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Preparation method of perovskite nanocrystals

A perovskite and nanocrystal technology, applied in the field of materials, can solve problems such as harsh and cumbersome synthesis conditions, increase limitations, etc., and achieve the effect of easy operation

Active Publication Date: 2018-06-22
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

However, the thermal injection method requires relatively harsh and cumbersome synthesis conditions, such as high temperature, inert gas protection and local injection operations.
These greatly increase the limitations of its practical application

Method used

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  • Preparation method of perovskite nanocrystals
  • Preparation method of perovskite nanocrystals
  • Preparation method of perovskite nanocrystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Example 1 Sample 1 # preparation of

[0121] Step 1: Add 10ml of octadecene to a 20ml reagent bottle, add 0.5ml of oleic acid and 0.5ml of oleylamine, then add 1ml of isopropyl titanate, and keep stirring (shake the table at a frequency of 560 per minute Oscillation, the shaker model is KS130basic);

[0122] Step 2: Weigh 0.3mmol of PbBr 2 and 0.1 mmol of Cs 2 CO 3 Add it to the above-mentioned constantly stirring solution, at room temperature and air environment, it can be observed that the color of the solution turns yellow after a few minutes, and a bright green light can be observed under the irradiation of ultraviolet lamp (365nm) after continuous stirring for 60 minutes;

[0123] Step 3: Centrifuge the reacted solution at 11,000rpm for 5 minutes to retain the CsPbBr in the lower precipitate 3 nanocrystals and preserved in toluene, the obtained CsPbBr 3 Nanocrystal is recorded as 1 # .

Embodiment 2

[0124] Example 2 Sample 2 # preparation of

[0125] Other steps are the same as in Example 1, except that the isopropyl titanate in step 1 is changed to tetraethyl titanate, and the obtained CsPbBr 3 Nanocrystal is recorded as 2 # .

Embodiment 3

[0126] Example 3 Sample 3 # preparation of

[0127] Other steps are the same as in Example 1, except that the isopropyl titanate in step 1 is changed to n-tetrabutyl titanate, and the obtained CsPbBr 3 Nanocrystalline is recorded as 3 # .

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PUM

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Abstract

The application discloses a method for synthesizing perovskite nanocrystals. The method at least comprises the following steps: S1) obtaining a system I containing organic titanium ester; S2) adding aperovskite precursor to the system I in the step S1) for a reaction under stirring to obtain the perovskite nanocrystalline material. With adoption of the method, the raw materials can be directly mixed at the room temperature, and the method is quick, simple and convenient to operate and is expected to be widely applied to large-scale synthesis of lead halide perovskite quantum dots.

Description

technical field [0001] The application relates to a method for preparing a perovskite nanocrystal material, which belongs to the field of materials. Background technique [0002] Lead halide perovskite nanocrystals have become a research hotspot in recent years due to their excellent photoelectric properties. Its photoluminescence yield can reach 90% without any additional surface passivation. The optical properties are tuneable over the entire visible spectrum. These optical properties have enabled them to emerge as novel materials for various optoelectronic applications, such as low-threshold one-photon and two-photon pump gain materials for efficient lasing LEDs. [0003] Traditional lead halide perovskite quantum dots are usually prepared by hot injection method. However, the thermal injection method requires harsh and cumbersome synthesis conditions, such as high temperature, inert gas protection, and local injection operations. These greatly increase its limitation...

Claims

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Application Information

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IPC IPC(8): C01G21/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G21/006C01P2002/72C01P2004/04C01P2004/62
Inventor 李莉萍方绍帆李广社
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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