Preparation method for CZTS nano-particle material

A nanoparticle, copper-zinc-tin-sulfur technology, applied in the field of materials, can solve the problems of long reaction time and poor crystallinity, and achieve the effects of shortened reaction time, good crystallinity, and easy mass production

Inactive Publication Date: 2014-01-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the common technical problems of poor crystallinity and long reaction time in the existing preparation technology of copper-zinc-tin-sulfur (CZTS) nanoparticle material, the present invention provides a more efficient preparation of copper-zinc-tin-sulfur nanoparticle material method, the copper-zinc-tin-sulfur nanoparticles prepared by the method have good crystallinity and more uniform particle size distribution

Method used

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  • Preparation method for CZTS nano-particle material
  • Preparation method for CZTS nano-particle material
  • Preparation method for CZTS nano-particle material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a. Prepare the following two solutions respectively:

[0026] Solution A: Weigh 0.02mol CuCl 2 , 0.04mol S, 0.001mol SbCl 3 In a 20ml polytetrafluoroethylene reactor filled with 10mol ethylenediamine, ultrasonically dissolve for 10 minutes.

[0027] Solution B: Weigh 0.01mol ZnCl 2 , 0.01molSnSO 4 In a 25ml beaker filled with 4ml deionized water, sonicate for 10 minutes.

[0028] b. Pour solution B into a 20ml reactor containing solution A, rinse the beaker with 2ml of water and pour it into the reactor, and ultrasonically dissolve the reactor containing 16ml of solution for 10 minutes.

[0029] c. Seal the reaction kettle and put it into an oven, raise the temperature to 200°C, and keep it warm for 7 hours.

[0030] d. After the reaction kettle was cooled to room temperature, the black dispersion in the lower layer was taken out, and impurities were removed by centrifugal washing with ethanol three times to obtain copper-zinc-tin-sulfur nanoparticles.

Embodiment 2

[0032] a. Prepare the following two solutions respectively:

[0033] Solution A: Weigh 0.02mol Cu(NO 3 ) 2 , 0.04mol S, 0.002mol Sb(NO 3 ) 3 In a 20ml polytetrafluoroethylene reactor filled with 10mol ethylenediamine, ultrasonically dissolve for 10 minutes.

[0034] Solution B: Weigh 0.01mol ZnSO 4 , 0.01molSnSO 4 In a 25ml beaker filled with 4ml deionized water, sonicate for 10 minutes.

[0035] b. Pour solution B into a 20ml reaction kettle containing solution A, rinse the beaker with 2ml of water and pour it into the reaction kettle, and ultrasonically dissolve the reaction kettle with 16ml of solution for 10 minutes.

[0036] c. Seal the reaction kettle and put it into an oven, raise the temperature to 200°C, and keep it warm for 12 hours.

[0037] d. After the reaction kettle was cooled to room temperature, the lower black dispersion system was taken out, and impurities were removed by centrifugal washing with deionized water three times to obtain copper-zinc-tin-s...

Embodiment 3

[0039] a. Prepare the following two solutions respectively:

[0040] Solution A: Weigh 0.02mol Cu(acac) 2 (copper acetylacetonate), 0.04mol S, 0.002mol SbCl 3 In a 20ml polytetrafluoroethylene reactor filled with 10mol ethylenediamine, ultrasonically dissolve for 10 minutes.

[0041] Solution B: Weigh 0.01mol Zn(NO 3 ) 2 , 0.01molSnSO 4 In a 25ml beaker filled with 4ml deionized water, sonicate for 10 minutes.

[0042] b. Pour solution B into a 20ml reaction kettle containing solution A, rinse the beaker with 2ml of water and pour it into the reaction kettle, and ultrasonically dissolve the reaction kettle with 16ml of solution for 10 minutes.

[0043] c. Seal the reaction kettle and put it into an oven, raise the temperature to 200 degrees Celsius, and keep it warm for 24 hours.

[0044] d. After the reaction kettle was cooled to room temperature, the lower black dispersion system was taken out, and impurities were removed by centrifugal washing with deionized water thr...

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Abstract

A preparation method for a CZTS nano-particle material belongs to the technical field of materials. The method comprises the following steps: first, respectively preparing a reaction system A (dissolving copper salt, antimonic salt and elemental sulfur in ethylene diamine in an ultrasonic manner) and a reaction system B (a water solution of zinc salt and tin salt); then, mixing the system A and the system B in an ultrasonic manner, sealing and heating to 200 DEG C; keeping the the temperature for 7-24 hours for reaction; finally, taking black powder at the lower layer, and obtaining a target product through centrifugation and washing. According to the invention, a moderate amount of an antimony compound is added to allow copper ions and Sb ions to react with the sulfur so as to generate a mobile-phase copper-antimony-sulfur compound and to promote the growth of Cu2ZnSnS4; meanwhile, the crystal grain dimensions of the Cu2ZnSnS4 nano particles are more uniform. The prepared CZTS nano-particle is good in crystallinity, has no other impurity phase, and is more uniform in dimension distribution; the reaction time is greatly shortened under the action of the mobile phase; only sealing and heating equipment is required during the preparation process, so that the preparation steps are simple, and mass production is achieved.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a preparation method of a copper-zinc-tin-sulfur nanometer powder material. Background technique [0002] Photovoltaic solar energy is considered by the industry to be an ideal energy source in the future due to its irreplaceable characteristics such as greenness, environmental protection, portability, and inexhaustibility. Among them, Cu 2 ZnSnS 4 (referred to as CZTS) thin-film solar cells are considered by the industry to be a very promising photovoltaic material. [0003] Compared with other types of solar cells, CZTS thin-film solar cells have the following advantages: First, the visible light absorption coefficient is high, which can be as high as 10 5 cm -1 Magnitude. Second, the battery device is very thin and consumes very little material. The thickness of the entire device of a thin-film solar cell is only a few microns, so it is very suitable for use in special en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00B82Y30/00
Inventor 张庶孙一灵向勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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