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Microwave-synthesis method for preparation of copper-zinc-tin-sulphur (CZTS) nanoparticles

A nano-particle, copper-zinc-tin-sulfur technology, which is applied in the field of materials and preparations in the field of nano-photoelectric technology, can solve the problems of high energy consumption and long reaction time, and achieve the effects of reducing energy consumption, short preparation period and large output.

Inactive Publication Date: 2012-07-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While preparing Cu 2 ZnSnS 4 Nanoparticles are mainly used solvothermal method, which requires a long reaction time and high energy consumption to prepare materials

Method used

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  • Microwave-synthesis method for preparation of copper-zinc-tin-sulphur (CZTS) nanoparticles
  • Microwave-synthesis method for preparation of copper-zinc-tin-sulphur (CZTS) nanoparticles
  • Microwave-synthesis method for preparation of copper-zinc-tin-sulphur (CZTS) nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 1 mmol of zinc chloride, 1 mmol of tin dichloride, 2 mmol of copper chloride, and 4 mmol of sodium thiosulfate and dissolve them in 50 mL of ethylene glycol, stir them evenly and put them in a microwave oven for heating. to 800 W, react for 5 min, centrifuge and wash with ultrapure water to obtain Cu 2 ZnSnS 4 thin film nanoparticles. Prepared Cu 2 ZnSnS 4 The X-ray diffraction spectrum, absorption spectrum and scanning electron microscope pictures of nanoparticles are as follows: figure 1 , figure 2 and image 3 shown. Prepared Cu 2 ZnSnS 4 The nanoparticles have a (112) preferred orientation, their optical band gap is about 1.5 eV, the size of the nanoparticles is about 200-400 nm, and the element ratio in the nanoparticles is Cu:Zn:Sn:S=2.1:1:1.1:4.1 .

[0029]

Embodiment 2

[0031] Weigh 1 mmol of zinc chloride, 1 mmol of tin dichloride, 2 mmol of copper chloride, and 4 mmol of sodium thiosulfate and dissolve them in 50 mL of ethylene glycol, stir them evenly and put them in a microwave oven for heating. to 800 W, react for 20 min, centrifuge and wash with ultrapure water to obtain Cu 2 ZnSnS 4 thin film nanoparticles.

[0032]

Embodiment 3

[0034] Weigh 1 mmol of zinc chloride, 1 mmol of tin dichloride, 2 mmol of copper chloride, and 4 mmol of sodium thiosulfate and dissolve them in 50 mL of ethylene glycol, stir them evenly and put them in a microwave oven for heating. to 400 W, react for 20 min, centrifuge and wash with ultrapure water to obtain Cu 2 ZnSnS 4 thin film nanoparticles.

[0035]

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PUM

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Abstract

The invention relates to a low-cost microwave synthesis method for preparation of a material, namely Cu2ZnSnS4, of an absorbing layer of a solar cell, which belongs to the technical field of solar cell materials and devices. According to the invention, suitable reaction solution is prepared, and then the solution is put into a microwave oven to be heated to obtain Cu2ZnSnS4 nanoparticles. The microwave synthesis method has the advantages that raw materials are rich in source and low in cost, complicated equipment is not needed, the preparation process is simple, the preparation cost is low, and components of the nanoparticles are controllable. The prepared copper-zinc-tin-sulphur (CZTS) nanoparticles can be dispersed into ethanol or ethylene glycol to form ink, and the ink is coated to form a thin film, so that the CZTS thin film solar cell is manufactured.

Description

Technical field [0001] The present invention involves a material and preparation method in the field of nano -optoelectronics technology, which specifically involves a synthesis method of copper -zinc tin sulfur nanoparticles. [0002] Background technique [0003] Global energy shortage, environmental pollution, and climate warming are increasingly troubled human society.Seeking green alternative energy and achieving sustainable development has become a topic facing countries around the world.In the long run, renewable energy will be the main source of human energy in the future.In the use of new development of renewable energy, solar batteries are the most potential. [0004] Due to the shortage of global silicon materials and high preparation costs, the film solar cell has attracted widespread attention and has become the focus of research on science and technology workers.The film solar cells are divided into silicon -based thin film solar batteries and compound thin film sol...

Claims

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Application Information

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IPC IPC(8): C01G19/00B82Y40/00
Inventor 沈鸿烈王威
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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