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Preparation method of perovskite quantum dot and metal-organic framework (MOF) composite luminescent material

A metal-organic framework and luminescent material technology, applied in the field of optical materials, can solve problems such as the inability to achieve the stability of perovskite quantum dots, and achieve the effects of reducing professional technical requirements, simple operation, and improving stability

Inactive Publication Date: 2019-07-23
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large size of perovskite quantum dots (~10 nm), the pores of MOF crystals are largely limited to the micropore range (~0.78 nm), making it difficult for perovskite quantum dots to enter the pores of MOF crystals. In this way, it cannot improve the stability of perovskite quantum dots

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  • Preparation method of perovskite quantum dot and metal-organic framework (MOF) composite luminescent material
  • Preparation method of perovskite quantum dot and metal-organic framework (MOF) composite luminescent material
  • Preparation method of perovskite quantum dot and metal-organic framework (MOF) composite luminescent material

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[0028] Specifically, see figure 1 , figure 1 It is a flow chart of a preferred embodiment of the preparation method of the perovskite quantum dot and metal organic framework composite luminescent material of the present invention, as shown in the figure, which includes steps:

[0029] S1. Under the condition of ultrasonic vibration and stirring, the lead nitrate solution is added dropwise to the trimesic acid solution, the ultrasonic vibration and stirring are continued, suction filtration, washing and drying are carried out to obtain Pb-MOF powder.

[0030] As a specific embodiment of the present invention, in this example, Pb(NO 3 ) 2 The solution concentration is 0.05~0.5mol / L, and the concentration of trimesic acid solution is 0.01~0.1mol / L. Compared with nitrogen-containing heterocyclic organic ligands, hydroxyl-containing trimesic acid has a stable skeleton structure of MOF, and after removing small molecule ligands, the remaining holes can exist stably.

[0031] Fur...

Embodiment 1

[0045] A method for preparing a perovskite quantum dot and metal-organic framework composite luminescent material, specifically comprising the following steps:

[0046] (1) Weigh 1.4904g lead nitrate (Pb(NO 3 ) 2 ), use a 50ml volumetric flask to prepare a 0.09mol / L lead nitrate solution; then weigh 0.9456g trimesic acid (1,3,5-H 3 BTC) into a 500ml beaker, add 450ml of ultra-pure water to make a trimesic acid solution; put the beaker containing the trimesic acid solution into an ultrasonic cleaner, at a temperature of 20°C and a stirring rate of 300r / min Under certain conditions, 50ml of lead nitrate solution was added dropwise to the trimesic acid solution, ultrasonically oscillated for 30 minutes, filtered with suction, and washed with ultrapure water three times, and the obtained product was dried in a constant temperature oven at 65°C for 12 hours to obtain white powder Pb -MOF.

[0047] (2) Weigh 100mg of cesium bromide (CsBr) into a 20ml beaker, add 5ml of methanol, ...

Embodiment 2

[0050] A method for preparing a perovskite quantum dot and metal-organic framework composite luminescent material, specifically comprising the following steps:

[0051] (1) Weigh 7.452g lead nitrate (Pb(NO 3 ) 2 ), using a 50ml volumetric flask to prepare a 0.18mol / L lead nitrate solution; then weigh 6.6213g trimesic acid (1,3,5-H 3 BTC) into a 500ml beaker, add 450ml of ultra-pure water to make a trimesic acid solution; put the beaker containing the trimesic acid solution into an ultrasonic cleaner, at a temperature of 20°C and a stirring rate of 300r / min Under certain conditions, 50ml of lead nitrate solution was added dropwise to the trimesic acid solution, ultrasonically oscillated for 30 minutes, filtered with suction, and washed with ultrapure water three times, and the obtained product was dried in a constant temperature oven at 65°C for 12 hours to obtain white powder Pb -MOF.

[0052] (2) Weigh 150mg of cesium bromide (CsBr) into a 20ml beaker, add 10ml of methanol...

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Abstract

The invention discloses a preparation method of a perovskite quantum dot and metal-organic framework (MOF) composite luminescent material. The preparation method comprises the following steps: dropwise adding a lead nitrate solution into a trimesic acid solution to obtain Pb-MOF powder under the conditions of ultrasonic oscillation and stirring; dissolving cesium halide powder in methanol, and heating to obtain a cesium halide methanol solution; dispersing the Pb-MOF powder in toluene, and dropwise adding the cesium halide solution into the toluene dispersion of Pb-MOF to obtain the compositeluminescent material of CsPbX3@Pb-MOF under the condition of ultrasonic oscillation. According to the preparation method disclosed by the invention, the porosity of the Pb-MOF is utilized to nucleatea perovskite quantum dot in the mesopores of the Pb-MOF by an in-situ growth method under the condition of room temperature and ultrasonic oscillation, and the formed CsPbX3@Pb-MOF composite luminescent material improves the stability of the perovskite quantum dot and enhances the optical properties of the perovskite quantum dot.

Description

technical field [0001] The invention relates to the field of optical materials, in particular to a preparation method of a perovskite quantum dot and metal organic framework composite luminescent material. Background technique [0002] Perovskite-type quantum dot materials have been widely studied in the field of nonlinear optics in recent years due to their excellent optoelectronic properties such as high carrier mobility, adjustable bandwidth, and high quantum yield. However, pure perovskite quantum dot materials are sensitive to environmental factors such as temperature and humidity, and the attenuation of luminescence under external conditions limits its further application. Therefore, how to solve the stability problem of perovskite quantum dots has become an urgent problem to be solved. At present, to solve the problem of poor stability of perovskite quantum dots, it is usually to use organic ligands or polymers such as titanium butoxide and tri-n-octylphosphine to mod...

Claims

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Application Information

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IPC IPC(8): C09K11/06C09K11/67C09K11/02
CPCC09K11/02C09K11/06C09K11/675
Inventor 陆顺斌陈秋行林鸿坚唐杰
Owner SHENZHEN UNIV
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