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Solution and method for one-step electrodeposition of Cu2ZnSnS4 (CZTS) prefabricated layer film

A copper-zinc-selenide-sulfur electrodeposition technology, which is applied in the solution field of one-step electrodeposition copper-zinc-selenium-sulfur prefabricated layer film, can solve the problems of difficult element ratio control, high Cu content ratio, poor film quality, etc., and achieve crystallization quality improvement , easy to operate, avoid the effect of using S source

Inactive Publication Date: 2015-11-11
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Among them, one-step electrodeposition of CZTS quaternary compounds is an effective method to solve the above problems. However, the currently reported Cu, Zn, Sn, and S solutions that use hydroxy acid salts as complexes have poor stability and will generate Cu + Ions, resulting in poor quality of the deposited film, difficult to control the proportion of elements, high Cu content ratio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The solution for one-step electrodeposition of copper zinc selenium sulfur prefabricated film is composed of metal salt, thiosulfate, conductive salt, hydroxy acid, thiourea derivative, stabilizer, brightener and solvent water. The preparation process:

[0026] 1. Prepare saturated solutions of copper sulfate, zinc sulfate, sodium thiosulfate, and sodium chloride for use, and prepare a 0.2mol / L stannous chloride solution with hydrochloric acid for use.

[0027] 2. Add metal salt solution, citric acid solution, and thiourea in deionized water in order to make a concentration of 0.002mol / L copper sulfate, 0.002mol / L stannous chloride, 0.008mol / L zinc sulfate, 0.1mol / L sulfur Urea, 0.1mol / L citric acid solution.

[0028] 3. After the solution is stable, add sodium chloride, sodium thiosulfate, hydroquinone and sorbitol and stir thoroughly. The final solution components are 0.002mol / L copper sulfate, 0.002mol / L stannous chloride, 0.008mol / L L zinc sulfate, 0.1mol / L thioure...

Embodiment 2

[0031] The method for one-step electrodeposition copper-zinc-selenium-sulfur prefabricated film comprises the following process:

[0032] 1. Pour the electrodeposition solution prepared in Example 1 into the electroplating tank, use platinum mesh as the anode, glass / molybdenum as the substrate electrode, and the saturated calomel electrode (SCE) as the reference electrode, and connect the three-electrode system circuit.

[0033] 2. Turn on the power, adjust the potential to -1.5V (vs. SCE), and keep it for 30min~1h.

[0034] 3. Turn off the power, take out the sample and rinse it with deionized water, blow dry with nitrogen, and complete the preparation of the CZTS prefabricated layer film.

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Abstract

The invention relates to a solution and method for one-step electrodeposition of a Cu2ZnSnS4 (CZTS) prefabricated layer film, and belongs to the technical field of CZTS films. The solution for one-step electrodeposition of the CZTS prefabricated layer film comprises 0.001-0.005 mol / L of metal salt, 0.03-0.1 mol / L of thiosulfate, 0.1-0.4 mol / L of conducting salt, 0.01-0.5 mol / L of hydroxy acid, 0.01-0.5 mol / L of thiourea derivative and 1-5 g / L of stabilizer, wherein the pH value of the solution is 1-6.0. The method for one-step electrodeposition of the CZTS prefabricated layer film includes the steps that (1) the solution for preparing the CZTS prefabricated layer film is placed in a plating bath; (2) a three-electrode system is used for connecting a power controller, a reference electrode, a conducting substrate and an inertia anode, and a salt bridge is used for connecting a reference electrode solution and an electrodeposition solution; (3) a power supply is on, and a constant potential method is used for conducting codeposition on Cu, Zn, Sn and S; and (4) the deposited CZTS prefabricated layer film is taken out, washed and dried. The solution and method are simple and practical, stable in solution system, simple in technology, easy to operate, safe, environmentally friendly and suitable for large-area preparation of the CZTS films.

Description

technical field [0001] The invention belongs to the technical field of CZTS thin films, in particular to a solution and a method for one-step electrodeposition of copper-zinc-selenium-sulfur prefabricated thin films. Background technique [0002] Currently, CuZnSeS (Cu 2 ZnSnS 4 , referred to as CZTS) thin-film solar cell materials can be prepared by a variety of methods, the electrodeposition method is one of its non-vacuum preparation processes, which has the characteristics of simple process, small initial investment, high uniformity in large area, and easy precise control of elements. The preparation methods of electrodeposited CZTS film materials are mostly: one-step or step-by-step electrodeposition of Cu, Zn, Sn metals (CN201310040588.9) and their alloys in citric acid system and pyrophosphoric acid system as the prefabricated layer for preparing CZTS film, and then through CZTS film materials with semiconductor properties were prepared by high temperature post-sulf...

Claims

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Application Information

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IPC IPC(8): C25D3/58C25D5/00
Inventor 张超李微纪伟伟王赫杭伟乔在祥
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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