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A blue-yellow-orange light perovskite quantum dot and molecular sieve composite luminescent material and its preparation method and application

A technology of orange-light perovskite and luminescent materials, which is applied in the field of blue-yellow-orange perovskite quantum dots and molecular sieve composite luminescent materials and its preparation, and can solve problems such as poor stability, attenuation of luminous efficiency, and great influence of surface ligands. problems, to achieve the effect of expanding the application range, increasing the fluorescence lifetime and stability, and high purity of the luminous color

Inactive Publication Date: 2019-01-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But at the same time, due to the large specific surface area and high surface energy of pure quantum dot materials, they are greatly affected by surface ligands, and their luminous efficiency is often severely attenuated in the solid state, and their stability is poor, which limits to a certain extent. Its further application in the field of some luminescent materials such as white LED

Method used

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  • A blue-yellow-orange light perovskite quantum dot and molecular sieve composite luminescent material and its preparation method and application
  • A blue-yellow-orange light perovskite quantum dot and molecular sieve composite luminescent material and its preparation method and application
  • A blue-yellow-orange light perovskite quantum dot and molecular sieve composite luminescent material and its preparation method and application

Examples

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Embodiment 1

[0044] A preparation process of a blue-light perovskite quantum dot and molecular sieve composite luminescent material, specifically comprising the following steps:

[0045] (1) Accurately weigh 2.13g of cesium bromide (CsBr), add 10ml of distilled water and stir at room temperature to dissolve cesium bromide to obtain a cesium bromide solution; add 1.0g Y-type molecular sieve into the cesium bromide solution, stir at 50°C for 10h (stir The rotating speed is 400r / min), centrifuged (the rotating speed is 3500r / min) for 5min, the lower layer sample is taken, washed twice with distilled water, and dried at 80°C for 10h to obtain Cs + Exchanged Y-type molecular sieve;

[0046] (2) Mix octadecene (ODE) 5ml, oleic acid (OA) 1ml, oleylamine (OAm) 1ml, lead chloride (PbCl 2 ) 0.026g and lead bromide (PbBr 2 ) 0.0345g was mixed in a 50ml three-neck flask, and 1.0ml trioctylphosphine was added, and vacuumized at 80°C for 10min, N 2 Stir at 120°C under the atmosphere (the stirring spe...

Embodiment 2

[0052] A preparation process of a blue-light perovskite quantum dot and molecular sieve composite luminescent material, specifically comprising the following steps:

[0053] (1) Accurately weigh 0.213g of cesium bromide (CsBr), add 10ml of distilled water and stir at room temperature to dissolve the cesium bromide to obtain a cesium bromide solution; add 1.5g of Y-type molecular sieve into the cesium bromide solution, stir at 30°C for 10h (stirring 400r / min), centrifuge (centrifuge at 3500r / min) for 5min, take the lower layer sample, wash twice with distilled water, repeat the steps of molecular sieve stirring in cesium bromide solution, centrifugation and washing for 3 times, and at 60℃ After drying for 10 h, Cs was obtained + Exchanged Y-type molecular sieve;

[0054] (2) Mix octadecene (ODE) 5ml, oleic acid (OA) 0.5ml, oleylamine (OAm) 0.5ml, lead chloride (PbCl 2 ) 0.026g and lead bromide (PbBr 2 ) 0.0345g was mixed in a 50ml three-neck flask, and 1.0ml trioctylphosphin...

Embodiment 3

[0060] A preparation process of a yellow light perovskite quantum dot and molecular sieve composite luminescent material, specifically comprising the following steps:

[0061] (1) Accurately weigh 1.065g of cesium bromide (CsBr), add 5ml of distilled water and stir at room temperature to dissolve the cesium bromide to obtain a cesium bromide solution; add 1.0g Y-type molecular sieve into the cesium bromide solution, stir at 80°C for 8h (stir The rotating speed is 400r / min), centrifuged (the rotating speed is 3500r / min) for 5min, the lower layer sample is taken, washed twice with distilled water and dried at 100°C for 8h to obtain Cs + Exchanged Y-type molecular sieve;

[0062] (2) Add 5ml of octadecene (ODE), 0.5ml of oleic acid (OA), 0.5ml of oleylamine (OAm), lead bromide (PbBr 2 ) 0.041g and lead iodide (PbI 2 ) 0.035g mixed in a 50ml three-necked bottle, vacuumed at 120°C for 10min, N 2 Stir the reaction at 130°C under the atmosphere (the stirring speed is 600r / min) unt...

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Abstract

The invention discloses a blue, yellow and orange light calcium titanium mining quantum dot and a molecular sieve composite luminescent material and a preparing method and application thereof, and belongs to the field of luminescent materials. The method comprises the steps of 1, adding a molecular sieve into a cesium halide solution to stir to obtain a molecular sieve of Cs+ exchange; 2, adopting octadecene, oleic acid, oleylamine and lead halide as raw materials, heating and stirring the mixture at N2 atmosphere, and adjusting the molar ratio of different halogens in lead halide to obtain a lead halide solution; 3, mixing the molecular sieve of Cs+ exchange and octadecene, heating and stirring the mixture at N2 atmosphere, and injecting the mixture into the lead halide solution to react to obtain the composite luminescent material. The molecular sieve composite luminescent material is good in luminous efficiency and high in color purity and has narrow emission peaks at 465 nm (blue), 570 nm (yellow) and 590 nm (orange), the emission peaks is adjustable in the range according to halogen elements, meanwhile the fluorescent lifetime is obviously prolonged, and the composite luminescent material is stable in a solid state and can be applied to the fields of white light LED and the like.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and in particular relates to a blue-yellow-orange light perovskite quantum dot and molecular sieve composite luminescent material and a preparation method and application thereof. Background technique [0002] Quantum dots are semiconductor nanoparticles composed of II-VI or III-V elements, and the particle size is generally stable between 2 and 20 nm. Due to its own unique properties such as quantum effects, it has many excellent properties, such as adjustable emission wavelength according to particle size, high color purity and high luminous efficiency, etc. It has great potential in solar cells, light-emitting devices, optical biomarkers, etc. It has a wide range of application prospects, so it has attracted continuous attention and research in the field of optical materials. Especially in the research in recent years, the perovskite quantum dot material (CsPbX 3 , X = Cl, Br, I) has a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/66H01L33/50C01B39/02C01B39/24
CPCC01B39/026C01B39/24C01P2006/60C09K11/665C09K11/666H01L33/502H01L2933/0041Y02B20/00
Inventor 叶柿孙佳奕张勤远
Owner SOUTH CHINA UNIV OF TECH
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