Process for electrodeposition preparation of cuprous sulfocyanide film in aqueous solution

A cuprous thiocyanate and electrodeposition technology, which is applied in circuits, electrical components, and final product manufacturing, etc., can solve the problems of low conductivity, high price, and dye desorption of pure organic electrolytes, and achieves easy control of the production process, The effect of good hole filling and high deposition efficiency

Inactive Publication Date: 2007-09-19
TIANJIN UNIV
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Problems solved by technology

[0005] At present, the main problems in the preparation of CuSCN thin films by electrodeposition are: (1) The electrolyte uses organic liquids as solvents, such as ethanol, acetone, etc., so the main raw materials must use organic groups or bulky anions with high solubility in organic solvents. Copper salts, such as copper tetrafluoroborate, etc., most of these materials are relatively expensive, which increases the manufacturing cost
In addition, waste organic matter will also cause environmental pollution problems.
(2) Due to the low conductivity of the pure organic electrolyte, the deposition efficiency of the film is low, so a small amount of water is usually added, which brings problems to the long-term stability of the electrodeposition solution
The unstable precipitation of the deposition solution will change the composition of the deposition solution, affect the quality of the deposited film, and replace the deposition solution to cause waste of raw materials
(3) Due to the low conductivity of the pure organic electrolyte, the electric field distribution on the deposition surface is uneven, and the uniformity and density of the film decrease.
(4) At present, most dyes (such as bipyridyl ruthenium) used in dye-sensitized solar cells are alcohol-soluble, and electrodeposition in organic electrolytes will lead to desorption of dyes and reduce cell efficiency.

Method used

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  • Process for electrodeposition preparation of cuprous sulfocyanide film in aqueous solution

Examples

Experimental program
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Effect test

example 1

[0037] Weigh 2 parts of Cu(CH3 COO) 2 , 4 parts of disodium ethylenediaminetetraacetic acid (EDTA), 1 part of KSCN, where Cu(CH 3 COO) 2 / EDTA=0.5, Cu(CH 3 COO) 2 / KCN=2.0: Dissolve the three substances weighed in 1000 parts of deionized aqueous solution, and then adjust the pH value to 2.1; the prepared solution is ready for use after 4 hours of static complexation and homogenization. Before deposition, ethanol, 0.1M NaOH and deionized water were used to 2 o 3 -SnO 2 Conductive glass (ITO) is cleaned and dried for use. A platinum sheet was used as an auxiliary electrode, a saturated Ag / AgCl electrode was used as a reference electrode, the temperature of the solution was lowered to 15°C, and the CuSCN film was obtained by depositing at -0.6V (relative to the saturated Ag / AgCl electrode) for 5 minutes. The deposited CuSCN film was rinsed with deionized water, dried at 90°C in vacuum and then tested. It was found that the electrodeposited CuSCN film had a thickness of ab...

example 2

[0039] Weigh 25 parts of CuSO 4 ·5H 2 O, 11 parts of oxalic acid, 1.6 parts of NaSCN, where CuSO 4 ·5H 2 O / .oxalic acid=2.3, CuSO 4 ·5H 2 O / NaSCN=15.5: Dissolve the weighed three substances in 1000 parts of deionized aqueous solution respectively, and adjust the pH value to 3; the prepared solution is ready for use after 24 hours of static complexation and homogenization. Before deposition, ethanol, 0.1M NaOH and deionized water were used to 2 o 3 -SnO 2 Conductive glass (ITO) is cleaned and dried for use. A platinum sheet was used as an auxiliary electrode, a saturated Ag / AgCl electrode was used as a reference electrode, the temperature of the solution was controlled at 35°C, and a CuSCN film was deposited at -0.6V (relative to the saturated Ag / AgCl electrode) for 10 minutes. The deposited CuSCN film was rinsed with deionized water, dried at 90°C in vacuum and then tested. It was found that the electrodeposited CuSCN film had a thickness of about 2 μm, a crystal grai...

example 3

[0041] Weigh 12.5 parts of CuSO respectively 4 ·5H 2 O, 10.5 parts of citric acid, 2.4 parts of KSCN, wherein CuSO 4 ·5H 2 O / oxalic acid = 1.2, CuSO 4 ·5H 2 O / KSCN=5.2: Dissolve the weighed three substances in 1000 parts of deionized aqueous solution respectively, and adjust the pH value to 4.6: The prepared solution is ready for use after 24 hours of static complexation and homogenization. Before deposition, ethanol, 0.1M NaOH and deionized water were used to 2 o 3 -SnO 2 Conductive glass (ITO) is cleaned and dried for use. A platinum sheet was used as an auxiliary electrode, a saturated Ag / AgCl electrode was used as a reference electrode, the temperature of the solution was controlled at 25°C, and a CuSCN film was deposited at -0.5V (relative to the saturated Ag / AgCl electrode) for 10 minutes. The deposited CuSCN film was rinsed with deionized water, dried at 90°C in vacuum and then tested. It is found that the electrodeposited CuSCN film has a thickness of about 1 ...

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Abstract

The water solution electrodepositing process of preparing cuprous thiocyanate (CuSCN) film includes the following steps: dissolving copper salt, thiocyanate and chelate in certain proportion into water as solvent; regulating the pH value to 2-7 to obtain electrolyte solution for electrodeposition; static complexing and homogenizing of the electrolyte solution for 4-72 hr; cleaning the base for electrodeposition with organic solvent, acid solution, alkali solution and water; and electrodepositing in common electrochemical deposition process. The electrochemical deposition process has temperature 15-75 deg.c and deposition potential from 0.2 v to -0.65 v. The deposited CuSCN film is water washed and dried at 60-100 deg.c. The present invention has the features of high stability of the electrodepositing solution, high depositing efficiency, low cost, less pollution and being suitable for various kinds of base material.

Description

technical field [0001] The invention relates to a method for preparing cuprous thiocyanate film by electrodeposition in aqueous solution. Background technique [0002] With the rapid development of China and the world economy, the demand for energy has increased dramatically. The environmental pollution caused by the increasing consumption of fossil energy, such as coal, oil and natural gas, and the continuous deterioration of the global climate caused by greenhouse gas emissions have attracted great attention from all countries in recent years. Various countries, including China, have begun to formulate corresponding policies to strengthen the research and development of green and renewable energy. In the 21st century China's sustainable development strategy white paper "China's 21st Century Agenda", it is mentioned that "renewable energy is the foundation of future energy", "priority is given to the development of renewable energy in the national ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/04H01L31/0256H01L31/18
CPCY02P70/50
Inventor 靳正国武卫兵华缜
Owner TIANJIN UNIV
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