Unlock instant, AI-driven research and patent intelligence for your innovation.

Large size perovskite cspbbr 3 The preparation method of hexagonal sheet-circular sheet

A large-scale, perovskite technology, applied in chemical instruments and methods, lead compounds, inorganic chemistry, etc., can solve the problems of single morphology, small size, and high synthesis temperature of inorganic perovskite materials, and achieve convenient application and improvement. Electrical conductivity, effect of low synthesis temperature

Active Publication Date: 2019-10-11
SHANDONG INST OF BUSINESS & TECH +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of single morphology, small size and high synthesis temperature of inorganic perovskite materials in the prior art, the present invention provides a low-temperature synthesis of large-size perovskite CsPbBr with quantum effect 3 The preparation method of hexagonal sheet-circular sheet

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Large size perovskite cspbbr <sub>3</sub> The preparation method of hexagonal sheet-circular sheet
  • Large size perovskite cspbbr <sub>3</sub> The preparation method of hexagonal sheet-circular sheet
  • Large size perovskite cspbbr <sub>3</sub> The preparation method of hexagonal sheet-circular sheet

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] 1) Prepare a mixed precursor solution containing Cs-OA and Pb-OA: weigh 0.0081g Cs 2 CO 3 , 0.01151g PbO (molar ratio 1:2) mixed with 0.5ml oleic acid, add 10ml octadecene as solvent, under argon protection 100 o C reaction 20min.

[0027] 2) Prepare bromine-containing mixed solvent: Weigh 0.096g TBABr (tetrabutylammonium bromide) and add it to 5ml octadecene, and add 0.5ml oleic acid and 0.5ml oleylamine in turn, under argon protection at 120 o C reaction 20min.

[0028] 3) CsPbBr 3 Preparation of hexagonal sheet structure: reduce the temperature of bromine-containing mixed solvent to 90 o C. Use a needle to take 3ml of the mixed precursor solution containing Cs-OA and Pb-OA and inject it into the bromine-containing mixed solvent, and react for 15 seconds to cool down. Such as figure 2 , to prepare CsPbBr with a size >100nm 3 Hexagonal pieces.

[0029] The order of adding oleic acid and octadecene in the above step 1] does not make specific requirements; the a...

example 2

[0032] 1) Prepare a mixed precursor solution containing Cs-OA and Pb-OA: weigh 0.0081g Cs 2 CO 3 , 0.01151g PbO (molar ratio 1:2) mixed with 0.5ml oleic acid, add 10ml octadecene as solvent, under argon protection 100 o C reaction 20min.

[0033] 2) Prepare bromine-containing mixed solvent: Weigh 0.096g TBABr (tetrabutylammonium bromide) and add it to 5ml octadecene, and add 0.5ml oleic acid and 0.5ml oleylamine in turn, under argon protection at 120 o C reaction 20min.

[0034] 3) CsPbBr 3 Preparation of hexagonal sheet structure: reduce the temperature of bromine-containing mixed solvent to 90 o C. Use a needle to take 3ml of the mixed precursor solution containing Cs-OA and Pb-OA and inject it into the bromine-containing mixed solvent, and react for 5 minutes to cool down. Such as image 3 , to prepare CsPbBr with a size >100nm 3 round slices.

example 3

[0036] 1) Prepare a mixed precursor solution containing Cs-OA and Pb-OA: weigh 0.0081g Cs 2 CO 3 , 0.01151g PbO (molar ratio 1:2) mixed with 0.5ml oleic acid, add 10ml octadecene as solvent, under argon protection 100 o C reaction 20min.

[0037] 2) Prepare bromine-containing mixed solvent: Weigh 0.096g TBABr (tetrabutylammonium bromide) and add it to 5ml octadecene, and add 0.5ml oleic acid and 0.5ml oleylamine in turn, under argon protection at 120 o C reaction 20min.

[0038] 3) CsPbBr 3 Preparation of hexagonal sheet structure: reduce the temperature of bromine-containing mixed solvent to 100 oC. Use a needle to take 3ml of the mixed precursor solution containing Cs-OA and Pb-OA and inject it into the mixed solvent containing bromine, and the reaction is cooled for 5s. Preparation of CsPbBr with size >100nm 3 Hexagonal pieces.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for preparing a large-sized perovskite CsPbBr3 hexagonal-round piece with a quantum effect through low-temperature synthesis. The method comprises the following steps: preparing a mixed precursor solution containing Cs-OA and Pb-OA; heating to dissolve TBABr into octadecene, and adding oleic acid and oleylamine as a surface ligand, so as to obtain a bromine-containing mixed solvent; and rapidly stirring and mixing the mixed precursor solution with the bromine-containing mixed solvent at a certain temperature, so as to obtain the large-sized perovskite CsPbBr3 hexagonal-round piece with the quantum effect. The perovskite CsPbBr3 hexagonal-round piece prepared by virtue of the preparation method is low in synthetic temperature and convenient to apply, has a large size and adjustable quantum performance and can be applied to the fields of solar cells, photoelectric detectors, light emitting diodes and the like.

Description

technical field [0001] The invention belongs to the technical field of photoelectric material preparation, in particular to a low-temperature synthesis of large-size inorganic perovskite fluorescent CsPbBr with quantum effects 3 Method for the preparation of hexagonal-circular tablets. Background technique [0002] Perovskite crystals with ABX 3 (X = Cl, Br, I) Structure Semiconductors belong to the orthorhombic, tetragonal or cubic crystal system. Quantum effects based on perovskite structures have attracted great attention due to their excellent optical properties and potential applications in solar cells, photodetectors, and light-emitting diodes. Organic-inorganic hybrid CH 3 NH 3 wxya 3 (X = Cl, Br, I) and all inorganic CsPbX 3 (X = Cl, Br, I) is the perovskite quantum effect that is currently the focus of research. Metal organic halide perovskite materials can indeed emit light, but due to their small exciton binding energy and many defects, the quantum efficie...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/66C01G21/00
Inventor 林忠海王平建魏广芬王智晓张帅
Owner SHANDONG INST OF BUSINESS & TECH