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Fluorescent perovskite/graphene composite film, and preparation method thereof

A graphene composite and perovskite technology, applied in chemical instruments and methods, luminescent materials, electrolytic coatings, etc. Poor performance and other problems, to achieve the effect of good dispersion, good fluorescence, good conductivity

Inactive Publication Date: 2017-06-20
HUZHOU TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research and application of polymer-modified fluorescent perovskite particles are rare.
Chinese patent CN 104861958B discloses a perovskite / polymer luminescent material and its preparation method, in which perovskite particles are embedded in the molecular gap of the polymer, and the polymer is polyvinylidene fluoride, polyvinyl acetate, cellulose acetate Any one of element and polysulfone, the material prepared by this method is a flexible film or solid powder, with good fluorescence, but the uniformity and controllability of the film need to be improved
Chinese patent CN 103050572B discloses a method for preparing a perovskite / graphene composite thin film electrode. Nitrate and citric acid are added to the graphene suspension to form a gel, which is polymerized into a gel and sintered to obtain a perovskite / graphene composite film electrode. Graphene, and then disperse the perovskite / graphene in the ethanol solution to form a suspension, and obtain the perovskite / graphene composite thin film electrode material by DC electric field deposition, but this preparation method requires high temperature sintering, and the requirements for equipment are relatively high. High, and the prepared thin film material has good conductivity, but poor optical performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Dissolve 11.2 mg of methylammonium bromide and 1 ml of oleylamine in 0.5 ml of DMF at room temperature, and mix well to form solution A.

[0033] (2) Dissolve 28.07mg of lead bromide in 2ml of N,N-dimethylformamide at a melting temperature of 30°C, then add 2ml of DMF solution of 40mg of polyethylene glycol-polycarboxycaprolactone, mix well to form a solution b.

[0034] (3) Add hydrazine hydrate dropwise to the graphene oxide suspension, heat it in a constant temperature water bath at 80°C for 10 hours, wash the reactant until neutral, and dry it in vacuum to obtain a graphene material, which is added to distilled water to form graphite Alkene suspension.

[0035](4) Add solution A and solution B into the graphene suspension, and stir evenly at room temperature to obtain a mixed solution, wherein the mass fraction of graphene in the mixed solution is 0.1 mg / mL.

[0036] (5) 20 μl of the mixed solution was added dropwise into 3 ml of toluene solution to obtain a f...

Embodiment 2

[0039] (1) Dissolve 33.6 mg of methylammonium bromide and 1 ml of oleylamine in 10 μl of DMF at room temperature, and mix well to form solution A.

[0040] (2) Dissolve 110.1 mg of PbBr2 polyacrylic acid-polybutyl acrylate 40 mg in 10 ml of DMF at a dissolution temperature of 40° C. and mix well to form solution B.

[0041] (3) Add hydrazine hydrate dropwise to the graphene oxide suspension, heat it in a constant temperature water bath at 80°C for 10 hours, wash the reactant until neutral, and dry it in vacuum to obtain a graphene material, which is added to distilled water to form graphite Alkene suspension.

[0042] (4) Add solution A and solution B into the graphene suspension, and mix uniformly at room temperature to obtain a mixed solution, wherein the mass fraction of graphene in the mixed solution is 0.4 mg / mL.

[0043] (5) 20 μl of the mixed solution was added dropwise into 100 ml of ether to obtain a fluorescent ore titanite / graphene composite solution, wherein the m...

Embodiment 3

[0046] (1) Dissolve 22.4 mg of methyl ammonium bromide in 1 ml of DMSO solution and mix well to form solution A.

[0047] (2) Dissolve 73.4mg of PbBr2 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, mix well to form a solution b.

[0048] (3) Add hydrazine hydrate dropwise to the graphene oxide suspension, heat it in a constant temperature water bath at 80°C for 10 hours, wash the reactant until neutral, and dry it in vacuum to obtain a graphene material, which is added to distilled water to form graphite Alkene suspension.

[0049] (4) Add solution A and solution B into the graphene suspension, and mix uniformly at room temperature to obtain a mixed solution, wherein the mass fraction of graphene in the mixed solution is 0.3 mg / mL.

[0050] (5) 20 μl of the mixed solution was added dropwise into 10 ml of toluene to obtain a fluores...

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Abstract

The invention provides a fluorescent perovskite / graphene composite film and a preparation method thereof, wherein Li, Na, K, Rb, Cs, Mg, Ca, Ba, Sr, Pr, Nd, Gd, Sm metal salts or organic ammonium Halogen salt with polymer and oleic acid to form solution A; add metal halides of Pb, Ti, Al, Sn, Mn, Fe, Cu, Co, Ni, Zn, Ru, Cd, Zr, Pd, Bi, Ag Form solution B with oleic acid, oleylamine and polymer; add solution A and solution B to graphene suspension, and then add organic solvent II to obtain fluorescent ore titanium / graphene composite solution; finally obtain fluorescent calcium by electrophoretic deposition TiO / Graphene Composite Thin Films. The perovskite particles and graphite in the composite film prepared by the invention are evenly dispersed, have high stability, high fluorescence intensity, simple preparation method and strong selectivity, and can be used in the fields of solar cells and biomedicine.

Description

technical field [0001] The invention belongs to the technical field of perovskite composite film materials, and in particular relates to a fluorescent perovskite / graphene composite film and a preparation method thereof. Background technique [0002] Perovskite refers to a class of ceramic oxides. Its molecular formula is ABO3. It is a new type of inorganic non-metallic material with unique physical and chemical properties. The A site is generally a rare earth or alkaline earth element ion, and the B site is a transition element. Ions, A-site and B-site can be partially replaced by other metal ions with similar radius to keep its crystal structure basically unchanged, so theoretically it is an ideal sample for studying the surface and catalytic performance of catalysts. Perovskite has a stable crystal structure, unique electromagnetic properties and high redox, hydrogenolysis, isomerization, electrocatalysis and other activities, and the A or B sites in standard perovskites a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L33/02C08L87/00C08K3/04C09K11/02C09K11/66C25D13/02C25D13/12
CPCC08K3/04C08J5/18C08J2333/02C08J2367/00C08J2387/00C09K11/025C09K11/66C25D13/02C25D13/12
Inventor 付竹兰杨秀枝
Owner HUZHOU TEACHERS COLLEGE
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