Synthetic method for Cu2ZnSnS4 photosensitive thin-film material
A copper-zinc-tin-sulfur and photosensitive thin film technology, applied in tin compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as reducing the possibility of large-scale commercial production, and achieve easy control of film thickness, good consistency and The effect of uniformity and fast growth rate
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[0025] The steps of the preparation method of the copper-zinc-tin-sulfur film of the present invention:
[0026] 1) Preparation of copper, zinc, tin and sulfur nanoparticle solution
[0027] Step 1. Analyze pure purity copper sulfate pentahydrate crystals, zinc sulfate heptahydrate crystals, tin sulfate dihydrate crystals, and sodium sulfide nonahydrate crystals at a molar ratio of 2:1:1:4.
[0028] Step 2. Add the copper sulfate pentahydrate crystals, zinc sulfate heptahydrate crystals, and tin sulfate dihydrate crystals weighed in step 1 to an appropriate amount of ethylene glycol of analytical purity to obtain a zinc sulfate molar concentration of 5-15 millimoles / L of solution A. The organic solvent here can be any one of ethylene glycol, ethanol, methanol, propanol, butanol, tert-butanol, isopropanol, isoamyl alcohol and n-butanol, but is not limited thereto;
[0029] Step 3. Add the sodium sulfide nonahydrate crystals weighed in step 1 to an appropriate amount of ethylene glyco...
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[0041] Examples:
[0042] Step 1. Analyze pure purity copper sulfate pentahydrate crystals, analyze pure purity zinc sulfate heptahydrate crystals, and add tin sulfate dihydrate crystals to the analytical purity ethylene glycol in a molar ratio of 2:1:1. Prepare solution A with a molar concentration of zinc sulfate of 10 mmol / L;
[0043] Step 2. Put the solution A obtained in step 1 into a 100 ml small flask and heat it to 190°C. At the same time, high-purity argon (purity>) is introduced into the solution at a flow rate of 2 ml / min. 99.99%);
[0044] Step 3. Dissolve sodium sulfide nonahydrate crystals of analytical purity in 10 ml of ethylene glycol of analytical purity (equal to the amount of ethylene glycol used in step 1), the copper sulfate pentahydrate crystals, sulfuric acid heptahydrate The molar ratio of zinc crystals, tin sulfate dihydrate crystals, and sodium sulfide nonahydrate crystals is 2:1:1:4;
[0045] Step 4. Add the solution obtained in Step 3 dropwise to the solu...
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