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Method for assembling perovskite quantum dot fluorescent ring from methylammonium lead bromide perovskite quantum dots

A methylamine lead bromide perovskite and quantum dot technology, applied in chemical instruments and methods, nano-optics, luminescent materials, etc., can solve problems such as lack of fluorescence conditions, and achieve simple process, good processability and low cost. Effect

Active Publication Date: 2017-10-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of microrings is to transform ferric nitrate droplets into bubble rings and then into ring-like iron oxide microrings. The composition is metal oxide, which does not have the fluorescence conditions, so this microring is not a fluorescent ring.

Method used

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  • Method for assembling perovskite quantum dot fluorescent ring from methylammonium lead bromide perovskite quantum dots
  • Method for assembling perovskite quantum dot fluorescent ring from methylammonium lead bromide perovskite quantum dots
  • Method for assembling perovskite quantum dot fluorescent ring from methylammonium lead bromide perovskite quantum dots

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 1) Put a 2.5cm*2.5cm glass slide into a beaker, first pour in the piranha solution and boil for 30 minutes, then pour in ethanol solution and deionized water solution in turn, and ultrasonically clean each for 30 minutes. Take it out, dry it with nitrogen, and put it into a clean and dry petri dish.

[0029] 2) Preparation of methylamine-lead-bromide perovskite quantum dots: add 0.556g of PbCl to 110mL of DMF 2 , 0.108g of CH 3 NH 3 Cl, 1.9g of KBr, 5mL of oleic acid, 200uL of n-octylamine, sonicated for 4h to obtain CH 3 NH 3 PbBr 3 Milky white quantum dot solution. The total concentration of Pb in the final solution was 0.0174mol / L. CH 3 NH 3 Cl / PbCl 2 The molar ratio of / KBr is 4 / 5 / 40. The volume ratio of n-octylamine / oleic acid / DMF is 1 / 25 / 550.

[0030] 3) Take 20uL of the DMF solution of methylamine-lead-bromide perovskite quantum dots and 1mL of toluene, and dissolve the DMF solution of methylamine-lead-bromide perovskite quantum dots in toluene to make...

Embodiment 2

[0033] 1) Put a 3cm*3cm glass slide into a beaker, first pour piranha solution and boil for 40 minutes, then pour ethanol solution and deionized water solution in turn, and ultrasonically clean each for 40 minutes. Take it out, dry it with nitrogen, and put it into a clean and dry petri dish.

[0034] 2) Preparation of methylamine-lead-bromide perovskite quantum dots: add 0.550g of PbCl to 100mL of DMF 2 , 0.100g of CH 3 NH 3 Cl, 1.8g of KBr, 4.5mL of oleic acid, 200uL of n-octylamine, sonicated for 2h to obtain CH 3 NH 3 PbBr 3 Milky white quantum dot solution. The total concentration of Pb in the final solution was 0.017mol / L. CH 3 NH 3 Cl / PbCl 2 The molar ratio of / KBr is 4 / 5 / 40. The volume ratio of n-octylamine / oleic acid / DMF is 1 / 25 / 550.

[0035] 3) Take 20uL of the DMF solution of methylamine-lead-bromide perovskite quantum dots and 1mL of toluene, and dissolve the DMF solution of methylamine-lead-bromide perovskite quantum dots in toluene to make 2.78ⅹ10 -4 ...

Embodiment 3

[0038] 1) Put a 2.5cm*2.5cm glass slide into a beaker, first pour piranha solution and boil for 35 minutes, then pour ethanol solution and deionized water solution in turn, and ultrasonically clean each for 35 minutes. Take it out, dry it with nitrogen, and put it into a clean and dry petri dish.

[0039] 2) Preparation of methylamine-lead-bromide perovskite quantum dots: add 0.56g of PbCl to 120mL of DMF 2 , 0.11g of CH 3 NH 3 Cl, 2g of KBr, 5mL of oleic acid, 200uL of n-octylamine, sonicated for 3h to obtain CH 3 NH 3 PbBr 3 Milky white quantum dot solution. The total concentration of Pb in the final solution was 0.0178mol / L. CH 3 NH 3 Cl / PbCl 2 The molar ratio of / KBr is 4 / 5 / 40. The volume ratio of n-octylamine / oleic acid / DMF is 1 / 25 / 550.

[0040] 3) Take 20uL of the DMF solution of methylamine-lead-bromide perovskite quantum dots and 1.5mL of toluene, and dissolve the DMF solution of methylamine-lead-bromide perovskite quantum dots in toluene to make 2.78ⅹ10 -3...

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Abstract

The present invention discloses a method for preparing a perovskite quantum dot fluorescent ring from methylammonium lead bromide perovskite quantum dots. The method comprises: 1, washing a glass slide, wherein a piranha solution (comprising concentrated sulfuric acid and 30% hydrogen peroxide according to a ratio of 7:3) is poured, boiling is performed, an ethanol solution and a deionized water solution are sequentially poured, ultrasonic cleaning is respectively performed for 15-30 min, the glass slide is taken out, and blow drying is performed with nitrogen; 2, dissolving the dimethylformamide (DMF) solution of methylammonium lead bromide perovskite quantum dots in toluene to prepare a methylammonium lead bromide perovskite quantum dot toluene solution; and 3, dropping the methylammonium lead bromide perovskite quantum dot toluene solution on the glass slide by using a pipette, and waiting at a room temperature until the methylammonium lead bromide perovskite quantum dot toluene solution is dried so as to obtain the perovskite quantum dot fluorescent ring. According to the present invention, the perovskite quantum dot fluorescent ring is prepared based on the methylammonium lead bromide perovskite quantum dots, such that the self-assembly of the methylammonium lead bromide perovskite quantum dots is achieved, and the methylammonium lead bromide perovskite quantum dot fluorescent ring preparation method is firstly provided.

Description

technical field [0001] The invention relates to a technique for assembling perovskite quantum dot fluorescent rings using methylamine lead bromine perovskite quantum dots as raw materials, and belongs to the technical field of quantum dot fluorescent ring assembly. Background technique [0002] New quantum dot luminescent materials have the advantages of wide absorption range, narrow luminescence band, and strong photostability, and can obtain various monochromatic lights with emission colors covering the entire visible light band by controlling their size and composition. Therefore, quantum dots can be used as a A new type of luminescent material is used in the laser field. The ring structure has attracted people's attention because of its unique physical and chemical properties and its important potential application value in the fields of light, electricity, catalysis and storage. At present, the preparation method of microrings is to transform ferric nitrate droplets in...

Claims

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Application Information

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IPC IPC(8): C09K11/66B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/665
Inventor 王春雷王翔徐淑宏崔一平
Owner SOUTHEAST UNIV
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