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Method for preparing cadmium telluride material through electrochemical deposition

A cadmium telluride, electrochemical technology, applied in the electrolysis process, electrolysis components, etc., can solve the problems of low deposition efficiency and high comprehensive cost, and achieve the effects of high deposition efficiency, low preparation cost and short preparation cycle

Inactive Publication Date: 2018-02-27
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deposition efficiency of this method is low and the overall cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing cadmium telluride material by electrochemical deposition, comprising the following steps:

[0025] (1) Mix and stir sodium hydroxide and ultrapure water until the solid is dissolved, then add coarse tellurium dioxide powder, heat up to 70°C, stir and react for 30min, then add cleaning agent, continue to react at 70°C, react for 1h and then cool to 40°C, filter while it is hot, and cool the filtrate to room temperature to obtain a mixed solution A; wherein, the mass ratio of sodium hydroxide, ultrapure water, and coarse tellurium dioxide powder is 1:2:1; the cleaning agent is sodium sulfide ; The amount of cleaning agent added is 3% of the mass of the coarse tellurium dioxide powder;

[0026] (2) Mix and stir cadmium chloride and ultrapure water until the solid dissolves to obtain a cadmium chloride solution; wherein, the mass ratio of the cadmium chloride and ultrapure water is 1:1; coarse tellurium dioxide powder, chlorine The mass ratio of cadm...

Embodiment 2

[0029] A method for preparing cadmium telluride material by electrochemical deposition, comprising the following steps:

[0030] (1) Mix and stir sodium hydroxide and ultrapure water until the solid is dissolved, then add coarse tellurium dioxide powder, heat up to 90°C, stir and react for 10min, then add cleaning agent, continue to react at 90°C, react for 1h and then cool to 40°C, filter while it is hot, and cool the filtrate to room temperature to obtain a mixed solution A; wherein, the mass ratio of sodium hydroxide, ultrapure water, and coarse tellurium dioxide powder is 1:6:5; the cleaning agent is thio Acetamide; the amount of cleaning agent added is 8% of the mass of the thick tellurium dioxide powder;

[0031] (2) Mix and stir cadmium chloride and ultrapure water until the solid dissolves to obtain a cadmium chloride solution; wherein, the mass ratio of the cadmium chloride and ultrapure water is 1:3; coarse tellurium dioxide powder, chlorine The mass ratio of cadmiu...

Embodiment 3

[0034] A method for preparing cadmium telluride material by electrochemical deposition, comprising the following steps:

[0035] (1) Mix and stir sodium hydroxide and ultrapure water until the solid is dissolved, then add coarse tellurium dioxide powder, heat up to 75°C, stir and react for 25min, then add cleaning agent, continue to react at 75°C, react for 1h and then cool to 40°C, filter while it is hot, and cool the filtrate to room temperature to obtain a mixed solution A; wherein, the mass ratio of sodium hydroxide, ultrapure water, and coarse tellurium dioxide powder is 1:3:2; the cleaning agent is thiocyanate ammonium acid; the amount of cleaning agent added is 4% of the mass of the coarse tellurium dioxide powder;

[0036] (2) Mix and stir cadmium chloride and ultrapure water until the solid dissolves to obtain a cadmium chloride solution; wherein, the mass ratio of the cadmium chloride and ultrapure water is 1:1.5; thick tellurium dioxide powder, chlorine The mass ra...

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Abstract

The invention discloses a method for preparing a cadmium telluride material through electrochemical deposition. The method for preparing the cadmium telluride material through electrochemical deposition comprises the following steps that sodium hydroxide and ultrapure water are mixed, then coarse tellurium dioxide powder is added, the temperature is increased to 70-90 DEG C, and the stirring reaction is conducted for 10-30 min; then a cleaning agent is added, the reaction continues to be conducted for 1h, the mixture is cooled to the temperature of 40 DEG C, the filtrate is cooled to the roomtemperature, and thus mixed liquor A is obtained; cadmium chloride and ultrapure water are mixed and stirred to prepare a cadmium chloride solution, the mixed liquor and the cadmium chloride solutionare mixed, then an additive is added, stirring is conducted till the solid is completely dissolved, and thus electrolyte is prepared; constant-voltage pre-deposition treatment and constant-current electric deposition treatment are sequentially conducted on the electrolyte, so that an electric deposition product, namely the cadmium telluride, is obtained; and the cadmium telluride material is stripped from an electrode plate, washed to be neutral with ultrapure water, and dried, and thus the finished cadmium telluride material is obtained. According to the method for preparing the cadmium telluride material through electrochemical deposition, coarse tellurium dioxide is used as the raw material, so that the preparation cost of cadmium telluride is greatly reduced, and the stability and purity of the prepared cadmium telluride are good.

Description

Technical field: [0001] The invention relates to the preparation of cadmium telluride materials, in particular to a method for preparing cadmium telluride materials by electrochemical deposition. Background technique: [0002] Cadmium telluride thin-film solar cells are a photovoltaic device that develops rapidly in thin-film solar cells. In 1993, the University of South Florida used the sublimation method in 1cm 2 A solar cell with a conversion efficiency of 15.8% was made in terms of area; subsequently, the CdTe small-area cell researched by Japan's Matsushita Battery had a maximum conversion efficiency of 16% in the laboratory, which became the highest record for cadmium telluride thin-film solar cells at that time. In recent years, the research directions of solar cells are high conversion efficiency, low cost and high stability. One of the keys to making a solar cell with excellent photoelectric performance is to prepare a cadmium telluride material with excellent per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00
CPCC25B1/00
Inventor 陈东进
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD