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Method for preparing lead halide perovskite

A perovskite and mother liquor technology, applied in chemical instruments and methods, lead compounds, inorganic chemistry, etc., can solve problems such as lack of extensive attention and research, limited applications, etc., to avoid difficult operation, diverse three-dimensional structures, and economical preparation methods Effect

Active Publication Date: 2019-12-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of composition and structure, the application of this mineral material is limited, and it has not been widely concerned and studied.

Method used

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  • Method for preparing lead halide perovskite
  • Method for preparing lead halide perovskite
  • Method for preparing lead halide perovskite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation process of Pb(OH)Br is as follows figure 1 Shown in b: (1) At room temperature, weigh 4 parts of 0.1101g PbBr 2 powder, respectively dissolved in 1.5ml N,N-dimethylformamide (DMF), after vigorously stirring for 3min, the solution was clear, respectively recorded as A1, B1, C1 and D1, and then added 150μl oleic acid (OA ), 10 μl oleylamine (OAM), add 75 μl oleic acid and 75 μl oleylamine to B1 in sequence, add 150 μl oleic acid and 75 μl oleylamine to C1 in sequence, add 150 μl oleic acid and 1000 μl oleylamine to D1 in sequence, and continue stirring A clear solution was obtained.

[0027] (2) Use a pipette to measure 1.4ml of the clear solutions of A1, B1, C1, and D1 in (1) above, and then quickly add them to 20ml of toluene, stir vigorously for 10min, and then let stand for 30 hours to obtain the mother liquor.

[0028] (3) Use high-speed centrifugation after transferring the mother liquor to centrifuge tubes respectively, the rotating speed is 7000r...

Embodiment 2

[0031] (1) At room temperature, weigh 0.1101g PbBr 2 Powder, dissolved in 1.5ml N,N-dimethylformamide (DMF). After vigorous stirring for 3 minutes, the solution was clear, and 150 μl of oleic acid and 75 μl of oleylamine were added in sequence, and the stirring was continued to obtain a clear solution.

[0032] (2) Use a pipette gun to measure 1.4ml of the above-mentioned clear solution, and then quickly add them to 20ml of toluene respectively, stir vigorously for 10s and then let stand for 20 hours to obtain the mother liquor.

[0033] (3) After transferring the mother liquor to a centrifuge tube, use high-speed centrifugation at a speed of 7000 rpm for 5 minutes. Then the precipitate was washed several times with toluene to obtain the diplococcus-like micron-sized Pb(OH)Br self-assembled material.

[0034] Scanning electron microscopy shows that the Pb(OH)Br self-assembled material prepared by the above method has a uniform shape and size distribution, such as figure 2 ...

Embodiment 3

[0036] (1) At room temperature, weigh 0.1101g PbBr 2 Powder, dissolved in 1.5ml N,N-dimethylformamide (DMF). After vigorous stirring for 3 minutes, the solution was clear, and 150 μl of oleic acid and 75 μl of oleylamine were added in sequence, and the stirring was continued to obtain a clear solution.

[0037] (2) Use a pipette gun to measure 1.4ml of the above-mentioned clear solution, and then quickly add it to 20ml of toluene, stir vigorously for 30s, and then let it stand for 1min, 1h, 3, 10h and 24h respectively to obtain the mother liquor.

[0038] (3) After transferring the mother liquor to a centrifuge tube, use high-speed centrifugation at a speed of 7000 rpm for 5 minutes. Then the precipitate was washed several times with toluene to obtain Pb(OH)Br self-assembled materials under different growth times.

[0039] The Pb(OH)Br self-assembled materials obtained in the above examples at different growth times were tested by scanning electron microscopy to observe in d...

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Abstract

The invention discloses a method for preparing lead halide perovskite, and belongs to the field of lead halide perovskite. According to the method, a self-assembly behavior of hydroxy halide lead oresare regulated and controlled through regulation and control of the composition of ligands, so that hydroxy halide lead ore structures with different micron-sized microscopic shapes can be obtained; and then, Cs<+>, CH3NH3<+> or HC(NH2)2<+> ions are introduced by taking the structures as lead sources and templates, and lead halide perovskite materials with different structures can be obtained. Themethod is economical, simple and reliable, and the prepared lead halide perovskite materials have various three-dimensional structures and adjustable components.

Description

technical field [0001] The invention belongs to the field of lead halide perovskite, and in particular relates to a preparation method of lead halide perovskite. Background technique [0002] In recent years, lead-based halide perovskites (APbX 3 ) has attracted extensive attention in the fields of solar cells, LEDs, and photodetectors due to its unique properties such as high quantum efficiency, adjustable band gap, and long carrier diffusion length. With the deepening of research, it has been found that lead halide perovskite micro-nano materials with three-dimensional complex structures have more fascinating physical properties, for example, CsPbBr 3 The micron-scale superlattice structure formed by stacking nanocubes has superfluorescence phenomenon. This discovery provides the possibility for the preparation of multi-photon entangled quantum light source. However, although researchers have proposed methods such as surface ligand confinement (soft template) and hard te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/00
CPCC01G21/006C01P2002/34C01P2002/72C01P2004/03C01P2004/61
Inventor 杨士宽余阳春侯嘉慧孙启升张玲惠
Owner ZHEJIANG UNIV
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