Preparation method for synthesizing inorganic perovskite nanocrystals by non-injection one-step method

A technology of inorganic calcium and nanocrystals, applied in inorganic chemistry, nanotechnology, chemical instruments and methods, etc., can solve the problems of difficulty in the formation process of nanocrystals, and achieve the advantages of mass production, easy storage and transportation, and high quantum efficiency. Effect

Active Publication Date: 2021-08-24
QUFU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main synthesis methods of inorganic perovskite nanocrystals are: the thermal injection method proposed by Kovalenko et al. (Protesescu L, Yakunin S, Bodnarchuk M I, et al.2015 Nano Lett. 15 3692) and Zeng et al. (Li X, Wu Y , Zhang S, et al. 2016 Adv.Funct. Mater. 26 2435) proposed the supersaturated recrystallization method, but the disadvantage of these methods is that when the precursor is inje

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  • Preparation method for synthesizing inorganic perovskite nanocrystals by non-injection one-step method
  • Preparation method for synthesizing inorganic perovskite nanocrystals by non-injection one-step method
  • Preparation method for synthesizing inorganic perovskite nanocrystals by non-injection one-step method

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Effect test

Embodiment 1

[0030] (1) Add 0.0525g cesium bromide, 0.0925g PbBr 2 , 315μL oleic acid, 315μL oleylamine, 5ml 1, 4 dioxane, 75μL deionized water mixed, continuous ultrasound or stirring at room temperature, can prepare CsPbBr 3 Colloidal solution of nanoblocks;

[0031] (2) CsPbBr 3 Colloidal solution of nanoblocks CsPbBr can be obtained after the colloidal solution is centrifuged at 10,000 r / min for 8 min, the supernatant is discarded, and dried in a vacuum oven at 50°C for 7 hours. 3 Nanoblock powder.

Embodiment 2

[0033] Using the same process as in Example 1, the difference is that the amount of deionized water in Example 1 is changed to 150 μL, and other conditions are kept the same, and the coating structure CsPbBr can be obtained 3 Nanocrystalline.

Embodiment 3

[0035] (1) Mix 0.047g cesium iodide, 0.083g PbI 2 , 250μL oleic acid, 250μL oleylamine, 4ml 1, 4 dioxane, 60μL deionized water mixed, 70 ℃ continuous ultrasound or stirring, you can prepare CsPbI 3 Colloidal solution of nanoblocks;

[0036] (2) CsPbI 3 Colloidal solution of nanoblocks CsPbI can be obtained after the colloidal solution is centrifuged at 10000 r / min for 8 min, the supernatant is discarded, and dried in a vacuum oven at 50 °C for 7 hours. 3 Nanoblock powder.

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Abstract

The invention discloses a preparation method for synthesizing inorganic perovskite nanocrystals by a non-injection one-step method. A monovalent metal cation compound, a halide BX2, a ligand, a weakly polar or non-polar organic solvent and an inducer are mixed and subjected to continuous ultrasonic treatment or stirring, precursor injection is not needed, the inorganic perovskite nanocrystal can be prepared, a large batch of powder samples can be obtained after separation, purification and drying, and the powder samples are easy to store and transport. The preparation method is simple, the cost is low, the reaction and nucleation process is controllable, the morphology of the nanocrystal can be accurately changed by adjusting the ligand, the inducer, the reaction time, the reaction temperature and the like, the performance of the inorganic perovskite nanocrystal is regulated and controlled, and the application value is extremely high. Particularly, the inorganic perovskite nanocrystal which is well dispersed and stable in water can be obtained by controlling the addition amount of the inducer, and the stability of the nanocrystal is greatly improved.

Description

technical field [0001] The invention relates to a preparation method for synthesizing inorganic perovskite nanocrystals by a non-injection one-step method, and belongs to the technical field of perovskite nanocrystal synthesis. Background technique [0002] In recent years, inorganic perovskite nanocrystals, as a new type of semiconductor material and efficient tunable light source, have been widely used in light-emitting devices, displays and other fields. In order to meet various application requirements, it is particularly important to prepare inorganic perovskite nanocrystals with high stability and controllable morphology. [0003] Since the first report on the synthesis of all-inorganic perovskite nanocrystals in 2015, efforts have been made to develop stable and reproducible synthetic methods for the preparation of high-quality inorganic perovskite nanocrystals. The main synthesis methods of inorganic perovskite nanocrystals are: the thermal injection method proposed...

Claims

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Application Information

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IPC IPC(8): C01G21/00B82Y40/00
CPCC01G21/006B82Y40/00C01P2004/04C01P2002/84C01P2006/60C01P2004/01
Inventor 孔晓波刘丽娟
Owner QUFU NORMAL UNIV
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