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Lead iodide material with controllable shape and preparation method of lead iodide material

A lead iodide and morphology technology, applied in lead halide and other directions, can solve problems such as affecting the photoelectric conversion performance of perovskite materials, and achieve the effects of convenient operation, simple process and uniform size distribution

Pending Publication Date: 2018-08-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in PbI 2 To MAPbI 3 During the transition of perovskite materials, PbI 2 The presence of surfactant molecules greatly affects the photoelectric conversion performance of the final perovskite material

Method used

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  • Lead iodide material with controllable shape and preparation method of lead iodide material
  • Lead iodide material with controllable shape and preparation method of lead iodide material
  • Lead iodide material with controllable shape and preparation method of lead iodide material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Prepare the acetic acid solution of lead acetate: 1.14g (3mmol) lead acetate trihydrate is dissolved in acetic acid aqueous solution, and the mass fraction of acetic acid aqueous solution is 5%, stirs 10 minutes and fully dissolves, obtains 0.1mol / L lead acetate aqueous solution.

[0028] (2) Preparation of potassium iodide aqueous solution: Dissolve 0.5 (3 mmol) potassium iodide in 5 mL of deionized water, and ultrasonically dissolve it completely for 5 minutes to obtain potassium iodide solution.

[0029] (3)PbI 2 Preparation of materials: the potassium iodide solution in step (2) was added dropwise to the lead acetate solution in step (1), and stirred for 10 minutes after completion. Then the solution was transferred to a 50mL reactor, and placed at 120°C for 8 hours. Centrifuge and wash with deionized water until neutral, vacuum-dry at 80°C after vacuum filtration to obtain PbI 2 Material.

[0030] figure 1 Among (a) and (f) are the PbI prepared according to...

Embodiment 2

[0038] (1) Prepare the acetic acid solution of lead acetate: lead acetate trihydrate is dissolved in the acetic acid aqueous solution, the acetic acid aqueous solution mass fraction is 10%, stirs 10 minutes and fully dissolves, obtains the lead acetate aqueous solution, the concentration scope is in the 0.086mol / L scope.

[0039] (2) Preparation of potassium iodide aqueous solution: 0.5 g (3 mmol) of potassium iodide was dissolved in 5 mL of deionized water, and ultrasonically dissolved for 5 minutes to obtain a potassium iodide solution.

[0040] (3)PbI 2 Preparation of materials: the potassium iodide solution in step (2) was added dropwise to the lead acetate solution in step (1), and stirred for 10 minutes after completion. Then the solution was transferred to a 50mL reactor, and placed at 120°C for 8 hours. Centrifuge and wash with deionized water until neutral, vacuum filter and dry at 80°C to obtain PbI 2 Material.

[0041] figure 1 Middle (b) and (g) are the PbI pre...

Embodiment 3

[0045] (1) Prepare the acetic acid solution of lead acetate: lead acetate trihydrate is dissolved in the aqueous acetic acid solution, the mass fraction of the aqueous acetic acid solution is 20%, stir and dissolve fully for 10 minutes, obtain the aqueous lead acetate solution, the concentration range is within the scope of 0.12mol / L.

[0046] (2) Preparation of potassium iodide aqueous solution: 0.5 g (3 mmol) of potassium iodide was dissolved in 5 mL of deionized water, and ultrasonically dissolved for 5 minutes to obtain a potassium iodide solution.

[0047] (3)PbI 2 Preparation of materials: the potassium iodide solution in step (2) was added dropwise to the lead acetate solution in step (1), and stirred for 10 minutes after completion. Then the solution was transferred to a 50mL reactor, and placed at 120°C for 8 hours. Centrifuge and wash with deionized water until neutral, vacuum filter and dry at 80°C to obtain PbI 2 Material.

[0048] figure 1 Middle (c) and (h) a...

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Abstract

The invention relates to a preparation method of a lead iodide material with a controllable shape. The preparation method comprises the following steps: dissolving lead acetate trihydrate in an acidicaqueous solution to obtain a lead acetate aqueous solution, then dropwise adding a potassium iodide solution into the lead acetate aqueous solution, then transferring the mixed solution into a polytetrafluoroethylene reaction kettle to be sealed, reacting for 8 to 16 hours at 80 to 120 DEG C to obtain a lead iodide material. The process is simple, the reaction condition is mild, the operation isconvenient, by adjusting the content of acid, the particle size of a prepared PbI2 material can be adjusted in a range of 1 to 60 micrometers, the distribution range of the particle size can be effectively controlled, and the particle shape, i.e. a ratio of a surface {001} to a surface {101} can be effectively controlled. A micelle particle size of a PbI2 colloidal solution prepared from the PbI2material of different shapes and sizes is in a range of 100 to 1000 nm, and the distribution range of the micelle particle size is adjustable. The shape of a PbI2 film prepared by using a solution spin-coating method can be effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials and relates to a PbI 2 The preparation method of the material particularly relates to a lead iodide material with controllable morphology and a preparation method thereof. Background technique [0002] It is generally believed that the properties of a material not only depend on the chemical composition of the material, but also on its structure, phase, size, shape, size distribution and dimension [Angew.Chem.Int.Ed., 2008, 47(29): 5292-5304]. Controlling the anisotropy of inorganic or organic materials at the microscopic scale is the most challenging frontier topic in the field of materials. In the past few years, researchers have developed a variety of synthetic methods to prepare various materials Structure [Chem. Rev., 2005, 105(4): 1025-1102]. [0003] PB 2 It is a unique wide bandgap semiconductor with a bandgap width of 2.3-2.55eV and high relative molecular mass and resisti...

Claims

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Application Information

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IPC IPC(8): C01G21/16
CPCC01G21/16C01P2004/51C01P2004/61
Inventor 冉晨鑫汪敏强高蔚茵
Owner XI AN JIAOTONG UNIV
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