Device and method for continuous and controllable synthesis of uniform nanocrystalline at normal temperature

A nanocrystalline, normal temperature technology, applied in the direction of nanotechnology, nano-optics, nanotechnology, etc., can solve the problems that the magnetic heating stirrer cannot accurately control the reaction time and temperature, the high-temperature reaction consumes a lot of energy, and the post-processing process is cumbersome. Low cost, avoid high temperature heating, uniform size effect

Inactive Publication Date: 2020-03-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires high temperature reaction and consumes a lot of energy, and needs to be reacted in an inert protective gas. At the same time, the operation is complex and prone to human error. The magnetic heating stirrer cannot accurately control the reaction time and temperature, and it is easy to cause overheating and affect the material properties.
And the post-processing process is cumbersome, and the size of the nanocrystals obtained after multiple centrifugal washings is relatively uniform

Method used

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  • Device and method for continuous and controllable synthesis of uniform nanocrystalline at normal temperature
  • Device and method for continuous and controllable synthesis of uniform nanocrystalline at normal temperature
  • Device and method for continuous and controllable synthesis of uniform nanocrystalline at normal temperature

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Embodiment 1

[0041] Provides a device for continuous and controllable synthesis of uniform nanocrystals at room temperature, including: lead bromide precursor injector (1), Cs precursor injector (2), through a dual-channel syringe pump (3), capillary microfluidic chip microreactor (5), ultrasonic device (6), collecting device (7). The lead bromide precursor injector (1) and the Cs precursor injector (2) are connected to two inlets of a dual-channel syringe pump, and the outlet of the dual-channel syringe pump is connected to the capillary microfluidic chip microreactor (5 ), the outlet of the capillary microfluidic chip microreactor is connected to a polytetrafluoroethylene connecting pipe, the middle part of the connecting pipe is placed in the ultrasonic device, and the tail of the polytetrafluoroethylene connecting pipe is connected to the collection device connected.

[0042] Further, the inner diameter of the polytetrafluoroethylene connecting tube (4) matches the outlet of the capil...

Embodiment 2

[0050] 1) configure the lead bromide precursor, and analyze the pure PbBr 2 Dissolve in 1-octadecene, add a certain amount of oleic acid and oleylamine after heating under nitrogen atmosphere for a certain period of time, and wait for PbBr 2 Cool to room temperature after complete dissolution;

[0051] 2) Configure the Cs precursor and analyze the pure Cs 2 CO 3 Dissolve in 1-octadecene, add a certain amount of oleic acid after heating for a certain period of time under nitrogen atmosphere, and wait until Cs 2 CO 3 Completely dissolve the solution and cool to room temperature after clarification;

[0052] 3) Put the prepared lead bromide precursor and Cs precursor into the lead bromide precursor injector (1) and the Cs precursor injector (2) respectively, and the lead bromide precursor and the Cs precursor are mixed at 2-10mL / Inject at a suitable flow rate of h, enter the capillary microfluidic chip microreactor (5) and mix evenly, then place it in the ultrasonic device ...

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Abstract

The invention relates to a device and a method for continuous and controllable synthesis of uniform nanocrystalline at normal temperature. The method includes: injecting a prepared lead bromide precursor and Cs precursor into a capillary micro-fluidic chip micro-reactor (5) through a double-channel injection pump (3), mixing the substances uniformly, feeding the mixture into a connecting pipe (4),then putting the connecting pipe into an ultrasonic device (6), and carrying out ultrasonic continuous reaction, thus achieving continuous and controllable synthesis of cesium-lead-bromine perovskiteuniform nanocrystalline directly at normal temperature. The device and method provided by the invention realizes continuous synthesis of cubic-phase cesium-lead-bromine perovskite nanocrystalline with uniform size at normal temperature.

Description

technical field [0001] The invention belongs to the technical field of automatic synthesis of information materials, and in particular relates to a device and method for continuously and controllably synthesizing uniform nanocrystals at normal temperature. Background technique [0002] Nanocrystals can also be called quantum dots, with a size generally between 2 and 50nm. They are semiconductor crystals that have quantum confinement effects in three dimensions of space, and produce high-purity luminescence due to electron-hole recombination. Due to its unique optical effect, it can be widely used in many fields such as solar cells, displays, optoelectronic devices and living biomarker imaging. [0003] At present, the most important nanocrystal synthesis method is the thermal injection method. Taking the synthesis of cesium lead halide by the thermal injection method as an example, the organic precursor of Cs is mainly prepared in advance, and then the lead halide salt is di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/16C09K11/66B82Y20/00B82Y40/00B01J19/00
CPCB01J19/0093B82Y20/00B82Y40/00C01G21/16C01P2002/01C01P2002/34C01P2002/72C01P2004/04C01P2004/64C09K11/665
Inventor 邓兆吕佳敏高嘉瑞欧阳绮李毅鹏汤富甄厚儒陈丽华宋彦宝
Owner WUHAN UNIV OF TECH
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