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A kind of ultraviolet excitation white light multi-component non-lead perovskite phosphor and preparation method thereof

A technology of phosphor powder and perovskite structure, applied in luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of low yield and high cost of liquid phase synthesis, and achieve high fluorescence quantum yield and continuous emission spectrum. adjustable effects

Active Publication Date: 2020-09-18
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, in view of the problems of low yield and high cost of liquid-phase synthesis adopted in the prior art, the present invention also improves the preparation method, and uses a solid-phase synthesis method to prepare a high-quality multi-component perovskite white light fluorescent material. The cost of the synthesis process is low, the process operation is simple, suitable for large-scale production applications, and very suitable for industrial production

Method used

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  • A kind of ultraviolet excitation white light multi-component non-lead perovskite phosphor and preparation method thereof
  • A kind of ultraviolet excitation white light multi-component non-lead perovskite phosphor and preparation method thereof
  • A kind of ultraviolet excitation white light multi-component non-lead perovskite phosphor and preparation method thereof

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preparation example Construction

[0032] The present invention adopts solid phase method to carry out the preparation of above-mentioned fluorescent powder, and this method comprises the following steps:

[0033] (1) Weigh B according to the amount ratio of substances x: 1-x 1 x and b 2 X, weigh B according to the amount of substance ratio y: 1-y 3 x 3 and B 4 x 3 , while ensuring that B 1 X and B 2 The sum of the quantities of substances in X and B 3 x 3 and B 4 x 3 The sum of the quantities of substances is equal. Weigh again with B 3 x 3 , B 4 x 3 , B 1 X,B 2 CsX with the same amount of X substance, mix the basic raw materials evenly, grind them into powder, and obtain the reaction precursor;

[0034] For example, specifically weighing B at room temperature 1 X x mmol and B 2 X(1-x)mmol, weigh B 3 x 3 x mmol and B 4 x 3 (1-x)mmol, and then weighed 2mmol of AX, mixed evenly, and ground into powder to obtain a reaction precursor. A is Cs + , B 1 , B 2 for Na + 、Ag + , B 3 , B 4 ...

Embodiment 1

[0041] The preparation method of perovskite phosphor in this embodiment, its specific preparation steps are as follows:

[0042] a) Rinse the crucible with deionized water for 3 minutes, and then dry it with a nitrogen gun.

[0043] b) Weigh 0.3366g CsCl, 0.0234g NaCl, 0.0861g AgCl, 0.221g InCl 3 , mix evenly, grind finely with a mortar, and put it into a crucible.

[0044] c) Place the crucible in a muffle furnace, set the temperature of the muffle furnace at 30°C to 460°C over 1 hour, keep it warm for 5 hours, and then cool down to room temperature naturally.

[0045] d) Take out the crucible in the muffle furnace, take out the powder in the crucible and grind it evenly in a mortar. Then put it into the crucible and perform c operation.

[0046] e) Take out the crucible in the muffle furnace, take out the powder in the crucible, and obtain Cs 2 Na 0.4 Ag 0.6 InCl 6 Phosphor.

Embodiment 2

[0048] The preparation method of perovskite phosphor in this embodiment, its specific preparation steps are as follows:

[0049] a) Rinse the crucible with deionized water for 3 minutes, and then dry it with a nitrogen gun.

[0050] b) Weigh 0.3366g CsCl, 0.0234g NaCl, 0.0762g AgF, 0.221g InCl 3 , mix evenly, grind finely with a mortar, and put it into a crucible.

[0051] c) Place the crucible in a muffle furnace, set the temperature of the muffle furnace at 30°C to 460°C over 1 hour, keep it warm for 5 hours, and then cool down to room temperature naturally.

[0052] d) Take out the crucible in the muffle furnace, take out the powder in the crucible and grind it evenly in a mortar. Then put it into the crucible and perform c operation.

[0053] e) Take out the crucible in the muffle furnace, take out the powder in the crucible, and obtain Cs 2 Na 0.4 Ag 0.6 InF 0.6 Cl 5.4 Phosphor.

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Abstract

The invention discloses ultraviolet excited white light polyhydric lead-free perovskite fluorescent powder and a preparation method thereof. The fluorescent powder has a perovskite structure, and thechemical formula is shown as A2B<1>xB<2>1-xB<3>yB<4>1-yX<1>mX<2>nX<3>6-m-n, wherein x is larger than or equal to 0 and less than or equal to 1; y is larger than or equal to 0 and less than or equal to1; m is larger than 0 and less than or equal to 6; n is larger than 0 and less than or equal to 6; 6-m-n is larger than or equal to 0 and less than or equal to 6; moreover, A is Cs<+>; B<1>, B<2>, B<3> and B<4> are Na<+>, Ag<+>, In<3+> and Bi<3+> respectively; X<1>, X<2> and X<3> are F<->, Cl<-> and Br<-> respectively. Through the key composition of the polyhydric lead-free perovskite fluorescentpowder, the overall flow process setting of the corresponding preparation method, and improvements on parameter conditions adopted in each step, compared with the prior art, the preparation method has the advantages that the kinds of near ultraviolet excited single matrix fluorescent powder can be effectively increased, a continuous adjustable function for an excited spectrum and an absorption spectrum is realized, and the adjustment of the LED (Light-Emitting Diode) light-emitting color temperature is realized.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and more specifically relates to a UV-excited white-light multi-component non-lead perovskite phosphor and a preparation method thereof. Lead perovskite white light phosphor. Background technique [0002] In recent years, with the development of the economy, the living standards and quality have been continuously improved, and the requirements for lighting sources have been continuously improved. Energy-saving, environmentally friendly and efficient lighting methods have attracted more and more attention from all parties. White LED light-emitting diodes have significant advantages such as small size, low energy consumption, fast response, long life, and no pollution. They are considered to be a new generation of lighting technology that is expected to replace traditional lighting sources. [0003] The light-emitting diode itself is a monochromatic light source. Therefore, it is necessary to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/62C09K11/74H01L33/50
CPCC09K11/628C09K11/7435H01L33/502Y02B20/00
Inventor 唐江牛广达胡满琛罗家俊刘婧李顺然张成
Owner HUAZHONG UNIV OF SCI & TECH