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Preparation method of perovskite material powder

A technology of perovskite materials and perovskite powders, which is applied in the preparation of amino compounds from amines, semiconductor/solid-state device manufacturing, electric solid-state devices, etc., and can solve the problems of adapting to rapid mass industrial production, long-term heating or stirring , It is difficult to solve the problems of removing impurities, etc., to achieve the effect of facilitating mass industrial production, wide applicability, and low equipment cost

Pending Publication Date: 2021-12-28
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the main synthesis methods of perovskite powder include mechanical ball milling method and wet chemical method. Mechanical ball milling method can realize large-scale synthesis of materials, but it is difficult to remove impurities in raw materials, and the uniformity of the synthesized powder is poor; the existing chemical wet method Including single crystal synthesis and powder synthesis, these solutions require long-term heating or stirring processes, which are difficult to adapt to rapid mass industrial production

Method used

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  • Preparation method of perovskite material powder
  • Preparation method of perovskite material powder
  • Preparation method of perovskite material powder

Examples

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Embodiment 1

[0036] Low-purity raw material 1.5mmol MAI (methylamine hydroiodide, CH 3 NH 3 I, purity 98%) and 1.5mmol PbI 2 (lead iodide, purity 98%) was dissolved in 1 ml of ethylene glycol methyl ether solvent, and stirred continuously for 1 h to obtain a mixed solution, which was then filtered and transferred to a small beaker. Inject 2ml of ether into the beaker, stir for 30 seconds, and precipitate black perovskite crystallite precipitate MAPbI at the bottom of the beaker 3 . Precipitate MAPbI from the precipitated perovskite crystallites 3 Use ether to wash 3 times, and remove the residual ether by vacuum drying at room temperature to obtain the perovskite material powder MAPbI of this embodiment 3 , and the calculated yield was 93%.

[0037] The perovskite material powder MAPbI that the present embodiment makes 3 Photos and XRD diffraction patterns such as figure 2 shown. The XRD pattern shows that the perovskite material powder is a single crystal form without impurity ph...

Embodiment 2

[0039] Low-purity raw material 1.5mmol FAI (formamidine hydroiodide, NH 2 CHNH 2 I, purity 98%) and 1.5mmolPbI 2 (lead iodide, purity 98%) was dissolved in 1 ml of ethylene glycol methyl ether solvent, and stirred continuously for 1 h to obtain a mixed solution, which was then filtered and transferred to a small beaker. Inject 2ml of ether into the beaker, stir for 30 seconds, and precipitate yellow perovskite crystallite precipitate FAPbI at the bottom of the beaker 3 . Precipitate FAPbI from the precipitated perovskite crystallites 3 Use diethyl ether to wash 3 times, and remove residual diethyl ether by room temperature vacuum drying, obtain the perovskite material powder FAPbI of this embodiment 3 (delta phase), calculated yield 90%.

[0040] The perovskite material powder FAPbI that the present embodiment makes 3 The XRD diffraction peak position of the photo is as Figure 4 shown. The XRD pattern shows that the perovskite material powder is a single crystal δ pha...

Embodiment 3

[0042] Low-purity raw material 1.5mmol MAI (methylamine hydroiodide, CH 3 NH 3 I, purity 98%) and 1.5mmol PbI 2 (lead iodide, purity 98%) was dissolved in 1 ml of γ-butyrolactone solvent, and stirred continuously for 1 h to obtain a mixed solution, which was then filtered and transferred to a small beaker. Inject 2ml of ether into the beaker, stir for 30 seconds, and precipitate black perovskite crystallite precipitate MAPbI at the bottom of the beaker 3 . Precipitate MAPbI from the precipitated perovskite crystallites 3 Use ether to wash 3 times, and remove the residual ether by vacuum drying at room temperature to obtain the perovskite material powder MAPbI of this embodiment 3 , and the calculated yield was 90%.

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Abstract

The invention relates to a preparation method of perovskite material powder. The method mainly comprises the following steps of: mixing a component 1 and a component 2, dissolving in a good solvent A, fully stirring and filtering to obtain a mixed precursor solution, adding an anti-solvent B into the mixed precursor solution, rapidly stirring until perovskite microcrystal precipitate is generated, cleaning the precipitate, and carrying out vacuum drying to obtain perovskite material powder. According to the preparation method disclosed by the invention, high-purity and impurity-phase-free perovskite material powder can be synthesized by using low-purity raw materials and is used for preparing various efficient film devices; and the technological process is simple and rapid, high-temperature heating is not needed, and high-flux industrial synthesis is facilitated.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing perovskite material powder. Background technique [0002] Perovskite materials have the characteristics of flexible composition, high light absorption coefficient, variable band gap, high carrier mobility and long diffusion distance, and have been widely used in solar cells, photodetectors and light-emitting diodes. At present, the efficiency of perovskite solar cells (perovskite solar cells, PSCs) has reached 25%, surpassing the traditional polycrystalline silicon solar cells. [0003] In the preparation process of perovskite solar cells, there are impurities substituted by raw materials in the perovskite precursor solution, which seriously affects the device efficiency, and the high cost of purifying raw materials alone limits the commercial application of perovskite devices. At the same time, the stoichiometric deviation generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/04C07C209/68C07C257/12H01L51/46
CPCC07C209/68C07C257/12H10K85/60C07C211/04
Inventor 孙盟杰郑毅帆史亦沣张国栋邵宇川
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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