Zero-dimensional lead-free perovskite fluorescent material as well as preparation and application thereof

A dimensional lead-free perovskite and fluorescent material technology, applied in luminescent materials, electrical components, circuits, etc., can solve the problems of inert environment, high-purity raw materials, high temperature and high pressure, etc., and achieve high fluorescence quantum yield and wide luminescence. Spectral, low-cost effects

Active Publication Date: 2020-04-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods for preparing 0D lead-free perovskites have their own shortcomings, such as time-consuming, inert environment, high temperature and high pressure, high-purity raw materials, etc.

Method used

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  • Zero-dimensional lead-free perovskite fluorescent material as well as preparation and application thereof
  • Zero-dimensional lead-free perovskite fluorescent material as well as preparation and application thereof
  • Zero-dimensional lead-free perovskite fluorescent material as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 0.2982g of KCl powder, 0.0990g of CuCl powder and 0.0584g of NaCl powder into the ball milling tank, then add 3mL of absolute ethanol and 2g of ball milling beads, set the ball milling speed to 1200r / min, and mill at room temperature for 7h, The solid-liquid separation was carried out by centrifugation, and the collected solid was dried at 80°C for 5 hours to obtain the zero-dimensional lead-free perovskite fluorescent material K 2 Cu 0.5 Na 0.5 Cl 3 , the excitation peak is 280nm, the emission peak is 386nm, and has a large Stokes shift, such as figure 2 shown.

Embodiment 2

[0024] Weigh 0.2982g of KCl powder, 0.1584g of CuCl powder and 0.0234g of NaCl powder into the ball milling tank, then add 3mL of absolute ethanol and 3g of ball milling beads, set the ball milling speed to 1500r / min, and mill at room temperature for 3h, The solid-liquid separation was carried out by centrifugation, and the collected solid was dried at 70°C for 4 hours to obtain the zero-dimensional lead-free perovskite fluorescent material K 2 Cu 0.8 Na 0.2 Cl 3 , the excitation peak is 280nm, the emission peak is 386nm, and has a large Stokes shift, such as figure 2 shown.

Embodiment 3

[0026]Weigh 0.2982g of KCl powder and 0.1980g of CuCl powder into the ball milling tank, then add 3mL of ethyl acetate and 4g of ball milling beads, set the ball milling speed to 1000r / min, after ball milling at room temperature for 10min, the solid-liquid Separation, and the collected solid was dried at 60°C for 3 hours to obtain the zero-dimensional lead-free perovskite fluorescent material K 2 CuCl 3 , the excitation peak is 280nm, the emission peak is 386nm, and has a large Stokes shift, such as figure 2 shown. from figure 1 It can be seen from the XRD spectrum in the figure that there is K in the solid matter after ball milling 2 CuCl 3 crystals.

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Abstract

The invention relates to a zero-dimensional lead-free perovskite fluorescent material as well as preparation and application thereof, and belongs to the technical field of lead-free perovskite fluorescent materials and luminescence application. The fluorescent material is KxCuyNa1-yCl1 + x, x is larger than 0 and smaller than or equal to 10, y is larger than 0 and smaller than or equal to 1, and the fluorescent material KxCuyNa1-yCl1 + x has the advantages of being high in fluorescence quantum yield, large in Stokes shift, low in cost and the like and can serve as an ultraviolet light-emittingmaterial to be applied to electroluminescent devices. And a ball-milling solid-phase reaction method is adopted for preparation, operation is easy, reaction time is short, and the method is suitablefor batch production.

Description

technical field [0001] The invention relates to a zero-dimensional lead-free perovskite fluorescent material, its preparation and application, and belongs to the technical field of lead-free perovskite fluorescent materials and light-emitting applications. Background technique [0002] Halogen perovskites have attracted great attention due to their important applications in fields such as solar cells and light-emitting diodes. The perovskite material has an adjustable band gap, and its spectrum can cover the near-infrared and visible light spectral regions, making it suitable for applications in the fields of high-efficiency light-emitting diodes and lasers. However, the vast majority of high-performance perovskite materials are based on lead-containing toxic materials, which have potentially harmful effects on the environment. In addition, the poor stability of lead-containing perovskite materials and their devices is a stumbling block hindering their industrialization. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61H01L33/50
CPCC09K11/616H01L33/502
Inventor 陈冰昆王涌天刘越张法赵子恒
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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