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Preparation method of polymer modified perovskite particle
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A polymer and perovskite technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems that are not applicable to the biomedical industry, and achieve the effects of good protection function, good dispersion, and high fluorescence intensity
Inactive Publication Date: 2017-05-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0003] Chinese invention patent 201510245596.6, titled: A perovskite/polymer luminescent material and its preparation, this invention prepares a composite thin film material, the formed perovskite is dispersed
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Embodiment 1
[0028] Step 1: Dissolve 11.20 mg of methyl ammonium bromide and 1 ml of oleylamine in 0.5 ml of DMF at room temperature;
[0029] Step 2: Dissolve 28.07 mg of lead bromide in 2 ml of N,N-dimethylformamide at a dissolution temperature of 30°C, then add 2 ml of a DMF solution of 40 mg of polyethylene glycol-polycarboxycaprolactone, and mix well;
[0030] Step 3: Add the solution obtained in Step 2 dropwise to the solution obtained in Step 1, and mix well at room temperature;
[0031] Step 4: Add 20 μl of the mixed solution obtained in Step 3 dropwise into 3 ml of the toluene solution to obtain a toluene dispersion solution of the desired polymer-modified perovskite particles.
[0032] After testing: the particle size of the obtained particles is about 4.7nm, the distribution is uniform, stable, the luminous intensity is high, and the color purity is high.
Embodiment 2
[0034] Step 1: Take 33.6mg methyl ammonium bromide, add 10μl DMF to mix,
[0035] Step 2: Weigh 110.1mg of PbBr2 and 40mg of polyacrylic acid-polybutylacrylate copolymer and dissolve them in 10ml of DMF solution, and dissolve them completely at 40°C;
[0036] Step 3: Mix the solution obtained in Step 2 and Step 1 evenly;
[0037] Step 4: Add the mixed solution obtained in Step 3 into 100 ml of diethyl ether dropwise to obtain a diethyl ether dispersion solution of the desired polymer-modified perovskite particles.
Embodiment 3
[0039] Step 1: Take 22.4 mg of methyl ammonium bromide and dissolve it in 1 ml of DMSO solution;
[0040] Step 2: Weigh 73.4mg of PbBr2, dissolve it in 4ml of DMSO at room temperature until it completely dissolves into a clear and transparent solution, then add 1ml of DMSO solution of 22.4mg of polycaprolactone-polyethyleneimine copolymer and mix evenly;
[0041] Step 3: Mix the solutions obtained in Step 1 and Step 2 evenly at room temperature;
[0042] Step 4: Take 0.5ml of the mixed solution obtained in Step 3 and add it dropwise into 10ml of toluene solution to obtain the toluene dispersion solution of the desired polymer-modified perovskite particles;
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Abstract
The invention discloses a preparation method of a polymer modified perovskite particle. The preparation method comprises the following steps of adding metal salt or organic ammonium salt into an organic solvent I, and then adding a polymer and oleic acid; adding a halide of metal B into the organic solvent I, and then adding oleic acid, oleylamine and a polymer; mixing the two solutions uniformly; and adding the mixed solution into an organic solvent II. The perovskite particle prepared in the invention is high in dispersity and high in stability, and the obtained fluorescence intensity is high; a high-molecular compound on the surface of the particle can provide a good protective function for the perovskite particle, and besides, functional groups or functional fragments on macromolecular chain fragments can provide the capacity that the perovskite particle is further connected with biomolecules or other functional molecules.
Description
technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a polymer-modified perovskite particle and a preparation method thereof. Background technique [0002] The lattice of perovskite materials usually presents an octahedral shape, and the general molecular formula is ABC 3 . A is alkali metals, alkaline earth metals and lanthanides with an ionic radius greater than 0.09nm, and RNH 3 , (R is a hydrocarbon group with different chain lengths), B is a transition metal ion with an ionic radius greater than 0.05nm, such as: Pb, Ti, Al, Sn, Mn, Fe, Cu, Co, Ni, Zn, Ru , Cd, Ag, etc.; C are halogen F, Cl, Br, I. Perovskite structure compounds have special optical, magnetic and electrical properties. In order to increase the functionality and biocompatibility of perovskite, its surface is modified with biomaterials. [0003] Chinese invention patent 201510245596.6, titled: A perovskite / polymer luminescent material and its p...
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