doped yttrium lithium fluoride up-converting fluorescent material and preparation method thereof

A fluorescent material, the technology of yttrium lithium fluoride, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of less color center formation, low laser power threshold and limitation, achieve enhanced up-conversion luminescence, and easy industrialization promotion , the effect of increasing the degree of uniformity

Inactive Publication Date: 2017-07-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Uniaxial crystal LiYF 4 As the main matrix material, it has been studied by material scientists from all over the world. The high-quality yttrium lithium fluoride crystal doped with rare earth has the advantages of high light transmission, small thermal lens effect, low laser power threshold, and less color center formation. Important laser working material; although the existing LiYF 4 UCNPs as substrates have unique advantages over other UCNPs, but it still has several disadvantages, for example, LiYF 4 : Yb / Tm has strong blue light excitation (about 475nm) and extremely strong near-infrared (NIR) excitation (about 800nm), although the excitation in the NIR region has a high-intensity penetration depth, the excitation light in the blue region cannot escape Deep tissue may cause undesirable side effects that will reduce imaging accuracy, and this effect has not been eliminated; as for LiYF 4 : Yb / Er, which is usually excited by bright green light (about 550nm) and accompanied by weak dark red light (about 660nm), which greatly limits its application in biological tissue imaging, because green light The penetration depth is too shallow and the intensity of the red light is too low to be detected

Method used

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  • Manganese-doped yttrium lithium fluoride up-converting fluorescent material and preparation method thereof
  • Manganese-doped yttrium lithium fluoride up-converting fluorescent material and preparation method thereof
  • Manganese-doped yttrium lithium fluoride up-converting fluorescent material and preparation method thereof

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Embodiment 1

[0024] A kind of Mn 2+ Doped LiREF 4 Preparation method of up-conversion fluorescent material to prepare Mn 2+ Doped LiY 0.78(1-x) Yb 0.2 Er 0.02 F 4 Take the following steps as an example:

[0025] 1) The molar ratio is Y: Mn: Yb: Er=0.78×(1-x): 0.78x: 0.2: 0.02 (x=0, 10%, 25%, 40%), weigh the total amount of 1 mmol Rare earth oxide and manganese oxide powder, put the rare earth oxide and manganese oxide into the reaction vessel, add an appropriate amount of deionized water, add trifluoroacetic acid dropwise under magnetic stirring and heating conditions, a few minutes later, the solid is completely dissolved. Get a clear solution;

[0026] 2) Heat and evaporate the transparent solution described in step 1) to obtain a solid, then add lithium trifluoroacetate, under vacuum, add oleic acid and octadecene, and pass in argon protective gas, raise the temperature to dissolve the solid, and mix The solution is magnetically stirred to remove water and oxygen under the condition of heat...

Embodiment 2

[0035] A kind of Mn 2+ Doped LiREF 4 Preparation method of up-conversion fluorescent material to prepare 10% Mn 2+ Doped LiY 0.9(0.8-y) Yb 0.2 Er (y) F 4 Take the following steps as an example:

[0036] 1) The massage ratio is Y:Mn:Yb:Er=0.9×(0.8-y):0.1:0.2:y (y=1%, 2%, 5%, 7%, 8%, 11%), weigh Take a total of 1 mmol of rare earth oxide and manganese oxide powder, put the rare earth oxide and manganese oxide into the reaction vessel, add an appropriate amount of deionized water, and under the condition of magnetic stirring and heating, add trifluoroacetic acid dropwise, a few minutes later , The solid is completely dissolved and a transparent solution is obtained;

[0037] 2) Heat and evaporate the transparent solution described in step 1) to obtain a solid, then add lithium trifluoroacetate, add oleic acid and octadecene under vacuum, and pass in argon protective gas. The temperature is raised to dissolve the solid and mix The solution is magnetically stirred to remove water and o...

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Abstract

The invention belongs to the technical field of luminescent materials, and particularly relates to a manganese-doped yttrium lithium fluoride up-converting fluorescent material and a preparation method thereof. The manganese-doped yttrium lithium fluoride up-converting fluorescent material is characterized in that the mole percents of Yb<3+>, Er<3+> and Y<3+> are 20%:y%:(80%-x%-y%), x ranges from 0 to 40, y ranges from 1 to 11, and x% is the mole percent of Mn<2+>. The prepared manganese-doped yttrium lithium fluoride up-converting fluorescent material has the characteristics of high degree of dispersity, uniform size and high light intensity, and is prepared by a high-temperature pyrolysis method taking octadecene as a solvent and oleic acid as a complexing agent; the preparation process is simple and is easy to operate and particularly suitable for batch production; the preparation cost of a multi-color luminescent material is greatly lowered; and the manganese-doped yttrium lithium fluoride up-converting fluorescent material has a potential application value in the fields of solid lasers, solar cells, infrared radiation detection, biomedical imaging and the like.

Description

Technical field [0001] The invention belongs to the technical field of up-conversion luminescent materials, and specifically relates to a manganese-doped yttrium lithium fluoride up-conversion fluorescent material and a preparation method thereof. Background technique [0002] Rare earth up-conversion nanomaterials (UCNPs) are an important class of luminescent materials with unique energy level structure and excellent optical properties. Photon upconversion (UC) is a photonics phenomenon, which is characterized by converting several long-wavelength photon energy into a short-wavelength photon energy for radiation. UCNPs have many advantages, such as low toxicity, high chemical stability, excellent light stability, narrow-band emission, long luminescence lifetime, and deeper tissue imaging depth; NIR laser as its excitation light source brings many advantages, such as relatively Deep light penetration depth, almost no damage to biological tissues, biological tissues will not emit...

Claims

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Application Information

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IPC IPC(8): C09K11/85
CPCC09K11/7773
Inventor 夏冬林朱昊李力周斌胡洋赵书文王友法
Owner WUHAN UNIV OF TECH
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