Device and method for rapidly and continuously synthesizing multi-morphology cesium lead halide cluster perovskite quantum dots

Abstract

The invention relates to a device and a method for rapidly and continuously synthesizing multi-morphology Cs-Pb halo-cluster perovskite quantum dots. The device is characterized in that a Cs precursor injector and a lead halide precursor injector are connected to two first annular microchannels arranged in a constant-temperature oil bath through polytetrafluoroethylene connecting tubes respectively, and the two annular microchannels are connected with a micromixer arranged on a heating magnetic stirrer and then sequentially connected with a second annular microchannel and a liquid collector through the polytetrafluoroethylene connecting tubes. The polytetrafluoroethylene capillary tubes are adopted as the microchannels, stable reaction temperature and precise reaction time are provided for a reaction, the prepared perovskite quantum dots are uniform in size and have three different morphologies including spherical, rod-like and cubic morphologies, and meanwhile, the perovskite quantum dots with the fluorescence spectrum range being 395-700 nm can be synthesized rapidly by changing types and ratio of halogen elements and the reaction temperature.

Description

technical field

[0001] The invention relates to a device and method for rapidly and continuously synthesizing multi-morphology cesium lead halide cluster perovskite quantum dots. The said halogen clusters are Cl, Br, I. The invention relates to a device and a synthesis method for rapidly synthesizing perovskite quantum dots, which belong to the field of microchemical mechanical system and nanometer material preparation. Background technique

[0002] Quantum dots, which can be called nanocrystals and sometimes "artificial atoms", have a wide range of applications in many fields such as biomedicine, displays, semiconductor devices, solar cells, and light-emitting devices. In the past few years, perovskite materials have made breakthroughs in the field of solar cells. According to the certified solar cell efficiency of the National Renewable Energy Laboratory, organic-inorganic hybrid based perovskite MAPbX 3 (MA=CH 3 NH 3 + ,X=Cl - , Br - , I - , or by mixing two or thr...

Examples

Embodiment 1

[0036] Cs precursor: 0.65g of CsCO 3 Dissolve 2.5ml of oleic acid and 18ml of octadecene to form a mixed solution. Heat the mixed solution at 150°C for 1 hour to obtain a light yellow and transparent Cs precursor. After cooling to room temperature, take 2ml of the Cs precursor solution and dilute it with octadecene to After the 26ml was fully stirred, a colorless and transparent solution with a total volume of 26ml was formed, and the colorless and transparent liquid was filled into a 20ml syringe.

[0037] PbBr 2 Precursor: 0.734g of PbBr 2 Dissolve in 20ml of octadecene, 3ml of oleic acid and 3ml of oleylamine to form a mixed solution with a total volume of 26ml. After the mixed solution is heated at 150°C for 1 hour, a light yellow transparent liquid is obtained. After cooling to room temperature, take 20ml of the mixed solution Fill into a 20ml syringe.

[0038] Attached figure 1 The shown rapid synthesis perovskite quantum dot device uses polytetrafluoroethylene with ...

Embodiment 2

[0042] Cs precursor: 0.65g of CsCO 3 Dissolve 2.5ml of oleic acid and 18ml of octadecene to form a mixed solution. Heat the mixed solution at 150°C for 1 hour to obtain a light yellow and transparent Cs precursor. After cooling to room temperature, take 2ml of the Cs precursor solution and dilute it with octadecene to After the 26ml was fully stirred, a colorless and transparent solution with a total volume of 26ml was formed, and the colorless and transparent liquid was filled into a 20ml syringe.

[0043] PbBr 2 :PbI 2 (1:1) precursor: 0.3670g of PbBr 2 and 0.4601 g of PbI 2 Dissolve in 20ml of octadecene, 3ml of oleic acid and 3ml of oleylamine to form a mixed solution with a total volume of 26ml. After the mixed solution is heated at 150°C for 1 hour, a light yellow transparent liquid is obtained. After cooling to room temperature, take 20ml of the mixed solution Fill into a 20ml syringe.

[0044] Attached figure 1 The shown rapid synthesis perovskite quantum dot dev...

Embodiment 3

[0048] Cs precursor: 0.65g of CsCO 3 Dissolve 2.5ml of oleic acid and 18ml of octadecene to form a mixed solution. Heat the mixed solution at 150°C for 1 hour to obtain a light yellow and transparent Cs precursor. After cooling to room temperature, take 2ml of the Cs precursor solution and dilute it with octadecene to After the 26ml was fully stirred, a colorless and transparent solution with a total volume of 26ml was formed, and the colorless and transparent liquid was filled into a 20ml syringe.

