Zero-dimensional zinc-based halide luminescent material and preparation method thereof

A luminescent material, zero-dimensional zinc technology, applied in luminescent materials, chemical instruments and methods, climate sustainability, etc., can solve problems such as low luminous efficiency, and achieve high luminous efficiency, high crystallinity, and air stability. Effect

Active Publication Date: 2022-05-31
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminescence efficiency of most low-dimensional zinc-based halides is very low

Method used

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  • Zero-dimensional zinc-based halide luminescent material and preparation method thereof
  • Zero-dimensional zinc-based halide luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Weigh 3 mmol of CsCl, 0.99 mmol of ZnCl 2 , 0.005 mmol of CuCl, 0.005 mmol of AlCl 3 , pour it into a 25ml polytetrafluoroethylene reactor lining, add 3ml methanol, stir for at least 30min, mix the reaction materials evenly, add 0.05ml oleylamine, continue stirring for 10min, take out the stirring bar. With the reactor seal that contains above-mentioned reaction raw material, it is put into 180 o C in the blast oven, heat preservation for 12 h. After the reaction, when the reaction kettle was naturally lowered to room temperature, the reaction kettle was opened, the supernatant was discarded, 4ml of n-butanol solution was added and washed by centrifugation at 8000 rpm for 2 min, and the washing was repeated twice, then the n-butanol was replaced with Use the same washing method as n-hexane to wash once. Place the washed samples at 60 o C dried in a vacuum oven for 12 hours, and after the temperature dropped to room temperature, the samples were collected in reagent ...

Embodiment 2

[0048] Weigh 3 mmol of CsCl, 0.95 mmol of ZnCl 2 , 0.025 mmol of CuCl, 0.025 mmol of AlCl 3 , pour it into a 25ml polytetrafluoroethylene reactor lining, add 3ml methanol, stir for at least 30min, mix the reaction materials evenly, add 0.25ml oleylamine, continue stirring for 10min, take out the stirring bar. With the reactor seal that contains above-mentioned reaction raw material, it is put into 180 o C in the blast oven, heat preservation for 12 h. After the reaction, when the reaction kettle was naturally lowered to room temperature, the reaction kettle was opened, the supernatant was discarded, 4ml of n-butanol solution was added and washed by centrifugation at 8000 rpm for 2 min, and the washing was repeated twice, then the n-butanol was replaced with Use the same washing method as n-hexane to wash once. Place the washed samples at 60 o C dried in a vacuum oven for 12 hours, and after the temperature dropped to room temperature, the samples were collected in reagent ...

Embodiment 3

[0050] Weigh 3 mmol of CsCl, 0.9 mmol of ZnCl 2 , 0.05 mmol of CuCl, 0.05 mmol of AlCl 3 , pour it into a 25ml polytetrafluoroethylene reactor lining, add 3ml methanol, stir for at least 30min, mix the reaction materials evenly, add 0.5ml oleylamine, continue stirring for 10min, take out the stirring bar. With the reactor seal that contains above-mentioned reaction raw material, it is put into 180 o C in the blast oven, heat preservation for 12 h. After the reaction, when the reaction kettle was naturally lowered to room temperature, the reaction kettle was opened, the supernatant was discarded, 4ml of n-butanol solution was added and washed by centrifugation at 8000 rpm for 2 min, and the washing was repeated twice, then the n-butanol was replaced with Use the same washing method as n-hexane to wash once. Place the washed samples at 60 o C dried in a vacuum oven for 12 hours, and after the temperature dropped to room temperature, the samples were collected in reagent bott...

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Abstract

The invention discloses a zero-dimensional zinc-based halide luminescent material and a preparation method thereof, the zero-dimensional zinc-based halide luminescent material is a Cu < + > and B < 3 + > co-doped Cs3ZnCl5 material, Cu < + > and B < 3 + > are doped into Cs3ZnCl5 crystal lattices and replace Zn crystal lattice sites, the total doping amount is 1%-10% of the stoichiometric ratio of Zn in the Cs3ZnCl5 crystal structure, the doping concentration of Cu < + > is equal to that of B < 3 + >, and B is selected from any one of Al and Ga. The metal halide material is obtained by adopting a solvothermal method or a solid-phase reaction method, and can emit bright cyan light under the irradiation of ultraviolet light; the co-doping of Cu < + > and B < 3 + > not only inhibits the oxidation of Cu < + > due to a charge compensation effect, but also reduces the symmetry of a [CuCl4] < 3-> tetrahedron by triggering local lattice distortion, improves the radiative recombination probability of self-trapping excitons (STEs), and further improves the luminous efficiency of the material.

Description

technical field [0001] The invention belongs to the technical field of inorganic semiconductor luminescent materials, and in particular relates to the design, synthesis and performance optimization of a zero-dimensional zinc-based halide luminescent material. Background technique [0002] Recently, zero-dimensional metal halides have attracted extensive attention in the scientific community due to their special electronic and optical properties. Among these materials, some highly efficient luminescent materials with a photoluminescence quantum yield close to 100% have been found (J. Phys. Chem. C 2020, 124, 20469−20476), and there are also other chemical components with slightly different Different materials of the same type but their PLQY is extremely low (Chem. Mater. 2019, 31, 10161−10169). The luminescence of zero-dimensional metal halides mainly comes from typical self-limited excitons (STEs), and its luminous efficiency is closely related to the isolated metal halide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61
CPCC09K11/628C09K11/644Y02B20/00
Inventor 耿冬苓隽志立曾海波
Owner NANJING UNIV OF SCI & TECH
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