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Self-activation vanadate fluorescent powder, preparation method and applications thereof

A type of vanadate and phosphor technology, which is applied in the field of self-activating vanadate phosphor and its preparation, can solve problems such as low photoelectric conversion efficiency, and achieve the effects of high repeatability and simple synthesis method.

Inactive Publication Date: 2014-11-26
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, light-converting LEDs are a research hotspot, and phosphor materials in light-converting LEDs are essential; and the problem faced by solar cells is that the photoelectric conversion efficiency is low, and the solar energy can be effectively improved by adding a light conversion layer on its surface. Photoelectric conversion efficiency of the battery

Method used

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  • Self-activation vanadate fluorescent powder, preparation method and applications thereof
  • Self-activation vanadate fluorescent powder, preparation method and applications thereof
  • Self-activation vanadate fluorescent powder, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment prepares self-activated vanadate Na by sol-gel method 2 YMg 2 V 3 o 12 The sample preparation process is as follows:

[0033] 1) According to the reactant cation molar ratio Na + :Y 3+ :Mg 2+ = 2:1:2 Weigh the raw material Na respectively 2 CO3 (AR)0.2120g, Y(NO 3 ) 3 ·6H 2 O0.7660g, Mg(NO 3 ) 2 ·6H 2 O(AR) 1.0256g, add distilled water and stir to obtain solution A;

[0034] Weigh citric acid 4.2028g and NH 4 VO 3 (AR) 0.7019g, slowly add solution A, stir while adding, until complete reaction, obtain uniform solution A;

[0035] 2) Put the solution into an oven and keep it warm at 60°C for 72 hours to form a uniform transparent colloid, then raise the temperature to 120°C and keep it warm for 12 hours to obtain a brown precursor;

[0036] 3) Fully grind the precursor, pre-calcine at 500°C for 4 hours to obtain a fluffy gray starting material, fully grind the starting material and calcinate at 700°C for 5 hours, cool and grind to obtain a ...

Embodiment 2

[0039] This embodiment prepares self-activated vanadate Na by sol-gel method 2 Y 0.95 Eu 0.05 Mg 2 V 3 o 12 The sample preparation process is as follows:

[0040] 1) According to the reactant cation molar ratio Na + :Y 3+ :Mg 2+ =2:0.95:2 Weigh the raw material Na respectively 2 CO 3 (AR)0.2120g, Y(NO 3 ) 3 ·6H 2 O0.7277g, Mg(NO 3 ) 2 ·6H 2 O(AR) 1.0256g, measure 0.02mol / L of Eu(NO 3 ) 3 Solution 5mL was mixed and stirred to obtain solution A;

[0041] Weigh citric acid 4.2028g and NH 4 VO 3 (AR) 0.7019g, slowly add solution A, stir while adding, until complete reaction, obtain uniform solution B;

[0042] 2) Put solution B in an oven and keep it warm at 70°C for 48 hours to form a uniform transparent colloid, then raise the temperature to 110°C and keep it warm for 36 hours to obtain a brown precursor;

[0043] 3) Fully grind the precursor, pre-calcine at 500°C for 5 hours to obtain a fluffy gray starting material, fully grind the starting material, calci...

Embodiment 3

[0046] This embodiment prepares self-activated vanadate Na by sol-gel method 2 Y 0.9 Eu 0.1 Mg 2 V 3 o 12 The sample preparation process is as follows:

[0047] 1) According to the reactant cation molar ratio Na + :Y 3+ :Mg 2+ =2:0.9:2 Weigh the raw material Na respectively 2 CO 3 (AR)0.2120g, Y(NO 3 ) 3 ·6H 2 O0.6894g, Mg(NO 3 ) 2 ·6H 2 O(AR) 1.0256g, measure 0.02mol / L of Eu(NO 3 ) 3 Solution 10mL was mixed and stirred to obtain solution A;

[0048] Weigh citric acid 4.2028g and NH 4 VO 3 (AR) 0.7019g, slowly add solution A, stir while adding, until complete reaction, obtain uniform solution B;

[0049] 2) Put solution B in an oven and keep it warm at 70°C for 48 hours to form a uniform transparent colloid, then raise the temperature to 110°C and keep it warm for 36 hours to obtain a brown precursor;

[0050] 3) Fully grind the precursor, pre-calcine at 500°C for 5 hours to obtain a fluffy gray starting material, fully grind the starting material, calcina...

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PUM

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Abstract

The invention provides a self-activation vanadate fluorescent powder, a preparation method, and applications thereof. The chemical formula of the self-activation vanadate fluorescent powder is A2BMg2V3O12, wherein the A represents Li, Na, or K, and the B represents Y, Gd, Bi, La, or Lu. The self-activation vanadate fluorescent powder is synthesized through a sol-gel method, and can be activated by ultraviolet lights with a wave length of 200 to 400 nm. The emission spectrum of the fluorescent powder covers a wide range of 350 to 700 nm, and the main peak is at 500 nm. The light emission of the self-activation vanadate fluorescent powder can be adjusted by doping rare earth ions such as Eu3+, Sm3+, Yb3+, Pr3+, Nd3+, and the like. The fluorescent powder can be applied to the fields of LED and solar cells.

Description

technical field [0001] The invention belongs to the technical field of solid-state luminescence in physics, and specifically relates to a self-activated vanadate phosphor and a preparation method thereof, and also relates to the application of the phosphor in white light LEDs and improving the photoelectric conversion efficiency of silicon-based solar cells . Background technique [0002] With the increasingly severe energy crisis and environmental pollution, more and more attention has been paid to the development of new green energy production devices and environmentally friendly new lighting sources. As a new generation of energy-saving and efficient lighting sources, LEDs and solar cells with green production capacity are one of the important ways to solve this problem. At present, light-converting LEDs are a research hotspot, and phosphor materials in light-converting LEDs are essential; and the problem faced by solar cells is that the photoelectric conversion efficien...

Claims

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Application Information

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IPC IPC(8): C09K11/82C09K11/74H01L33/50H01L31/055
CPCY02E10/52
Inventor 郭崇峰宋丹
Owner NORTHWEST UNIV
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