Preparation method of large-size and high-quality two-dimensional halide perovskite single crystal

A halide perovskite and perovskite technology, applied in the field of materials and chemical synthesis, can solve problems such as crystal voids or wrinkles, imperfections, etc., and achieve the effect of low cost and quality improvement

Pending Publication Date: 2022-04-26
WENZHOU ADVANCED MFG TECH INST OF HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current methods for growing high-quality, large-scale two-dimensional perovskite single crystals are not perfect, "Journal of Materials Chemistry C2019, 7(6), 1584-1591" and "RSCAdvances 2019, 9(29), 16779-16783 2D PEA was grown by volatile solvent method in 2 PbBr 4 Single crystal, but the grown crystals have obvious voids or wrinkles

Method used

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  • Preparation method of large-size and high-quality two-dimensional halide perovskite single crystal
  • Preparation method of large-size and high-quality two-dimensional halide perovskite single crystal
  • Preparation method of large-size and high-quality two-dimensional halide perovskite single crystal

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] Example 1: Weigh 2.3038g PEABr and 4.1839g PbBr 2 (1:1 molar ratio) in 10ml N,N-dimethylformamide, after completely dissolving, filter the solution and transfer to a 25ml glass beaker. After putting on tin foil, use a 5ml syringe to pierce 6 small holes on the tin foil, place it at room temperature to volatilize, and there will be PEA within 2 weeks 2 PbBr 4 Crystals precipitated. Filter the solution into a new clean 25ml small beaker, add the precipitated crystals as seeds, seal the beaker with tin foil, and tie the tin foil to the outside of the beaker with tape, and place the whole in a constant temperature oven at 35°C for heating . After 5 minutes, close the oven, and 1 day later, use a 5ml syringe to pierce a small hole in the tin foil to make the solvent evaporate slowly, and the seed crystals continue to grow. One month later, the crystals (grown seed crystals) were taken out with tweezers, dried with dust-free paper, rinsed with chlorobenzene, dried in a va...

example 2

[0030] Example 2: Weigh 2.3038g PEABr and 4.1839g PbBr 2 (1:1 molar ratio) in 10ml dimethyl sulfoxide, after completely dissolving, filter the solution and transfer to a 25ml glass beaker. Put it in a constant temperature oven at 50°C to volatilize, and there will be PEA within 2 weeks 2 PbBr 4 Crystals precipitated. Filter the solution into a new clean 25ml small beaker, add the precipitated crystals as seeds, seal the beaker with tin foil, and tie the tin foil to the outside of the beaker with tape, and place the whole in a constant temperature oven at 100°C for heating . After 1 minute, change the set temperature of the oven to 50°C. After 1 day, use a 5ml syringe to pierce a small hole in the tin foil to make the solvent evaporate slowly, and the seed crystals continue to grow. One month later, the crystals (grown seed crystals) were taken out with tweezers, dried with dust-free paper, rinsed with chlorobenzene, dried in a vacuum oven for 12 hours, and stored in the da...

example 3

[0031] Example 3: Weigh 13.9335g BIBr and 2.5691g PbBr 2 (10:1 molar ratio) in 10ml N,N-dimethylformamide, after completely dissolving, filter the solution and transfer to a 50ml glass beaker. Put it in a constant temperature oven at 50°C to volatilize, and there will be BI within 2 weeks 2 PbBr 4 Crystals precipitated. Filter the solution into a new clean 50ml small beaker, add the precipitated crystals as seeds, seal the beaker with tin foil, and tie the tin foil to the outside of the beaker with tape, and place the whole in a constant temperature oven at 100°C for heating . After 1 minute, change the set temperature of the oven to 50°C. After 1 day, use a 1ml syringe to pierce a small hole in the tin foil to make the solvent evaporate slowly, and the seed crystals continue to grow. One month later, the crystals (grown seed crystals) were taken out with tweezers, dried with dust-free paper, rinsed with diethyl ether, dried in a vacuum oven for 12 hours, and stored in the...

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Abstract

The invention relates to a preparation method of a large-size and high-quality two-dimensional halide perovskite single crystal, the molecular formula of the two-dimensional halide perovskite is A2PbX4 or BPbX4, A represents one or more of PEA (phenylethylamine), BI (benzimidazole), propylamine, BA (butylamine) and PA (pentylamine), B represents one or more of propane diamine, BDA (butanediamine), PDA (pentamethylene diamine) and p-xylylenediamine, and X represents one or more of F, Cl, Br and I. A seed crystal induced volatile solvent method is utilized, and the two-dimensional perovskite single crystal with large size and high quality can be obtained under room-temperature or constant-temperature volatilization by heating and dissolving at the initial stage of seed crystal addition. According to the method, the solution can be recycled, the requirements on equipment and energy consumption are low, and the large-size and high-quality two-dimensional perovskite single crystal can be obtained at low cost.

Description

technical field [0001] The invention relates to the field of materials and chemical synthesis, in particular to a two-dimensional halide perovskite single crystal material and a preparation method thereof. Background technique [0002] Perovskite materials have excellent optoelectronic properties, and crystals have better optoelectronic properties because they have fewer grain boundaries and defects than polycrystalline ones. However, the poor stability of three-dimensional perovskite single crystals has become a key factor limiting their practical applications. Compared with three-dimensional perovskite single crystals, two-dimensional perovskite single crystals have become a research hotspot due to their higher stability. However, the current methods for growing high-quality, large-scale two-dimensional perovskite single crystals are not perfect, "Journal of Materials Chemistry C2019, 7(6), 1584-1591" and "RSCAdvances 2019, 9(29), 16779-16783 2D PEA was grown by volatile...

Claims

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Application Information

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IPC IPC(8): C30B29/12C30B7/06C30B7/14
CPCC30B29/12C30B7/06C30B7/14
Inventor 徐凌唐江牛广达谢作想熊焱
Owner WENZHOU ADVANCED MFG TECH INST OF HUAZHONG UNIV OF SCI & TECH
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