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Dy3+-doped borate fluorescent powder material as well as preparation method and application thereof

A phosphor and borate technology, applied in luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of low efficiency, low overall efficiency, restricting the development of wLED devices, etc., to reduce the amount of light, improve efficiency, high heat Effects of stability and chemical stability

Pending Publication Date: 2020-11-03
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while these UV-LEDs can produce high-quality white light, their overall efficiency tends to be low due to the reabsorption of blue light by the red and green phosphors
At the same time, the traditional packaging method of wLED devices has a very low efficiency (only 30-50%) due to the reflection of the incident light source and the emitted light to the internal chip.
These shortcomings and deficiencies limit the development of wLED devices

Method used

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  • Dy3+-doped borate fluorescent powder material as well as preparation method and application thereof
  • Dy3+-doped borate fluorescent powder material as well as preparation method and application thereof
  • Dy3+-doped borate fluorescent powder material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] a Dy 3+ Doped borate white phosphor material (Dy 3+ The doping molar amount is 12%), including the following steps:

[0044] 1) According to the chemical formula of the target product Ca 3 La 2.88 Dy 0.12 (BO 3 ) 5 stoichiometric ratio, weigh the following raw materials: 1.3636g (1.3624×10 -2 mol)CaCO 3 , 1.4041g (2.2707×10 -2 mol)H 3 BO 3 , 2.1306g (0.6540×10 - 2 mol)La 2 O 3 and 0.1016g (0.0272×10 -2 mol)Dy 2 O 3 ;

[0045] 2) Add an additional 3 mol% (H 3 BO 3 3% of the molar amount) of H 3 BO 3 (to compensate B 2 O 3 volatilization), grind in an agate mortar until the raw materials are uniformly dispersed, then preheat the mixture in the air at about 700°C in a muffle furnace for 2 hours, and cool it to room temperature to obtain a premix;

[0046] 3) regrinding the obtained premix, and then in a reducing atmosphere (H 2 and N 2 The volume ratio of 5:95) was calcined at 1110 °C for 10 h to obtain the target phosphor sample Ca. 3 La 2.88 D...

Embodiment 2

[0048] a Dy 3+ Doped borate white phosphor material (Dy 3+ The doping molar amount is 3%), including the following steps:

[0049] 1) According to the chemical formula of the target product Ca 3 La 2.97 Dy 0.03 (BO 3 ) 5 stoichiometric ratio, weigh the following raw materials: 1.3663g (1.3651×10 -2 mol)CaCO 3 , 1.4068g (2.2751×10 -2 mol)H 3 BO 3 , 2.2014g (0.6757×10 - 2 mol)La 2 O 3 and 0.0255g (0.0068×10 -2 mol)Dy 2 O 3 .

[0050] 2) Grind the above-mentioned raw materials in an agate mortar until the raw materials are uniformly dispersed, then preheat the mixture in air at about 700°C in a muffle furnace for 2 hours, and cool it to room temperature to obtain a premix;

[0051] 3) After cooling, regrind the sample, and finally in a reducing atmosphere (volume fraction of 5% H 2 and a volume fraction of 95% N 2 ) and calcined at 1110 °C for 10 h to obtain the target phosphor sample Ca. 3 La 2.97 Dy 0.03 (BO 3 ) 5 .

Embodiment 3

[0053] a Dy 3+ Doped borate white phosphor material (Dy 3+ The doping molar amount is 6%), including the following steps:

[0054] The preparation method of this example is roughly the same as that of Example 1, the difference is: Dy 3+ The doping amount is 6%, that is, the raw material is adjusted to 1.3654g (1.3642×10 -2 mol)CaCO 3 , 1.4059g (2.2737×10 -2 mol)H 3 BO 3 , 2.1778g (0.6685×10 -2 mol)La 2 O 3 and 0.0509g (0.0136×10 -2 mol)Dy 2 O 3 ; The obtained target phosphor is Ca 3 La 2.94 Dy 0.06 (BO 3 ) 5 .

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Abstract

The chemical formula of the Dy3+ doped borate fluorescent powder is Ca3La3(1-x)(BO3)5:3xDy3+, and 0.03 < = 3x < = 0.15; wherein doping modification of Ca3La3(1-x)(BO3)5:3xDy3+ is realized by a high-temperature solid-phase method. The inorganic fluorescent powder material disclosed by the invention has excellent thermal stability and white light emitting performance, and has a potential applicationvalue in pcwLEDs excited by ultraviolet rays; aiming at the problems of limited luminous efficiency and the like of an existing wLED device, the invention further provides a packaging method of the CLBD fluorescent powder, the amount of light reflected back to a chip is effectively reduced, so that the efficiency of the wLED device is effectively improved, and certain new ideas are provided for development of novel fluorescent powder of pc-wLEDs.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a Dy 3+ Doped borate phosphor material, preparation method and application thereof. Background technique [0002] In recent years, excessive energy consumption has become a crucial global problem, promoting the development of energy-saving technologies such as energy materials (luminescent materials) and solid-state lighting (SSL). Electricity currently used for lighting reaches 22% of the total electricity, and SSL can cut energy consumption in half. SSL includes various solid-state light sources. Among them, Phosphor-converted white light emitting diodes (pc-wLEDs) have higher luminous efficiency, lower power consumption and longer service life than traditional incandescent lamps or fluorescent lamps. and environmental friendliness. Continuous improvement of these wLED devices requires not only advancements in LED chips but, more importantly, the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/778H01L33/502Y02B20/00
Inventor 戴武斌樊烨明黄珂徐慢
Owner WUHAN INSTITUTE OF TECHNOLOGY