High-stability water-soluble CsPbX3 perovskite nano-crystalline preparation method

A high-stability, perovskite technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as nanocrystal instability, and achieve the effect of simple and adjustable operation

Inactive Publication Date: 2017-11-24
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the currently prepared organic and inorganic perovskite nanocrystals

Method used

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  • High-stability water-soluble CsPbX3 perovskite nano-crystalline preparation method
  • High-stability water-soluble CsPbX3 perovskite nano-crystalline preparation method
  • High-stability water-soluble CsPbX3 perovskite nano-crystalline preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, add 0.01 g (1 mL) of water-soluble polystyrene microspheres (0.1 to 10 microns in size) into 10 mL of ethanol, and disperse them further by ultrasonication for 30 minutes to obtain a homogeneous solution, followed by centrifugation to redisperse the precipitate in hexane After sonicating for 2 hours, the solution was centrifuged again to obtain a precipitate of polystyrene microspheres.

[0026] Then the prepared 5mL CsPbBr 3 Perovskite nanocrystal solution (containing 0.001mmol perovskite nanocrystal, diameter 4-12nm, solvent is toluene and ethane with a volume ratio of 1:10) was added to the polystyrene precipitate, ultrasonicated for 1 hour, and then stirred for 24 Hour. The solution is centrifuged to obtain composite particles of perovskite and polystyrene. The obtained particles were redispersed into a hexane solution, and the perovskite-supported polystyrene particles were obtained by precipitation and redispersed into hexane. Finally, the as-prepared pr...

Embodiment 2

[0028] First, add 0.01 g (1 mL) of water-soluble polystyrene microspheres (0.1 to 10 microns in size) into 10 mL of ethanol, and disperse them further by ultrasonication for 30 minutes to obtain a homogeneous solution, followed by centrifugation to redisperse the precipitate in hexane Post-sonic for 2 hours. The solution was centrifuged again to obtain a pellet of polystyrene microspheres.

[0029] Then the prepared 5mL CsPbBr 3 The perovskite nanocrystal solution (containing 0.002mmol perovskite nanocrystal, diameter 4-12nm, solvent is toluene and ethane with a volume ratio of 1:4) was added to the polystyrene precipitate, ultrasonicated for 1 hour, and then stirred for 24 Hour. Finally, the solution was centrifuged to obtain composite particles of perovskite and polystyrene. The obtained particles were redispersed into a hexane solution, and the perovskite-supported polystyrene particles were obtained by precipitation and redispersed into hexane. Finally, the prepared pr...

Embodiment 3

[0031] First, add 0.02g (1mL) of water-soluble polymethylmethacrylate microspheres (0.1-10 microns in size) into 10mL of ethanol, and disperse further by ultrasonication for 30 minutes to obtain a homogeneous solution, followed by centrifugation to redisperse the precipitate into Post-sonicate in hexane for 2 hours. The solution was centrifuged again to obtain precipitates of polymethyl methacrylate microspheres.

[0032] Then the prepared 5mL CsPb(Br / Cl) 3 Perovskite nanocrystal solution (containing 0.001mmol perovskite nanocrystal, with a diameter of 4-12nm, and the solvent is toluene and ethane with a volume ratio of 1:4) was added to the polymethyl methacrylate precipitation, ultrasonicated for 1 hour, and then 24 hours under stirring. The solution is centrifuged to obtain composite particles of perovskite and polymethyl methacrylate. The obtained particles were redispersed in hexane solution, and then dispersed in hexane to obtain perovskite-supported polymethyl methac...

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Abstract

The invention discloses a high-stability water-soluble CsPbX3 perovskite nano-crystalline preparation method, and belongs to the technical field of semiconductor nano-material preparation. Water-soluble polymer particles are dispersed in hexane solvents by a solvent exchange method and then centrifuged to obtain polymer micro-sphere precipitates, CsPbX3 perovskite nano-crystalline dispersed in methylbenzene and hexane mixed solvents is mixed with the polymer micro-sphere precipitates for 24 hours, and perovskite nano-crystalline supported polymer particles are obtained by centrifugation. The polymer-supported perovskite nano-crystalline prepared by the preparation method can be dispersed in water solution, has high stability under different pH (potential of hydrogen) conditions, and the water-soluble nano-particles with fluorescence in a visible region and high fluorescence quantum efficiency are obtained by preparing different perovskite particles and have huge application values in the fields of bio-imaging, display and the like.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanomaterial preparation and relates to a highly stable water-soluble CsPbX 3 (X=Cl, Br, I) Synthetic method of perovskite nanocrystals. Background technique [0002] After the semiconductor material is gradually reduced from the bulk phase to a certain critical size (1-20 nanometers), the volatility of the carriers becomes significant, and the movement will be limited, resulting in an increase in kinetic energy. The corresponding electronic structure is continuous from the bulk phase to The energy level structure becomes a quasi-split discontinuity, a phenomenon known as the quantum size effect. The more common semiconductor nanoparticles, that is, quantum dots, mainly include II-VI, III-V and IV-VI groups. These types of quantum dots are well obeyed by the quantum size effect, and their properties change regularly with the size, for example, the absorption and emission wavelengths change...

Claims

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Application Information

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IPC IPC(8): C01G21/00C09K11/66B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G21/006C01P2004/01C09K11/665
Inventor 解仁国王迪彭路成汪大洋杨文胜
Owner JILIN UNIV
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