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Methylamine lead halide compound single crystal micro-flake growth method and growth device

A technology of methylamine halide plumbate compound and growth method, which is applied in the field of growth method and growth device of large-size single-crystal micro-sheets of methylamine halide plumbate compound, and can solve the problems of difficult separation, small two-dimensional size, and high brittleness and other problems, to achieve the effect of smooth surface and complete structure

Inactive Publication Date: 2018-02-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has a large number of defects such as grain boundaries, intermediates, and holes, which generate high-density charge defects and lead to an increase in the amount of charge recombination. influence, and then affect the photoelectric conversion efficiency of the prepared solar cell device; the latter has little practical significance for the preparation and performance improvement of the device because the two-dimensional size is too small and mostly exists in the liquid phase or is agglomerated together and is not easy to separate.
On the other hand, although large-sized single crystals have been grown, their quality needs to be improved, and their mechanical properties are poor, their hardness is low, and their brittleness is high, so it is difficult to process them into thin slices with small thickness, so that it is impossible to realize top-down Fabrication of Single Crystal Flake Related Devices

Method used

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  • Methylamine lead halide compound single crystal micro-flake growth method and growth device
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  • Methylamine lead halide compound single crystal micro-flake growth method and growth device

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Embodiment 1

[0040] A growth device for monocrystalline microflakes of methylamine halide lead salt compound, comprising a temperature-controlled growth device 1 and an airtight device 2, the airtight device 2 is arranged in the temperature-controlled growth device 1, and the temperature-controlled growth device 1 is provided with a vacuum device and an inert gas inlet device; the sealing device 2 is also provided with an accessory 4 that can adjust the angle with the horizontal plane.

[0041] The airtight container described in this embodiment is an airtight glass device.

Embodiment 2

[0043] A method for growing methylamine halide lead salt compound single crystal microflakes, using the device described in Example 1, comprising steps as follows:

[0044] (1) CH 3 NH 3 PbBr 2 The polar organic solution of I is dripped onto the substrate, and then a cover sheet of the same material as the substrate is pressed on, and after bonding, the solution is spread on the substrate to obtain a growth body 3;

[0045](2) Place the growth body 3 on the accessory 4 that can adjust the angle with the horizontal plane in the airtight device 2, the angle between the growth body 3 and the horizontal plane is θ=45°, and then place it in the temperature-controlled growth device 1, and control the temperature The growth device 1 was evacuated and filled with inert gas nitrogen, and grown for 20 days at a temperature of 50° C. in a nitrogen atmosphere to obtain methylamine bromide lead iodide compound single crystal micron flakes.

[0046] CH in this example 3 NH 3 PbBr 2 Th...

Embodiment 3

[0051] A method for growing methylamine halide lead salt compound single crystal microflakes, using the device described in Example 1, comprising steps as follows:

[0052] (1) CH 3 NH 3 PbBr 3 Add the polar organic solution dropwise onto the substrate, and then press a cover sheet of the same material as the substrate, and spread the solution on the substrate after bonding to obtain the growth body 3;

[0053] (2) Place the growth body 3 on the accessory 4 in the airtight device 2 that can adjust the angle with the horizontal plane, the angle between the growth body 3 and the horizontal plane is θ=60°, then place it in the temperature-controlled growth device 1, and turn on the temperature control The vacuum device of the growth device 1 is adjusted to a vacuum degree of -90KPa, and grown at a temperature of 70° C. in a vacuum atmosphere for 5 days to obtain a single-crystal microflake of methylamine bromide lead salt compound.

[0054] CH in this example 3 NH 3 PbBr 3 ...

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Abstract

The invention relates to a growing method of a methylamine halogenated plumbate compound single-crystal micron chip and a growing device. The growing method comprises steps as follows: (1), a polar organic solution of CH3NH3PbX3 (X represents Cl, Br and I) is dropwise added to a substrate, then a cover plate made of the same material as the substrate is pressed on the substrate, the solution is spread on the substrate after the cover plate and the substrate are attached, and a growing body is obtained; (2), the growing body is put in a sealed container and grows for 3-20 days at the temperature of 40-70 DEG C in vacuum or inert atmosphere, and a product is obtained. The growing device comprises a temperature control growing device and an airtight device arranged in the temperature control growing device, and the temperature control growing device is provided with a vacuum pumping device and an inert gas inlet device. The prepared micron chip is a single crystal, is complete in structure, has flat surface and avoids crystal boundaries, intermediates and defects.

Description

technical field [0001] The invention relates to a growth method and a growth device of an organic-inorganic compound semiconductor single crystal micro-flake material, in particular to a growth method and a growth device of a large-sized single crystal micro-flake of a methylamine halide lead salt compound, and belongs to the technical field of crystal materials. Background technique [0002] Methylamine halide lead salt compound (chemical formula: CH 3 NH 3 wxya 3 , X=Cl, Br, I) Since it was used in the photovoltaic field in 2009 and achieved a photoelectric conversion efficiency of 3.8%, with its ultra-long carrier transport distance, long carrier lifetime, high carrier Mobility, strong optical absorption in a broad spectral range, direct bandgap, and low cost have rapidly attracted extensive attention from researchers. In just five years, in the field of photovoltaics, the photoelectric conversion efficiency of solar cells prepared using this material has jumped to mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/54C30B7/00
CPCC30B7/005C30B29/54
Inventor 陶绪堂殷建
Owner SHANDONG UNIV