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a cs 4 pbbr 6 Zero-dimensional perovskite nanomaterials and their preparation methods and applications

A technology of nanomaterials and perovskite, which is applied in the direction of luminescent materials, chemical instruments and methods, semiconductor devices, etc., can solve problems such as the difficulty in discovering luminescent properties, and achieve the effects of easy control of synthesis conditions, uniform morphology, and huge development potential

Active Publication Date: 2021-12-14
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, structural locality also makes Cs 4 PbBr 6 The band gap of zero-dimensional perovskite nanomaterials cannot be compared with that of three-dimensional CsPbX 3 Perovskite nanomaterials can be effectively regulated by size or anion exchange, making it difficult to discover the excellent luminescent properties of the material

Method used

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  • a cs <sub>4</sub> pbbr <sub>6</sub> Zero-dimensional perovskite nanomaterials and their preparation methods and applications
  • a cs <sub>4</sub> pbbr <sub>6</sub> Zero-dimensional perovskite nanomaterials and their preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of blue-emitting Cs 4 PbBr 6 Zero-dimensional perovskite nanomaterials

[0038] (1) Weigh 0.4g of cesium carbonate, 1.5ml of oleic acid, and 15ml of octadecene at room temperature, and add them to a 100ml two-necked flask. 2 After stirring for 20 minutes, raise the temperature to 120°C and keep it warm for 1 hour until the cesium carbonate is completely dissolved, then raise the temperature to 150°C and keep it warm for 10 minutes, then lower the temperature. 2 Storage under the atmosphere, was cloudy.

[0039] (2) Weigh 0.0138g of lead bromide, 0.0418g of tin bromide, 5ml of octadecene, 0.5ml of oleic acid, and 0.5ml of oleylamine at room temperature, and add them to a 50ml two-necked flask. 2 After stirring for 10 minutes, raise the temperature to 120°C and keep it warm for 1 hour until the solid is completely dissolved, then raise the temperature to the reaction temperature of 150°C, inject 0.4ml of the solution prepared in step (1) at about 120°C, and...

Embodiment 2

[0045] Preparation of blue-emitting Cs 4 PbBr 6 Zero-dimensional perovskite nanomaterials

[0046] (1) Weigh 0.4g of cesium carbonate, 1.5ml of oleic acid, and 15ml of octadecene at room temperature, and add them to a 100ml two-necked flask. 2 After stirring for 20 minutes, raise the temperature to 120°C and keep it warm for 1 hour until the cesium carbonate is completely dissolved, then raise the temperature to 150°C and keep it warm for 10 minutes, then lower the temperature. 2 Storage under the atmosphere, was cloudy.

[0047] (2) Weigh 0.0138g of lead bromide, 0.0418g of tin bromide, 5ml of octadecene, 0.5ml of oleic acid, and 0.5ml of oleylamine at room temperature, and add them to a 50ml two-necked flask. 2 After stirring for 10 minutes, raise the temperature to 120°C and keep it warm for 1 hour until the solid is completely dissolved, then raise the temperature to the reaction temperature of 170°C, inject 0.4ml of the solution prepared in step (1) at about 120°C, and...

Embodiment 3

[0052] Preparation of blue-emitting Cs 4 PbBr 6 Zero-dimensional perovskite nanomaterials

[0053] (1) Weigh 0.4g of cesium carbonate, 1.5ml of oleic acid, and 15ml of octadecene at room temperature, and add them to a 100ml two-necked flask. 2 After stirring for 20 minutes, raise the temperature to 120°C and keep it warm for 1 hour until the cesium carbonate is completely dissolved, then raise the temperature to 150°C and keep it warm for 10 minutes, then lower the temperature. 2 Storage under the atmosphere, was cloudy.

[0054] (2) Weigh 0.0138g of lead bromide, 0.0418g of tin bromide, 5ml of octadecene, 0.5ml of oleic acid, and 0.5ml of oleylamine at room temperature, and add them to a 50ml two-necked flask. 2 After stirring for 10 minutes, raise the temperature to 120°C and keep it warm for 1 hour until the solid is completely dissolved, then raise the temperature to the reaction temperature of 200°C, inject 0.4ml of the solution prepared in step (1) at about 120°C, and...

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Abstract

The invention discloses a Cs 4 PbBr 6 Zero-dimensional perovskite nanomaterials and their preparation methods and applications. Using the synthetic method of hot injection, by changing the conditions of the reaction precursor, the Cs 4 PbBr 6 Zero-dimensional perovskite nanomaterials are doped with tin to effectively adjust their bandgap, and finally prepare monodisperse, homogeneous tin-doped Cs with obvious blue luminescence 4 PbBr 6 Zero-dimensional perovskite nano-luminescent material, the luminescent material is Cs in the trigonal phase 4 PbBr 6 nanomaterials. The synthesis conditions of this preparation method are easy to control, and the blue-emitting Cs prepared 4 PbBr 6 The zero-dimensional perovskite nanoparticles have better dispersion, uniformity and repeatability, and their luminescent properties are good. Blue glowing Cs 4 PbBr 6 Zero-dimensional perovskite nanomaterials are nano-luminescent materials with excellent performance, which have great potential for development in the fields of light-emitting displays and optoelectronic devices.

Description

technical field [0001] The invention belongs to the technical field of nano-luminescent materials, in particular to a Cs 4 PbBr 6 Zero-dimensional perovskite nanomaterials and their preparation methods and applications. Background technique [0002] All-inorganic perovskite nanomaterials have excellent optical properties such as high fluorescence quantum yield, adjustable emission wavelength, and narrow emission half-maximum width, showing broad application prospects in light-emitting diodes, solar cells, photodetectors, and lasers. It has developed vigorously in recent years. According to its structure lead halide octahedral ([PbX 6 ] 4- , X=Cl, Br, I) Different connection modes can derive a variety of perovskite-related phases. At present, the most studied three-dimensional all-inorganic perovskite nanomaterials (CsPbX 3 , X=Cl, Br, I), which has the common [PbX 6 ] 4- Octahedral interconnected perovskite structure, there is also a zero-dimensional perovskite nanom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/66H01L33/26
CPCC09K11/665H01L33/26
Inventor 邹胜晗于立成刘永升洪茂椿
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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