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A dual-ion-sensitized up-conversion phosphor and its preparation method and application

A dual-ion, phosphor technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of insufficient intensity and impure luminescence, and achieve the effects of easy operation, no environmental pollution, and low equipment cost.

Active Publication Date: 2021-08-31
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The up-conversion phosphor can emit high-intensity red light by utilizing energy-trapping centers and dual-ion sensitization, which can solve the problems of existing up-conversion materials with multiple emission peaks, impure luminescence and insufficient intensity.

Method used

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  • A dual-ion-sensitized up-conversion phosphor and its preparation method and application
  • A dual-ion-sensitized up-conversion phosphor and its preparation method and application
  • A dual-ion-sensitized up-conversion phosphor and its preparation method and application

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Embodiment 1

[0041] This embodiment provides a dual 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 Sodium hydroxide solution and 10mL deionized water were mixed, stirred for 10 minutes, and 0.4mL was added successively with a concentration of 1mol L -1 Lutetium nitrate solution, 0.2mL concentration is 0.5mol L -1 ytterbium nitrate solution, 0.495mL concentration is 1mol L -1 of erbium nitrate solution and 0.05mL with a concentration of 0.1mol L -1 Holmium 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 rea...

Embodiment 2

[0045] This embodiment provides a dual 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 Sodium hydroxide solution and 10mL deionized water were mixed, stirred for 10 minutes, and 0.4mL was added successively with a concentration of 1mol L -1 Lutetium nitrate solution, 0.2mL concentration is 0.5mol L -1 ytterbium nitrate solution, 0.49mL concentration is 1mol L -1 The concentration of erbium nitrate solution and 0.1mL is 0.1mol·L -1 Holmium 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...

Embodiment 3

[0049] This embodiment provides a dual 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 Sodium hydroxide solution and 10mL deionized water were mixed, stirred for 10 minutes, and 0.4mL was added successively with a concentration of 1mol L -1 Lutetium nitrate solution, 0.2mL concentration is 0.5mol L -1 ytterbium nitrate solution, 0.48mL concentration is 1mol L -1 of erbium nitrate solution and 0.2mL with a concentration of 0.1mol L -1 Holmium 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 react...

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Abstract

The invention belongs to the technical field of luminescent materials, and in particular relates to a dual-ion-sensitized up-conversion fluorescent powder and a preparation method and application thereof. The up-converting phosphor is NaLuF 4 is the matrix, Ho 3+ As the energy trapping center, Yb 3+ and Er 3+ Simultaneously as a sensitizing ion and Er 3+ As an active ion, high-intensity red upconversion luminescence can be obtained. Among them, through high doping Er 3+ , low doped Yb 3+ way, the Yb 3+ and Er 3+ At the same time, as a sensitizing ion, it can effectively reduce the probability of concentration quenching, so that it is easier to achieve high-purity, high-intensity red up-conversion luminescence. to Ho 3+ As an energy capture center, Er can be greatly improved 3+ The 660nm red up-conversion luminous intensity. The preparation process of the up-conversion phosphor is simple, the cycle is short, the equipment cost is low, easy to operate, no pollution, and suitable for large-scale production. The obtained up-conversion phosphor has broad application prospects in the fields of biological imaging, solar cells, solid-state lasers, device displays and the like.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a dual-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-conver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/85
CPCC09K11/7773
Inventor 林浩张曰理
Owner GUANGZHOU UNIVERSITY