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Preparation method of CaSi2O2N2:Ce,Tb/Eu multi-layer and multi-color fluorescent fiber film

A fluorescent fiber and fiber membrane technology, applied in chemical instruments and methods, luminescent materials, heating/cooling fabrics, etc., can solve problems such as the decline of emission light efficiency, and achieve the effect of reducing secondary absorption and improving luminous efficiency.

Inactive Publication Date: 2015-02-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, there is secondary absorption of emitted light between various fluorescent materials, which will lead to a decrease in the efficiency of emitted light

Method used

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  • Preparation method of CaSi2O2N2:Ce,Tb/Eu multi-layer and multi-color fluorescent fiber film
  • Preparation method of CaSi2O2N2:Ce,Tb/Eu multi-layer and multi-color fluorescent fiber film
  • Preparation method of CaSi2O2N2:Ce,Tb/Eu multi-layer and multi-color fluorescent fiber film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix 1mL of ultrapure water and 18mL of absolute ethanol; dissolve 0.009g of cerium nitrate, 0.012g of terbium nitrate, and 0.397g of calcium nitrate in the mixed solvent, and then add 0.71mL of TEOS. After continuing to stir for 30min, slowly add 0.9g PVP (molecular weight 1300000) and 2.4g PVP (molecular weight 50000) under high-speed stirring, and continue stirring for 6h until the solution is clear and transparent to obtain spinning solution A; 0.019g europium nitrate, 0.402g Calcium nitrate was dissolved in the mixed solvent, and 0.69mL TEOS was added. After stirring continuously for 30 min, slowly add 0.9 g PVP (molecular weight 1300000) and 2.4 g PVP (molecular weight 50000) under high-speed stirring, and continue stirring for 6 h until the solution is clear and transparent to obtain spinning solution B.

[0031] The obtained precursor solution was electrospun: at room temperature, the humidity was controlled at 30%, the spinning voltage was set to 6kv, the propul...

Embodiment 2

[0035] Mix 1.5mL of ultrapure water and 18mL of absolute ethanol; dissolve 0.019g of cerium nitrate, 0.022g of terbium nitrate, and 0.697g of calcium nitrate in the mixed solvent, and then add 1.02mL of TEOS. After continuing to stir for 30min, slowly add 1g PVP (molecular weight 1300000) and 2g PVP (molecular weight 50000) under high-speed stirring, and continue stirring for 6h until the solution is clear and transparent to obtain spinning solution A; 0.03g europium nitrate, 0.613g calcium nitrate Dissolve in the mixed solvent, then add 0.98mL TEOS. After stirring continuously for 30 min, slowly add 0.9 g PVP (molecular weight 1300000) and 2.4 g PVP (molecular weight 50000) under high-speed stirring, and continue stirring for 6 h until the solution is clear and transparent to obtain spinning solution B.

[0036]The obtained precursor solution was subjected to electrospinning: at room temperature, the humidity was controlled at 30%, the spinning voltage was set to 8kv, the pro...

Embodiment 3

[0040] Mix 2mL of ultrapure water and 18mL of absolute ethanol; dissolve 0.015g of cerium nitrate, 0.032g of terbium nitrate, and 0.96g of calcium nitrate in the mixed solvent, and then add 1.48mL of TEOS. After stirring continuously for 30 minutes, slowly add 1.2g PVP (molecular weight 1300000) and 1.7g PVP (molecular weight 50000) under high-speed stirring, and continue stirring for 6 hours until the solution is clear and transparent to obtain spinning solution A; 0.05g europium nitrate, 1.102g nitric acid Calcium was dissolved in the mixed solvent, and 1.56mL TEOS was added. After stirring continuously for 30 min, slowly add 1 g PVP (molecular weight 1300000) and 2 g PVP (molecular weight 50000) under high-speed stirring, and continue stirring for 6 h until the solution is clear and transparent to obtain spinning solution B.

[0041] The obtained precursor solution was subjected to electrospinning: at room temperature, the humidity was controlled at 30%, the spinning voltag...

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Abstract

The invention relates to a preparation method of a CaSi2O2N2:Ce,Tb / Eu multi-layer and multi-color fluorescent fiber film. The preparation method comprises the following steps: (1) using europium nitrate, terbium nitrate, cerous nitrate, calcium nitrate and tetraethyl orthosilicate as raw materials, and adding to a mixed solvent; then adding polyvinylpyrrolidone to a uniformly mixed solution, and stirring to obtain a transparent spinning solution; (2) obtaining a layered original fiber film by controlling the static spinning time; calcinating the fiber film in air atmosphere to obtain a layered Ca-Si-O-Ce,Tb / Eu fiber film; (3) carrying out nitridation in the air atmosphere to obtain a CaSi2O2N2:Ce,Tb / Eu fluorescent fiber film of a layered structure. The fluorescent fiber film is a purely inorganic fluorescent fiber film, and can be suitable for long-distance packaging of high-power white LEDs (Light-Emitting Diodes). Through the layered structure of fluorescent fibers with different emission wavelengths, secondary absorption of emitted light can be reduced, and thus the luminous efficiency is improved.

Description

technical field [0001] The invention belongs to the field of fluorescent materials for high-power white LEDs, in particular to a CaSi 2 o 2 N 2 : Preparation method of Ce, Tb / Eu multilayer multicolor fluorescent fiber membrane. Background technique [0002] As a new generation of lighting sources, white LEDs are developing towards high efficiency and high power. Remote packaging has become another feasible way to solve the light decay and color drift of high-power white LEDs. The LED remote phosphor device attaches the phosphor to the substrate (usually silicon rubber) and separates it from the blue LED light source, thereby reducing the influence of the heat generated by the chip on the luminous performance of the phosphor. However, in high-power LEDs, silicone rubber also has aging discoloration, and nitrides (or oxynitrides) synthesized by high-temperature solid-state methods are difficult to mix with silicone rubber because of their large particle size and serious ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728D06C7/00C04B35/58C04B35/622C09K11/59
CPCC04B35/597C04B2235/3208C04B2235/3224C04B2235/3229C04B2235/443C04B2235/483C04B2235/658C04B2235/661C04B2235/9646C09K11/7783D04H1/4382D04H1/728D06C7/00D10B2401/20D10B2505/00
Inventor 王宏志崔博李耀刚张青红
Owner DONGHUA UNIV