[0049] PbBr 2 :PbI 2 (1:3) precursor: 0.1835g of PbBr 2 and 0.6901 g of PbI 2 Dissolve in 20ml of octadecene, 3ml of oleic acid and 3ml of oleylamine to form a mixed solution with a total volume of 26ml. After the mixed solution is heated at 150°C for 1 hour, a light yellow transparent liquid is obtained. After cooling to room temperature, take 20ml of the mixed solution Fill into a 20ml syringe.

[0050] Attached figure 1 The shown rapid synthesis perovskite quantum dot dev...

technical field

[0001] The invention relates to a device and method for rapidly and continuously synthesizing multi-morphology cesium lead halide cluster perovskite quantum dots. The said halogen clusters are Cl, Br, I. The invention relates to a device and a synthesis method for rapidly synthesizing perovskite quantum dots, which belong to the field of microchemical mechanical system and nanometer material preparation. Background technique

[0002] Quantum dots, which can be called nanocrystals and sometimes "artificial atoms", have a wide range of applications in many fields such as biomedicine, displays, semiconductor devices, solar cells, and light-emitting devices. In the past few years, perovskite materials have made breakthroughs in the field of solar cells. According to the certified solar cell efficiency of the National Renewable Energy Laboratory, organic-inorganic hybrid based perovskite MAPbX 3 (MA=CH 3 NH 3 + ,X=Cl - , Br - , I - , or by mixing two or thr...

Examples

Embodiment 1

[0036] Cs precursor: 0.65g of CsCO 3 Dissolve 2.5ml of oleic acid and 18ml of octadecene to form a mixed solution. Heat the mixed solution at 150°C for 1 hour to obtain a light yellow and transparent Cs precursor. After cooling to room temperature, take 2ml of the Cs precursor solution and dilute it with octadecene to After the 26ml was fully stirred, a colorless and transparent solution with a total volume of 26ml was formed, and the colorless and transparent liquid was filled into a 20ml syringe.

[0037] PbBr 2 Precursor: 0.734g of PbBr 2 Dissolve in 20ml of octadecene, 3ml of oleic acid and 3ml of oleylamine to form a mixed solution with a total volume of 26ml. After the mixed solution is heated at 150°C for 1 hour, a light yellow transparent liquid is obtained. After cooling to room temperature, take 20ml of the mixed solution Fill into a 20ml syringe.

[0038] Attached figure 1 The shown rapid synthesis perovskite quantum dot device uses polytetrafluoroethylene with ...

Embodiment 2

[0042] Cs precursor: 0.65g of CsCO 3 Dissolve 2.5ml of oleic acid and 18ml of octadecene to form a mixed solution. Heat the mixed solution at 150°C for 1 hour to obtain a light yellow and transparent Cs precursor. After cooling to room temperature, take 2ml of the Cs precursor solution and dilute it with octadecene to After the 26ml was fully stirred, a colorless and transparent solution with a total volume of 26ml was formed, and the colorless and transparent liquid was filled into a 20ml syringe.

[0043] PbBr 2 :PbI 2 (1:1) precursor: 0.3670g of PbBr 2 and 0.4601 g of PbI 2 Dissolve in 20ml of octadecene, 3ml of oleic acid and 3ml of oleylamine to form a mixed solution with a total volume of 26ml. After the mixed solution is heated at 150°C for 1 hour, a light yellow transparent liquid is obtained. After cooling to room temperature, take 20ml of the mixed solution Fill into a 20ml syringe.

[0044] Attached figure 1 The shown rapid synthesis perovskite quantum dot dev...

Embodiment 3

[0048] Cs precursor: 0.65g of CsCO 3 Dissolve 2.5ml of oleic acid and 18ml of octadecene to form a mixed solution. Heat the mixed solution at 150°C for 1 hour to obtain a light yellow and transparent Cs precursor. After cooling to room temperature, take 2ml of the Cs precursor solution and dilute it with octadecene to After the 26ml was fully stirred, a colorless and transparent solution with a total volume of 26ml was formed, and the colorless and transparent liquid was filled into a 20ml syringe.

[0049] PbBr 2 :PbI 2 (1:3) precursor: 0.1835g of PbBr 2 and 0.6901 g of PbI 2 Dissolve in 20ml of octadecene, 3ml of oleic acid and 3ml of oleylamine to form a mixed solution with a total volume of 26ml. After the mixed solution is heated at 150°C for 1 hour, a light yellow transparent liquid is obtained. After cooling to room temperature, take 20ml of the mixed solution Fill into a 20ml syringe.

[0050] Attached figure 1 The shown rapid synthesis perovskite quantum dot dev...

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