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Perovskite nano-material, composite luminescent material containing perovskite nano-material, and preparation method and application thereof

A technology of nanomaterials and luminescent materials, applied in the field of materials, can solve the problems that β-CsPbI cannot exist stably at room temperature, cannot meet the production conditions, and loses the size limitation effect, and achieves broad market application prospects, excellent luminescent performance, and stable fluorescence Sexual Enhancement Effects

Active Publication Date: 2020-12-04
ZHIJING NANOTECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

α-CsPbI 3 The problem of not being stable at room temperature hinders its practical application
Similarly, β-CsPbI 3 are not stable at room temperature
δ-CsPbI instead of perovskite structure 3 Does not have photoelectric performance
In situ preparation of CsPbI 3 / polymer composite film, the melting point of commonly used polymer materials is usually lower than 250 ° C, to obtain α-CsPbI 3 and β-CsPbI 3 The production conditions of the polymer material need to be prepared above the melting point of the polymer material, which will cause the polymer matrix to lose its size-limiting effect on the in-situ-generated perovskite nanoparticles, and produce large-grained perovskite particles, resulting in a decrease in its luminescent performance.
It is prepared below the melting point of the polymer material and cannot meet the requirements of α-CsPbI 3 and β-CsPbI 3 The generation conditions of

Method used

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  • Perovskite nano-material, composite luminescent material containing perovskite nano-material, and preparation method and application thereof
  • Perovskite nano-material, composite luminescent material containing perovskite nano-material, and preparation method and application thereof
  • Perovskite nano-material, composite luminescent material containing perovskite nano-material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0156] The rest of the steps are the same as in Comparative Example 1, the difference is that in solution A, the polymer is polyacrylonitrile (PAN), the organic solvent is dimethyl sulfoxide (DMSO), and the mass ratio of polymer to organic solvent is 1:6 , adding the additive ZnI 2 , to control the mass ratio for the polymer:ZnI 2 =1:0.5, the mechanical stirring is not less than 6h to obtain a clear and transparent solution. In B solution, the organic solvent is dimethyl sulfoxide (DMSO), control PbI 2 : The molar ratio of CsI is 1:0.75, and the organic solvent is controlled: (PbI 2 +CsI) has a mass ratio of 1:0.001. In the precursor solution, the mass ratio of solution A: solution B is controlled to be 1:1. The precursor solution was transferred to a transparent glass sheet by dipping and pulling method, and the thickness of the precursor solution on the transparent glass sheet was controlled to be 0.2 mm. The air pressure in the vacuum drying oven was 0.01 MPa, the tempe...

Embodiment 2

[0158] All the other steps are with embodiment 1, difference is, control organic solvent: (PbI 2 +CsI) with a mass ratio of 1:0.1. Stir mechanically to mix the solution evenly, remove the solvent in a vacuum oven and place it on a heating plate at 150°C for 10 minutes to obtain γ-CsPbI 3 Quantum dot / PAN composite film. Figure 5 It is the emission spectrum diagram of the sample, and the luminescence peak is located at 606nm. This sample XRD test result and Figure 4 Similarly, the XRD pattern shows that the sample is in the gamma phase.

Embodiment 3

[0160] All the other steps are with comparative example 1, and difference is, in first solution, polymer is polyvinylidene chloride (PVDF), and organic solvent is trimethyl phosphate (TMP), and control polymer: the mass ratio of organic solvent is 1:15. In the second solution, the organic solvent is trimethyl phosphate (TMP), and the organic solvent and (PbI 2 +CsI) with a mass ratio of 1:0.2, PbI 2 The molar ratio to CsI is 1:0.1. The mass ratio of solution A and solution B is 1:0.02. Transfer the precursor solution to the glass petri dish by the solution sinking method, control the thickness of the precursor solution in the glass petri dish to 5mm, the air pressure in the vacuum drying oven is 0.05MPa, the temperature is 110°C, and dry for 10h to obtain γ-CsPbI 3 Quantum dot / PVDF composite film. Figure 6 It is the emission spectrum diagram of the sample, and the luminescence peak is located at 655nm. This sample XRD test result and Figure 4 Similarly, the XRD pattern...

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Abstract

The invention discloses a perovskite nano material, which is characterized in that the perovskite nano material comprises gamma CsPbI3, and the size of the perovskite nano material in at least one dimension is 2-50 nm. The invention also provides a composite luminescent material which comprises a matrix and the perovskite nano material. The problems of poor stability and low quantum yield of a redlight emitting film in a perovskite quantum dot / polymer composite luminescent material are solved.

Description

technical field [0001] The application relates to a perovskite nanometer material, a composite luminescent material containing it, a preparation method and application thereof, and belongs to the field of materials. Background technique [0002] The structural formula of perovskite materials is generally ABX 3 , where A can be K + 、Na + , Rb + 、Cs + And small molecule organic cations, etc., B can be Pb 2+ , Sn 2+ 、Ti 4+ 、Cr 3+ 、 Bi 3+ and other elements, X can be composed of O 2- , Cl - 、Br - , I - , S 2- and other anions. Materials with a perovskite structure have many unique physical and chemical properties, such as light absorption, electrocatalysis, etc., and have a wide range of applications in the fields of chemistry and physics. Halogen perovskite is a kind of perovskite structure compound in which X is a halogen (Cl, Br, I) anion, where A can be a small molecule organic cation or an inorganic metal cation, which are called organic-inorganic hybrid halo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66B82Y20/00H01L51/50H01L51/42H01L41/18G02F1/13357H10N30/85
CPCC09K11/025C09K11/665B82Y20/00G02F1/1336H10K50/115H10K30/50H10K59/10Y02E10/549C09K11/02C09K11/66C09K11/61Y02P70/50
Inventor 李飞钟海政王晶晶
Owner ZHIJING NANOTECH CO LTD
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