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Erbium-chromium-codoped zinc gallate stannate near infrared long-afterglow material and preparation method thereof

A technology of zinc gallium stannate and external length, applied in the field of near-infrared long afterglow luminescent materials, to achieve the effect of increased release speed, fast release speed, and long-term near-infrared long afterglow luminescence

Inactive Publication Date: 2017-07-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on improving the afterglow performance by co-doping other ions that have energy transfer with chromium ions is very limited.

Method used

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  • Erbium-chromium-codoped zinc gallate stannate near infrared long-afterglow material and preparation method thereof
  • Erbium-chromium-codoped zinc gallate stannate near infrared long-afterglow material and preparation method thereof
  • Erbium-chromium-codoped zinc gallate stannate near infrared long-afterglow material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to the following composition: near-infrared long afterglow luminescent material ZnGa2O4: Cr, Er, with ZnGa2O4 as the base, doped ion Cr3+ as active ion, doped ion Er3+ as energy transfer ion, in which the doping amount of Cr3+ ion is 1%, Er3+ The doping amount of ions is 0.5%. Weigh zinc oxide, gallium oxide, chromium oxide, and erbium oxide respectively, grind and mix them, pre-fire at 800°C for 3 hours, take them out, grind again, and fire at 1450°C for 5 hours.

[0029] The phosphorescence spectrum of the near-infrared long-lasting luminescent material prepared in this example is as follows: figure 1 As shown, the emission spectrum under 300nm excitation emits phosphorescence at 650-800nm, and the emission peak is located at 695nm. figure 2 The excitation spectrum corresponding to the luminescence peak shown in , the three excitation peaks obtained are located at 300nm, 410nm and 550nm respectively, which proves that the luminescence center is chromium ion...

Embodiment 2

[0031] According to the following composition: near-infrared long afterglow luminescent material Zn 1.2 Ga 1.6 sn 0.2 o 4 : Cr3+, Er3+, with ZnGa2O4 as the substrate, the doped ion Cr3+ as the active ion, and the doped ion Er3+ as the energy transfer ion, wherein the doping amount of Cr3+ ions is 1%, and the doping amount of Er3+ ions is 0.5%; Take zinc oxide, gallium oxide, chromium oxide, and erbium oxide, grind and mix them, pre-fire at 900°C for 3 hours, take out, grind again, and burn at 1350°C for 8 hours.

[0032] The phosphorescence spectrum of the near-infrared long-lasting luminescent material prepared in this example is as follows: Figure 5 As shown, the emission spectrum under 300nm excitation emits phosphorescence at 650-800nm, and the emission peak is located at 695nm. Figure 6 The excitation spectrum corresponding to the luminescence peak shown in , the three excitation peaks obtained are located at 300nm, 410nm and 550nm respectively, which proves that th...

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Abstract

The invention discloses an erbium-chromium-codoped zinc gallate stannate near infrared long-afterglow material and a preparation method thereof. The structural formula of the material is Zn1+xGa2-2xSnxO4:nCr, mEr, wherein 0<x<0.4, 0.002<n<0.05, and 0.005<m<0.02. The near infrared long-afterglow material has the advantages that the material emits 650-800nm-waveband near infrared long afterglow, the emission peak is located at 695nm, and the material has higher afterglow intensity and longer afterglow time as compared with those of a chromium-doped near infrared long-afterglow material.

Description

technical field [0001] The invention relates to a near-infrared long afterglow luminescent material, in particular to an erbium-chromium co-doped zinc gallium stannate near-infrared long afterglow material and a preparation method thereof. Background technique [0002] Long afterglow luminescent materials are also called light storage materials, or luminous materials, which refer to the energy that can store the energy of external light irradiation under natural light or other artificial light sources, and then slowly emit visible light at a certain temperature (referring to room temperature). Release these stored energy in the form of photoluminescent materials. In the actual production at this stage, on the one hand, the chemical stability and luminescence of the blue and green long-lasting luminescent materials basically meet the practical needs. On the other hand, compared with the long-lasting luminescence in the visible light range, the research on near-infrared (700-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
CPCC09K11/7708
Inventor 李宇孙彦斌
Owner JILIN UNIV
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