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Ultrasonic-assisted microwave controllable preparation method of Cu2ZnSnS4 nano-particles

A nanoparticle, ultrasonic-assisted technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of relatively harsh preparation conditions and the inability to fundamentally reduce the cost of material preparation, and achieve good application prospects, preparation The effect of short cycle time and reduced production cost

Inactive Publication Date: 2013-12-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, Cu 2 ZnSnS 4 The preparation methods of thin films are mainly magnetron sputtering vulcanization method and thermal evaporation method. Both of these methods require large-scale vacuum equipment and have strict requirements on preparation conditions, which cannot fundamentally reduce the preparation cost of materials.

Method used

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  • Ultrasonic-assisted microwave controllable preparation method of Cu2ZnSnS4 nano-particles

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Experimental program
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Effect test

Embodiment 1

[0031] Weigh 0.02M zinc chloride, 0.02M stannous chloride, 0.02M copper chloride, 0.08M thiourea and 0.6g polyvinylpyrrolidone and dissolve them in 50mL of ethylene glycol, stir them evenly and put them into a microwave oven to heat. The microwave power is 800W, and the ultrasonic power is 900W. The reaction temperature is 120°C, the reaction time is 30min, centrifuged, and washed with ultrapure water to obtain Cu 2 ZnSnS 4 nanoparticles. figure 1 (a) The prepared Cu 2 ZnSnS 4 The SEM photo of the nanoparticles, the average size of the prepared nanoparticles is 200nm, and the flower-like structure.

Embodiment 2

[0033] Adopt 10W ultrasonic power, other parameters are identical with embodiment 1. figure 1 (b) is the prepared Cu 2 ZnSnS 4 The SEM photo of the nanoparticle, the size of the obtained nanoparticle is about 500nm, and the flower-like structure. figure 1 (a) with figure 1 (b) In comparison, the shapes of nanoparticles prepared under two different ultrasonic powers are the same, but under the condition of high ultrasonic power, the size of the obtained nanoparticles is smaller.

Embodiment 3

[0035] Weigh 0.04M zinc acetate, 0.04M tin acetate, 0.0SM copper acetate, 0.2M thiourea and 0.6g polyvinylpyrrolidone and dissolve them in 50mL of ethylene glycol, stir them evenly and put them into a microwave oven to heat, adjust the microwave power to 200W, adding ultrasonic assistance at the same time, the ultrasonic power is 450W, the reaction temperature is 120°C, the reaction time is 30min, centrifuged, and washed with ultrapure water to obtain Cu 2 ZnSnS 4 Nanoparticles, scanning electron micrographs of nanoparticles such as figure 2 (a) shown. Among the obtained particles, there are rod-shaped particles with a length of about 7.5 μm and flower-shaped particles with a size of about 300 nm.

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Abstract

The invention relates to an ultrasonic-assisted microwave controllable preparation method of Cu2ZnSnS4 nano-particles and belongs to the field of inorganic materials. On the basis of optimizing the formula, the microwave power and the time of a reaction solution, controllable preparation of the Cu2ZnSnS4 nano-particles is realized through adjusting the ultrasonic power. As the performance of the nano-particles is greatly influenced by the shapes and the sizes of the nano-particles, the Cu2ZnSnS4 nano-particles in different shapes and sizes have different application values. The particles with the particle sizes smaller than 10 nm are Cu2ZnSnS4 quantum dots with better luminous performance, the nano-particles with bigger particle sizes can be used for preparing ink, the ink is then used for preparing a Cu2ZnSnS4 film serving as an absorbing layer of a solar cell, and the Cu2ZnSnS4 particles of which the particle sizes reach the quasi micron size can be used as an anode material of a lithium ion battery. Therefore, controllable preparation of the Cu2ZnSnS4 nano-particles is very important. The inexpensive and easy-to-implement method is adopted to successfully prepare the Cu2ZnSnS4 particles in different particle sizes and different shapes.

Description

technical field [0001] The invention relates to an ultrasonic-assisted microwave controllable preparation of Cu 2 ZnSnS 4 The nanoparticle method specifically relates to the field of preparation of inorganic nanomaterials. Background technique [0002] The increasing depletion of traditional petrochemical energy forces people to seek a renewable alternative energy source. Compared with other energy sources, solar energy is the most ideal alternative energy source for human beings. Photovoltaic power generation technology can directly convert solar energy into electrical energy to meet human needs for energy. [0003] After nearly ten years of development, the research of solar cells has achieved many results. However, the current cost of solar cells is still high, which greatly limits its wide application. Therefore, people have been looking for a low-cost and environmentally friendly solar cell material and preparation method. Currently, sulfide solar cell materials h...

Claims

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Application Information

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IPC IPC(8): C01G19/00B82Y30/00
Inventor 沈鸿烈王威金佳乐
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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