Solid-state perovskite cluster and preparation method thereof and photoelectric device

A perovskite cluster, perovskite technology, applied in chemical instruments and methods, nano-optics, luminescent materials, etc., can solve the problems of separation, poor stability of perovskite clusters, and difficult solid-state form, and achieve improved migration. Efficiency, improve binding stability, enhance the effect of stability

Pending Publication Date: 2022-01-28
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a solid-state perovskite cluster and its preparation method, as well as a photoelectric device, aiming to solve the problem of poor stability of existing perovskite clusters and difficulty in separating them in a solid state to a certain extent

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  • Solid-state perovskite cluster and preparation method thereof and photoelectric device
  • Solid-state perovskite cluster and preparation method thereof and photoelectric device
  • Solid-state perovskite cluster and preparation method thereof and photoelectric device

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preparation example Construction

[0030] as attached figure 1 As shown, the first aspect of the embodiment of the present application provides a method for preparing a solid perovskite cluster, comprising the following steps:

[0031] S10. configuring an organic carboxylic acid, an organic amine ligand, and a perovskite raw material into a precursor solution;

[0032] S20. Mixing the precursor solution and the anti-solvent to obtain a surface-passivated perovskite cluster solution;

[0033] S30. Adding a shell-forming substance to the perovskite cluster solution, forming a shell layer on the surface of the perovskite cluster, and separating to obtain a solid perovskite cluster with a core-shell structure.

[0034]In the method for preparing solid-state perovskite clusters provided in the first aspect of the embodiment of the present application, the organic carboxylic acid and organic amine ligands added to the perovskite precursor solution can passivate the surface of the perovskite clusters, It is not only...

Embodiment 1

[0065] A kind of solid-state perovskite cluster, its preparation comprises the steps:

[0066] ①Methyl ammonium bromide (CH 3 NH 3 Br) and lead bromide (PbBr 2 ) was dissolved in dimethyl sulfoxide (DMSO) solvent and stirred until completely dissolved; the initial concentration of lead bromide was 0.5mol / L, and the volume of solvent was 0.4mL; then, add octadecenoic acid and octadecyl enamine and stir to dissolve, wherein, the addition of octadecenamine is the same as that of lead bromide (PbBr 2 ) material ratio is 0.4:1, the addition of octadecenoic acid and lead bromide (PbBr 2 ) The molar ratio of the substances is 1.2:1 to obtain a precursor solution of perovskite clusters;

[0067] ②According to the volume ratio of the precursor solution to the anti-solvent toluene of 0.3:4, inject the perovskite cluster precursor solution into toluene, and react at room temperature for 2 minutes to obtain a perovskite cluster solution with surface passivation;

[0068] ③According to ...

Embodiment 2

[0070] A kind of solid-state perovskite cluster, its preparation comprises the steps:

[0071] ①Methyl bromide (CH 3 NH 3 Br) and lead bromide (PbBr 2 ) was dissolved in N,N-dimethylformamide (DMF) solvent and stirred until completely dissolved; the initial concentration of lead bromide was 0.5mol / L, and the volume of the solvent was 0.4mL; then, adding phenylacetic acid and phenylethyl The amine was stirred and dissolved, wherein, the ratio of the amount of phenylethylamine added to the amount of lead bromide was 0.4:1, the ratio of the amount of phenylacetic acid added to the amount of lead bromide was 1.2:1, and the perovskite group was obtained cluster precursor solution;

[0072] ②According to the volume ratio of precursor solution and anti-solvent of 0.3:4, inject the perovskite cluster precursor solution into toluene, and react at room temperature for 2 minutes to obtain the perovskite cluster solution with surface passivation;

[0073] ③According to the molar ratio...

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Abstract

The invention belongs to the technical field of photoelectricity, and particularly relates to a solid-state perovskite cluster and a preparation method thereof and a photoelectric device. The preparation method of the solid-state perovskite cluster comprises the following steps: preparing a precursor solutionfrom organic carboxylic acid, an organic amine ligand and a perovskite raw material; mixing the precursor solution with an anti-solvent to obtain a perovskite cluster solution with a passivated surface; and adding a shell forming substance into the perovskite cluster solution to form a shell layer on the surface of the perovskite cluster, and separating to obtain the solid-state perovskite cluster with the core-shell structure. According to the preparation method of the solid-state perovskite cluster, organic carboxylic acid and an organic amine ligand are added into a precursor solution, and a shell layer is formed on the surface of the perovskite cluster, so that the perovskite cluster can be separated and separated out in a solid state, and the perovskite cluster has the stability of resisting external environmental factors such as water and oxygen, and the application prospect of the perovskite cluster in photoelectric devices is improved.

Description

technical field [0001] The application belongs to the field of photoelectric technology, and in particular relates to a solid perovskite cluster and a preparation method thereof, and a photoelectric device. Background technique [0002] Nanoclusters are relatively stable microscopic or submicroscopic aggregates of atoms or molecules bonded together by physical or chemical forces. Because of its small size and surface plasticity, it has become a research hotspot in the fields of self-assembly materials, optoelectronic devices, biomarkers, medical treatment and solar cells. The morphology of nanoclusters has a great influence on its electronic structure and optical properties. By adjusting the microstructure of semiconductor nanoclusters, materials with specific properties can be designed. At the same time, nanoclusters can be used as building blocks, and superstructure materials with good symmetry and geometry can be prepared through conventional chemical routes or other sel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02
CPCC09K11/02C09K11/664B82Y20/00B82Y30/00B82Y40/00Y02E10/549
Inventor 薛冬峰徐珂王晓明
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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