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Visible-light ultra-spectrum sensitized near-infrared-luminescence fluorescent powder and preparation method thereof

An ultra-broadband, phosphor technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of large absorption and emission reabsorption, poor stability, etc.

Active Publication Date: 2019-11-15
HUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of transition metal Cr 3+ with rare earth Er 3+ Ionic co-doped inorganic fluorescent powder materials to solve the problems of large reabsorption and poor stability between absorption and emission of fluorescent dyes in existing LSCs

Method used

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  • Visible-light ultra-spectrum sensitized near-infrared-luminescence fluorescent powder and preparation method thereof
  • Visible-light ultra-spectrum sensitized near-infrared-luminescence fluorescent powder and preparation method thereof
  • Visible-light ultra-spectrum sensitized near-infrared-luminescence fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Cr 3+ , Er 3+ Co-doped La 3 Ga 5.5 Nb 0.5 o 14 The preparation of inorganic fluorescent powder material comprises the following steps:

[0024] a) Weigh an appropriate amount of La respectively 2 o 3 , Ga 2 o 3 ,Nb 2 o 5 ,Cr 2 o 3 ,Er 2 o 3 , so that Er 2 o 3 The doping concentration of 0.07, Cr 2 o 3 The doping concentration is 0.005, and each component is accurately weighed according to the stoichiometric ratio.

[0025] b) Fully mix and grind the components in step a) in an agate mortar, first dry grind and mix evenly, and then add alcohol for wet grinding to improve mixing efficiency and particle size distribution uniformity.

[0026] c) Put the uniformly mixed powder in step b) into the muffle furnace, first pre-calcine at 950°C for 4 hours, then pre-calcine at 1200°C for 4 hours, and finally calcinate at 1300°C for 5 hours, and each pre-calcination is completed. Grind thoroughly.

[0027] Reference attached figure 1 , the fluorescent powder o...

Embodiment 2

[0029] Cr 3+ , Er 3+ Co-doped La 3 Ga 5.5 Nb 0.5 o 14 The preparation of inorganic fluorescent powder material comprises the following steps:

[0030] a) Weigh an appropriate amount of La respectively 2 o 3 , Ga 2 o 3 ,Nb 2 o 5 ,Cr 2 o 3 ,Er 2 o 3 , so that Er 2 o 3 The doping concentration of 0.01, Cr 2 o 3 The doping concentration is 0.005, and each component is accurately weighed according to the stoichiometric ratio.

[0031] b) Fully mix and grind the components in step a) in an agate mortar, first dry grind and mix evenly, and then add alcohol for wet grinding to improve mixing efficiency and particle size distribution uniformity.

[0032] c) Put the uniformly mixed powder in step b) into the muffle furnace, first pre-calcine at 950°C for 4 hours, then pre-calcine at 1200°C for 4 hours, and finally calcinate at 1300°C for 5 hours, and each pre-calcination is completed. Grind thoroughly.

[0033] The result of XRD testing of the obtained fluorescent p...

Embodiment 3

[0035] Cr 3+ , Er 3+ Co-doped La 3 Ga 5.5 Nb 0.5 o 14 The preparation of inorganic fluorescent powder material comprises the following steps:

[0036] a) Weigh an appropriate amount of La respectively 2 o 3 , Ga 2 o 3 ,Nb 2 o 5 ,Cr 2 o 3 ,Er 2 o 3 , so that Er 2 o 3 The doping concentration of 0.03, Cr 2 o 3 The doping concentration is 0.005, and each component is accurately weighed according to the stoichiometric ratio.

[0037] b) Fully mix and grind the components in step a) in an agate mortar, first dry grind and mix evenly, and then add alcohol for wet grinding to improve mixing efficiency and particle size distribution uniformity.

[0038] c) Put the uniformly mixed powder in step b) into the muffle furnace, first pre-calcine at 950°C for 4 hours, then pre-calcine at 1200°C for 4 hours, and finally calcinate at 1300°C for 5 hours, and each pre-calcination is completed. Grind thoroughly.

[0039] Gained fluorescent powder is similar to embodiment 1 th...

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Abstract

The invention discloses an inorganic fluorescent powder material co-doped with transition metal Cr<3+> and rare earth Er<3+> ions, and the chemical general formula of the inorganic fluorescent powdermaterial is La<3(1-x)>Er<3x>Ga<5.5(1-y)>Cr<5.5y>Nb<0.5>O<14>, wherein x is greater than 0 and less than or equal to 0.07, and y is equal to 0.005. The invention also provides a preparation method of the fluorescent powder. According to the invention, a high-temperature solid-phase method is used to synthesize a Cr<3+> and Er<3+> co-doped La3Ga5.5Nb0.5O14 inorganic fluorescent powder material; tests are carried out by instruments such as X-ray powder diffraction XRD, transient / steady state fluorescence spectrum FL and the like; and the result shows that the synthesized fluorescent powder has the fluorescent characteristics of almost covering full-wave band of visible light absorption and high-efficiency emission of near-infrared light of 1536 nm. Moreover, the doped matrix La3Ga5.5Nb0.5O14has excellent thermal stability and chemical stability, so that the novel transition metal wide-spectrum sensitized rare earth ion fluorescent powder can be suitable for high-efficiency stable fluorescent dyes in luminescent solar concentrators (LSC).

Description

technical field [0001] The invention relates to the technical field of fluorescent powder materials, in particular to a transition metal Cr synthesized by a high-temperature solid-phase method. 3+ with rare earth Er 3+ Ionic co-doped inorganic fluorescent powder material. Background technique [0002] With the development of human society, the demand for energy is increasing, and solar energy, as a green and renewable energy, has been more and more widely explored and utilized. Among them, the design and development of solar cells has always attracted the attention of researchers. The solar fluorescent concentrator (LSC) is a solar cell attached to both sides of a large-area transparent substrate. Fluorescent dye particles are evenly dispersed in the transparent substrate. The sunlight incident on the transparent substrate is converted into Light of a specific wavelength, this emitted light propagates through the substrate in the form of an optical waveguide until reachin...

Claims

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Application Information

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IPC IPC(8): C09K11/78
CPCC09K11/7769
Inventor 李雅洁赵振廷程利霞刘敏宋晋湘
Owner HUIZHOU UNIV
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