Ho<3+>/Yb<3+>/Gd<3+> co-doped zinc oxide up-conversion luminescent material and preparation method thereof

A luminescent material and co-doping technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of inability to do high concentration, complex preparation process, low luminous intensity, etc., and achieve environmental friendliness, simple synthesis process, and luminescence strong effect

Active Publication Date: 2017-03-15
CHANGAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a Ho 3+ / Yb 3+ / Gd 3+ Co-doped zinc oxide up-conversion luminescent material and its preparation method solve the technical problems of complex preparation process of zinc oxide up-conversion luminescent material in the prior art, low luminous intensity, and inability to perform high-concentration doping

Method used

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  • Ho&lt;3+&gt;/Yb&lt;3+&gt;/Gd&lt;3+&gt; co-doped zinc oxide up-conversion luminescent material and preparation method thereof
  • Ho&lt;3+&gt;/Yb&lt;3+&gt;/Gd&lt;3+&gt; co-doped zinc oxide up-conversion luminescent material and preparation method thereof
  • Ho&lt;3+&gt;/Yb&lt;3+&gt;/Gd&lt;3+&gt; co-doped zinc oxide up-conversion luminescent material and preparation method thereof

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Embodiment 1

[0026] To achieve the above object, the present invention provides a Ho 3+ / Yb 3+ / Gd 3+ Co-doped ZnO up-conversion luminescent material, the chemical composition is: Zn 1-x-y-z Ho x Yb y Gd z O, where Ho 3+ is the active ion, Yb 3+ is the sensitizer, x is Ho 3+ Mole percentage of doping, y is Yb 3+ Mole percent of doping, z is Gd 3+ The molar percentage of doping, and x+y+z=9mol%, promptly x=1mol%, y=5mol%, z=3mol%, preparation steps are as follows:

[0027] Step 1, prepare zinc acetate solution, get the Zn(Ac) of 6.585g 2 , dissolved in 30ml of deionized water, stirred until it was fully dissolved into a colorless and transparent solution ①.

[0028] Step 2, preparing rare earth nitrates. Weigh the corresponding rare earth oxide Ho in proportion Zn:Ho:Yb:Gd=0.91:0.01:0.05:0.03 2 o 3 , Yb 2 o 3 and Gd 2 o 3 , mix evenly, dissolve in dilute nitric acid solution, heat and stir at 40°C-60°C, and evaporate the solution to dryness at 50°C-70°C after fully reactin...

Embodiment 2

[0035] In this embodiment, Ho 3+ / Yb 3+ / Gd 3+ The chemical composition and preparation method of the co-doped ZnO up-conversion luminescent material are the same as in Example 1, except that x+y+z=6mol%, z=0.

Embodiment 3

[0037] In this embodiment, Ho 3+ / Yb 3+ / Gd 3+ The chemical composition and preparation method of the co-doped ZnO up-conversion luminescent material are the same as in Example 1, except that x+y+z=7mol%, z=1mol%.

[0038] Carry out X-ray powder diffraction pattern analysis, SEM picture and the up-conversion emission spectrum that the sample obtains under 980nmLD excitation to the sample that above embodiment makes and analyze, and the result is as follows:

[0039] figure 1 It is Example 1 sample Zn 0.91 Ho 0.01 Yb 0.05 Gd 0.03 X-ray powder diffraction pattern of O. It can be seen that the main crystal phase is ZnO, and individual Yb 2 o 3 peak. Table 1 lists the lattice constants of rare earth doped ZnO and pure ZnO. It is obvious from the data in the table that with the doping of rare earth ions, the lattice constant becomes larger, which may be caused by the partial entry of rare earth ions into the lattice of ZnO and replacement of Zn atoms.

[0040] Table 1 Com...

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Abstract

The invention provides a Ho<3+> / Yb<3+> / Gd<3+> co-doped zinc oxide up-conversion luminescent material and a preparation method thereof. The luminescent material comprises ZnO as a base and rare earth elements of Ho<3+>, Yb<3+> and Gd<3+> as doping ions and has a chemical formula of Zn1-x-y-xHoxYbyGdzO. The Ho<3+> / Yb<3+> / Gd<3+> co-doped zinc oxide up-conversion luminescent material has high luminescent intensity. The preparation method has simple synthesis processes and high reproducibility, utilizes environmentally friendly materials having safety and no toxicity and is easy to be industrialized. Through change of a doping concentration of Gd<3+>, the up-conversion luminescent intensity of zinc oxide can be improved obviously. The Ho<3+> / Yb<3+> / Gd<3+> co-doped zinc oxide up-conversion luminescent material has high luminescent intensity and can be used for display, illumination and laser-based counterfeiting prevention.

Description

technical field [0001] The invention belongs to the technical field of up-conversion luminescent materials, and relates to an up-conversion luminescent material doped with a rare earth element zinc oxide material. Background technique [0002] In recent years, rare-earth-doped upconversion luminescent materials have attracted great attention due to their wide application in 3D stereoscopic display, laser anti-counterfeiting, bioluminescence labeling and short-wavelength lasers. But generally speaking, the up-conversion luminous efficiency is still relatively low. At present, some commonly used materials with better luminescent properties still have some problems in terms of thermal and chemical stability, mechanical strength, etc., which brings difficulties to practical applications. Therefore, finding new host materials with high conversion efficiency and excellent physical and chemical properties has become one of the current research hotspots of upconversion luminescent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/54
CPCC09K11/7769
Inventor 于晓晨张丹丹李哲张朝光段理蒋自强赵鹏
Owner CHANGAN UNIV
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