Eu<3+> ion-activated fluorescent material and preparation and application thereof

A technology of fluorescent materials and ions, applied in the direction of luminescent materials, chemical instruments and methods, electrical components, etc., can solve problems such as insufficient red light emission, high correlated color temperature color rendering index, limitations, etc., and achieve excellent luminous performance and good luminous efficiency , the effect of strong excitation efficiency

Active Publication Date: 2018-11-30
ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today's mainstream commercial white LED lighting devices are composed of InGaN blue light semiconductor chips and yellow Y 3 Al 5 o 12 : Ce 3+ (YAG:Ce 3+ ) combined application of phosphor powder, however, this lighting device has insufficient red light emission in the visible light region, so it has disadvantages such as high correlated color temperature (CCT>4500K) and poor color rendering index (Ra<80), which are very To a large extent, it limits its application in the field of lighting

Method used

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  • Eu&lt;3+&gt; ion-activated fluorescent material and preparation and application thereof
  • Eu&lt;3+&gt; ion-activated fluorescent material and preparation and application thereof
  • Eu&lt;3+&gt; ion-activated fluorescent material and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides a Eu 3+ Ion-activated phosphor with the chemical formula LaGd 0.55 Eu 0.45 YO 4 Cl 5 . According to the stoichiometric ratio of each cationic element in the chemical formula, weigh lanthanum chloride LaCl 3 : 2.45 g, gadolinium chloride GdCl 3 : 2.636 g, europium oxide Eu 2 o 3 : 0.792 g, yttrium chloride YCl 3 : 1.95 g, Titanium Dioxide TiO 2 : 0.8 g. The above Eu was prepared as follows 3+ Ion Activated Phosphors:

[0036] The weighed raw materials were wet-milled with acetone as a grinding aid, dried, and then the resulting mixture was pressed into blocks. Calcining the obtained briquette in an air atmosphere, the calcination temperature is 1250°C, and the calcination time is 6 hours, to obtain Eu 3+ Ion activated phosphor LaGd 0.55 Eu 0.45 YO 4 Cl 5 .

[0037] figure 1 is the X-ray powder diffraction pattern of the above product, and the XRD test result shows that the prepared material is a single-phase material without im...

Embodiment 2

[0043] This embodiment provides a Eu 3+ Ion-activated phosphor with the chemical formula LaGd 0.999 Eu 0.001 YO 4 Cl 5 . According to the stoichiometric ratio of each cationic element in the chemical formula, weigh lanthanum chloride LaCl 3 : 7.35 g, gadolinium oxide Gd 2 o 3 : 5.437 grams, europium nitrate Eu (NO 3 ) 3 ·6H 2 O: 0.0134 g, yttrium chloride YCl 3 : 5.85 g, Titanium Dioxide TiO 2 : 2.401 g. The above Eu was prepared as follows 3+ Ion Activated Phosphors:

[0044] The weighed raw materials were wet-milled in an agate mortar with acetone as a grinding aid, dried, and the obtained mixture was pressed into blocks. Calcining the obtained briquette in an air atmosphere, the calcination temperature is 1350°C, and the calcination time is 4 hours, to obtain Eu 3+ Ion activated phosphor LaGd 0.999 Eu 0.001 YO 4 Cl 5 . Its main structural properties, excitation spectrum, and luminescence spectrum are similar to those of Example 1.

Embodiment 3

[0046] This embodiment provides a Eu 3+ Ion-activated phosphor with the chemical formula LaEuYTiO 4 Cl 5 . According to the stoichiometric ratio of each cationic element in the chemical formula, weigh lanthanum chloride LaCl 3 : 4.9 g, europium oxide Eu 2 o 3 : 3.52 g, yttrium chloride YCl 3 : 3.9 g, Titanium Dioxide TiO 2 : 1.6g. The above Eu was prepared as follows 3+ Ion Activated Phosphors:

[0047] The weighed raw materials were wet-milled with acetone as a grinding aid, dried, and the obtained mixture was pressed into blocks. Calcining the obtained briquette in an air atmosphere, the calcination temperature is 1400°C, and the calcination time is 1 hour, to obtain Eu 3+ Ion activated phosphor LaEuYTiO 4 Cl 5 . Its main structural properties, excitation spectrum, and luminescence spectrum are similar to those of Example 1.

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Abstract

The invention relates to an Eu<3+> ion-activated fluorescent material. The material has a chemical formula of LaGd(1-x)EuxYTiO4Cl5, wherein 0.001 <= x <= 1.0, and red fluorescence can be emitted by the Eu<3+> ion-activated fluorescent material under excitation of ultraviolet light and / or near ultraviolet light. Red phosphor of a pure phase and with excellent luminescence performance can be obtained by adopting a high-temperature solid-phase method, and has strong excitation efficiency under excitation of ultraviolet and near-ultraviolet light, the excited wavelengths are very consistent with emission wavelength of a near-ultraviolet LED chip, and the emitted light has a sharp spectrum dominated by red light of 615 nm.

Description

technical field [0001] The invention relates to the field of inorganic light-emitting devices, in particular to a Eu 3+ Ion-activated fluorescent materials and their preparation and applications. Background technique [0002] In the research and development of lighting materials, phosphors activated by rare earth ions play an important role in the field of lighting and display, and are essential basic materials; especially in recent years, phosphors activated by rare earth ions have Solid-state lighting products based on white light-emitting diodes play an important role. [0003] Compared with traditional fluorescent lamps and other light sources, white light-emitting diode lighting, a rapidly developing new generation of lighting sources, has many advantages of environmental protection, low power consumption, safety and high brightness. Today's mainstream commercial white LED lighting devices are composed of InGaN blue light semiconductor chips and yellow Y 3 Al 5 o 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/86H01L33/50
CPCC09K11/7791H01L33/502
Inventor 黄彦林刘宣宣秦杰米龙庆魏东磊
Owner ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV
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