Method for preparing copper-zinc-tin-selenium nano powder material

A nano-powder, copper-zinc-tin-selenium technology, applied in the field of preparation of nano-copper-zinc-tin-selenium powder photovoltaic materials, can solve the problems of increased operation steps, cost, and high price, and achieve low cost, fast and effective cost, and good dispersion Effect

Inactive Publication Date: 2012-04-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Shavel A et al. (Shavel A, Arbiol J, Cabot A.2010.Journal of the American Chemical Society, 132:4514-4515) synthesized CZTSe nanoparticles by wet chemical method, but the solvents used were oleylamine and trioctylphosphine oxide (TOP), the price is higher, the reaction temperature reaches 295 ° C, and when the reaction is completed, chloroform or toluene must be added to prevent the solidification of the solvent, which increases the operation steps and costs

Method used

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  • Method for preparing copper-zinc-tin-selenium nano powder material
  • Method for preparing copper-zinc-tin-selenium nano powder material
  • Method for preparing copper-zinc-tin-selenium nano powder material

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Experimental program
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Effect test

Embodiment 1

[0028] The copper-zinc-tin-selenide nanopowder is synthesized according to the following process steps.

[0029] a. Prepare the following two solutions respectively:

[0030] Solution A: Weigh 4mmolCuCl, 2mmolZnCl 2 , 2mmolSnCl 4 2H 2 O was placed in a 100mL three-necked flask containing 40mL of triethanolamine, stirred under the protection of an inert gas, and heated to 180°C in an oil bath. The color of the solution changed from green to dark blue to brown, and stopped heating when all the solids were dissolved.

[0031] Solution B: Weigh 8 mmol of Se powder and add it into another 100 mL three-necked flask containing 40 mL of triethanolamine, and slowly raise the temperature to 180°C. After the Se powder is completely dissolved, the solution turns reddish brown.

[0032] b. After solution A and solution B are cooled, mix solution A and solution B under the protection of inert gas under normal temperature and normal pressure, and fully stir.

[0033] c. Slowly heat the m...

Embodiment 2

[0040] The copper-zinc-tin-selenium nanopowder is synthesized according to the following process steps.

[0041] a. Prepare the following two solutions respectively:

[0042] Solution A: Weigh 2mmol copper(II) acetylacetonate, 1mmol zinc acetate, and 1mmol tin(II) chloride in a 100mL three-necked flask filled with 25mL triethanolamine, stir under inert gas protection conditions, and heat the oil bath to 120 °C, the color of the solution changed from green to dark blue and then to brown, and the heating was stopped when all the solids were dissolved.

[0043] Solution B: Weigh 4mmol of Se powder and add it into another 100mL three-neck flask containing 25mL of triethanolamine, and slowly raise the temperature to 200°C. After the Se powder is completely dissolved, the solution turns reddish brown.

[0044] b. Heat solution B to 240°C, quickly add solution A to solution B, the color of the solution immediately turns black, and continue to stir.

[0045] c. The mixed solution wa...

Embodiment 3

[0051] Synthesize copper-zinc-tin-selenide nanopowder according to the following process steps, and use diglycolamine as solvent.

[0052] a. Prepare the following two solutions respectively:

[0053] Solution A: Weigh 2mmol of cuprous (I) acetate, 1mmol of zinc citrate, and 1mmol of stannous chloride (II) in a 100mL three-neck flask filled with 25mL of diglycolamine, stir under inert gas protection conditions, and place in an oil bath Heating to 160°C, the color of the solution changed from colorless to dark blue and then to brown, and stopped heating when all the solids were dissolved.

[0054] Solution B: Weigh 4mmol of Se powder and add it to another 100mL three-necked flask containing 25mL of diglycolamine, and slowly raise the temperature to 200°C. After the Se powder is completely dissolved, the solution turns reddish brown.

[0055] b. After solution A and solution B are cooled, mix solution A and solution B in an inert gas protection under normal temperature and pres...

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Abstract

The invention discloses a method for preparing a copper-zinc-tin-selenium nano powder material, and belongs to the technical field of photoelectric materials. The method comprises the following steps of: preparing alkyl alcohol amine solution (system A) of Cu, Zn and Sn in a molar ratio of 2: 1: 1 by using alkyl alcohol amine with a boiling point of no less than 180 DEG C as a solvent, preparing alkyl alcohol amine solution (system B) of Se at the same time, then mixing the system A and the system B in a molar ratio of Se to Cu of 2: 1, and reacting the mixture with stirring and heating reflux under the protection of inert gas to obtain the copper-zinc-tin-selenium nano powder material. The copper-zinc-tin-selenium nano particles with nano scale, uniform size, good dispersion and high phase purity are prepared by selecting and using rich and environment-friendly Zn and Sn elements to replace rare metals In and Ga; and the whole preparation process has simple equipment requirement, is green and pollution-free, and does not need selenium atmosphere. The copper-zinc-tin-selenium nano powder material prepared by the method is mainly used in a solar cell and used as an absorption layermaterial.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and relates to a preparation method of nanometer copper-zinc-tin-selenium powder photovoltaic materials. Background technique [0002] Low-cost thin-film solar cells have attracted widespread attention due to their low-carbon, environmentally friendly properties. At this stage, CdTe and CuIn are most widely used in commercial photovoltaic thin film materials. x Ga 1-x Se 2 However, the development of thin-film solar cells is limited due to the rarity of Te, Ga, In and the toxicity of Cd. [0003] Quaternary compound semiconductor Cu 2 ZnSnSe 4 (CZTSe) with kesterite structure is one of the most promising absorber materials for cheap solar cells. CZTSe has a suitable forbidden band width (1.0-1.5ev), high absorption coefficient for visible light (10 5 cm -2 ), low toxicity and environmental friendliness, abundant raw materials, and the CZTSe film has very good thermoelectri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/20
Inventor 吴孟强张树人张其翼刘文龙
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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