Erbium ion sensitized upconversion phosphor as well as preparation method and application thereof

A technology of erbium ion and phosphor powder, applied in the field of erbium ion sensitized up-conversion phosphor and its preparation, can solve the problems of insufficient intensity and impure luminescence, and achieve easy operation, no environmental pollution, and reduce the occurrence of concentration quenching The effect of chance

Active Publication Date: 2019-02-15
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The up-conversion phosphor uses dual energy trapping centers to obtain high-intensity, single-red emission characteristics, which can solve the problem of impure and insufficient luminescence of existing up-conversion materials

Method used

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  • Erbium ion sensitized upconversion phosphor as well as preparation method and application thereof
  • Erbium ion sensitized upconversion phosphor as well as preparation method and application thereof
  • Erbium ion sensitized upconversion phosphor as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment provides an erbium ion-sensitized up-conversion phosphor and a preparation method thereof.

[0042] Dilute 1.5mL to a concentration of 2mol·L -1 citric acid solution, 1.25mL concentration is 4mol L -1 Mix sodium hydroxide solution and 10mL deionized water, stir for 10 minutes, then add 0.5mL of -1 Lutetium nitrate solution, 0.485mL concentration is 1mol L -1 Erbium nitrate solution, 0.05mL concentration is 0.1mol L -1 The concentration of holmium nitrate solution and 0.1mL is 0.1mol·L -1thulium nitrate solution, stirred for 30 minutes, then added 10mL concentration of 1mol L -1 Sodium fluoride solution and 6mL deionized water were stirred for 30 minutes to form a milky white cloudy solution. Transfer the turbid solution to the white liner of the stainless steel reaction kettle, seal it and place it in an oven for hydrothermal reaction at 200°C for 10 hours. The cloudy solution after the reaction was centrifuged twice at 10,000 rpm for 10 minutes ea...

Embodiment 2

[0045] This embodiment provides an erbium ion-sensitized up-conversion phosphor and a preparation method thereof.

[0046] Dilute 1.5mL to a concentration of 2mol·L -1 citric acid solution, 1.25mL concentration is 4mol L -1 Mix sodium hydroxide solution and 10mL deionized water, stir for 10 minutes, then add 0.5mL of -1 Lutetium nitrate solution, 0.475mL concentration is 1mol L -1 Erbium nitrate solution, 0.05mL concentration is 0.1mol L -1 The concentration of holmium nitrate solution and 0.2mL is 0.1mol·L -1 thulium nitrate solution, stirred for 30 minutes, then added 10mL concentration of 1mol L -1 Sodium fluoride solution and 6mL deionized water were stirred for 30 minutes to form a milky white cloudy solution. Transfer the turbid solution to the white liner of the stainless steel reaction kettle, seal it and place it in an oven for hydrothermal reaction at 200°C for 10 hours. The cloudy solution after the reaction was centrifuged twice at 10,000 rpm for 10 minutes e...

Embodiment 3

[0049] This embodiment provides an erbium ion-sensitized up-conversion phosphor and a preparation method thereof.

[0050] Dilute 1.5mL to a concentration of 2mol·L -1 citric acid solution, 1.25mL concentration is 4mol L -1 Mix sodium hydroxide solution and 10mL deionized water, stir for 10 minutes, then add 0.5mL of -1 Lutetium nitrate solution, 0.445mL concentration is 1mol L -1 Erbium nitrate solution, 0.05mL concentration is 0.1mol L -1 The concentration of holmium nitrate solution and 0.5mL is 0.1mol L -1 thulium nitrate solution, stirred for 30 minutes, then added 10mL concentration of 1mol L -1 Sodium fluoride solution and 6mL deionized water were stirred for 30 minutes to form a milky white cloudy solution. Transfer the turbid solution to the white liner of the stainless steel reaction kettle, seal it and place it in an oven for hydrothermal reaction at 200°C for 10 hours. The cloudy solution after the reaction was centrifuged twice at 10,000 rpm for 10 minutes e...

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Abstract

The invention belongs to the technical field of luminescent materials and particularly relates to erbium ion sensitized upconversion phosphor as well as a preparation method and an application thereof. According to the upconversion phosphor, NaLuF4 is taken as a substrate, Tm<3+> and Ho<3+> are taken as energy trapping centers, and Er<3+> is taken as sensitization ions and activation ions. Er<3+>is taken as the sensitization ions and the activation ions simultaneously in a high Er<3+> doping manner, and red upconversion luminescence with high impurity can be obtained. Doping concentration ofEr<3+> can be reduced by adopting Tm<3+> and Ho<3+> as the energy trapping centers simultaneously, so that the probability of concentration quenching is reduced effectively, and red upconversion luminescence with high purity, high intensity and high red-green ratio is realized more easily. The preparation process of the upconversion phosphor is simple, short in period, easy to operate, pollution-free and suitable for large-scale production, and equipment cost is low. The obtained upconversion phosphor has broad application prospect in the fields of bioimaging, solar cells, solid lasers, devicedisplay and the like.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to an erbium ion-sensitized up-conversion fluorescent powder and a preparation method and application thereof. Background technique [0002] Up-conversion luminescence refers to the luminescence phenomenon in which the emitted light wavelength is smaller than the excitation light wavelength, and it is mainly rare earth doped compounds at present. Rare earth-doped upconversion luminescent materials have the advantages of long fluorescence lifetime, low biological toxicity, high chemical stability, and strong photostability, and have broad application prospects in solid-state lasers, solar cells, and biological imaging. Especially in the field of biological imaging, at present, 980nm excitation light, which can penetrate deeply and reduce tissue damage, is mainly used to excite up-conversion fluorescent materials. However, under this excitation light, up-con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85
CPCC09K11/7705
Inventor 林浩张曰理
Owner GUANGZHOU UNIVERSITY
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