Preparation method of copper-zinc-tin-sulfur nano particles

A nanoparticle, copper-zinc-tin-sulfur technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve problems such as harsh reaction conditions, achieve the effect of simple equipment requirements and avoid expensive equipment

Inactive Publication Date: 2010-03-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Found through literature search to prior art, R.Nitsche etc. published "Crystal growth ofquaternary Cu" in "Journal of Crystal Growth" (crystal growth) 1967 volume 1 phase 1 No. 52~53 pages 2 ZnSnS 4 Chalcogenides by iodine vapor transport" (single crystal Cu 2 ZnSnS 4 ) Since then, professionals have developed sputtering, thermal evaporation and other Cu 2 ZnSnS 4 Preparation methods, but these methods require a vacuum environment and harsh reaction conditions

Method used

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  • Preparation method of copper-zinc-tin-sulfur nano particles

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Embodiment 1

[0027] Add 0.25mmol zinc chloride, 0.25mmol tin dichloride, 0.5mmol copper acetate, 1mmol sulfur powder into the reaction tube, add 1.25mmol oleylamine, heat treatment at 100°C for 24 hours, dissolve the obtained product in ethanol, and centrifuge at 8000rpm For 10 minutes, remove the lower layer of precipitate, add chloroform, centrifuge at 7000rpm for 5 minutes, take the supernatant, add 0.1ml oleylamine and 2.5ml of ethanol, centrifuge at 8000rpm for 10 minutes, remove the lower layer of precipitate, evaporate the solvent to obtain copper zinc tin sulfur Nanoparticles, copper-zinc-tin-sulfur nanoparticles have a diameter of 5nm, and the X-ray diffraction pattern of the final product is as follows figure 1 .

Embodiment 2

[0029] Add 0.3mmol of zinc sulfate, 0.3mmol of tin acetate, 0.5mmol of cuprous cyanide, and 4.4mmol of sulfur powder into the reaction tube, add 15mmol of oleylamine, heat at 350°C for 10 hours, and dissolve the obtained product in 3.8ml of ethylene glycol. Centrifuge at 8000rpm for 10 minutes, remove the lower precipitate, add 2.5ml tetrachlorethylene, centrifuge at 7000rpm for 5 minutes, take the supernatant, add 0.1ml oleylamine and 2.5ml ethylene glycol, centrifuge at 8000rpm for 10min, remove the lower layer, evaporate Obtain copper-zinc-tin-sulfur nanoparticles after the solvent is dried, and the diameter of the copper-zinc-tin-sulfur nanoparticles is 8nm, and the X-ray diffraction pattern of the final product is as follows: figure 2 .

Embodiment 3

[0031] Add 0.3mmol of zinc acetate, 0.28mmol of tin dichloride, 0.5mmol of cuprous chloride, and 1.5mmol of sulfur powder into the reaction tube, add 6mmol of oleylamine, heat at 500°C for 1 hour, and dissolve the obtained product in 2.85ml of ethylene dichloride Alcohol, centrifuge at 8000rpm for 10 minutes, remove the lower layer of precipitate, add 2.5ml of n-hexane, centrifuge at 7000rpm for 5 minutes, take the supernatant, add 0.1ml of oleylamine and 2.5ml of ethylene glycol, centrifuge at 8000rpm for 10 cuprous chloride Remove the lower layer of precipitation, evaporate the solvent to obtain copper zinc tin sulfur nanoparticles, the diameter of the copper zinc tin sulfur nanoparticles is 9nm, and the X-ray diffraction pattern of the final product is as follows: image 3 .

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Abstract

The invention relates to a preparation method of copper-zinc-tin-sulfur nano particles, which comprises the following steps: firstly, taking bivalent zinc salts, bivalent tin salts, univalent or bivalent copper salts, and sulfur powder; secondly, mixing the materials taken in the first step, adding oleyl amine, heating and purifying the product to obtain the copper-zinc-tin-sulfur nano-particles.The preparation method is pollution-free green, has mild and simple reaction conditions and low cost, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method in the field of photoelectric materials, in particular to a preparation method of copper-zinc-tin-sulfur nanoparticles. Background technique [0002] Copper zinc tin sulfur (Cu 2 ZnSnS 4 , English abbreviation is CZTS) has a kesterite structure, its band gap is very close to the optimal band gap (1.5eV) required by semiconductor solar cells, and has a large absorption coefficient (up to 10 4 cm -1 ), is a solar cell absorber material that has developed rapidly in recent years and has broad prospects. The elements copper, zinc, tin, and sulfur in copper, zinc, tin, and sulfur are very rich in earth reserves, do not contain toxic components, and are environmentally friendly. They have become the best candidate materials for replacing the absorber layer of copper indium gallium selenide solar cells, and may become The mainstream product of photovoltaic cells in the future. In addition, with the developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00H01L31/18H01L31/0216
CPCY02P70/50
Inventor 张亚非魏浩胡林郭炜周钢
Owner SHANGHAI JIAO TONG UNIV
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