A method for repairing silver grid wire electrodes of crystalline silicon solar cells

A technology of crystalline silicon solar cells and wire electrodes, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of difficult control of the growth rate of the electroplated silver layer, poor surface quality of grid lines, and easy formation of flaky crystals, etc., to avoid Further recession, excellent surface quality, rapid thickening effect

Active Publication Date: 2021-10-26
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the growth rate of the electroplated silver layer obtained in this way is not easy to control, and it is easy to form flaky crystals, and the surface quality of the grid lines is poor.

Method used

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  • A method for repairing silver grid wire electrodes of crystalline silicon solar cells
  • A method for repairing silver grid wire electrodes of crystalline silicon solar cells
  • A method for repairing silver grid wire electrodes of crystalline silicon solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] According to the method disclosed in the national standard GB 11010-1989, the conversion efficiency of waste crystalline silicon solar cells is tested. The test conditions are: the solar radiation spectrum is AM1.5, and the sunlight irradiance is 1000W / m 2 , the test temperature is 25°C, the result is 8.22%;

[0058] Rinse the waste crystalline silicon solar cell tested above with deionized water for 30 minutes, dry it, and then place the packaging plate opposite to the positive electrode surface of the waste crystalline silicon solar cell. The shape of the packaging plate is suitable for the surface of the positive electrode, and the material is glass. Seal the gap with adhesive tape to obtain a positive-sealed waste crystalline silicon solar cell;

[0059] Add 250 mL of silver nitrate aqueous solution with a concentration of 0.4 mol / L dropwise to 500 mL of an aqueous solution of ammonium sulfate with a concentration of 2 mol / L, keep the aqueous solution of ammonium su...

Embodiment 2

[0067] According to the method of Example 1, the conversion efficiency of the waste crystalline silicon solar cell used in this example was tested, and the result was 9.13%;

[0068] Rinse the waste crystalline silicon solar cell tested above with deionized water for 30 minutes, dry it, and then place the packaging plate opposite to the positive electrode surface of the waste crystalline silicon solar cell. The shape of the packaging plate is suitable for the surface of the positive electrode, and the material is glass. Seal the gap with adhesive tape to obtain a positive-sealed waste crystalline silicon solar cell;

[0069] 250mL concentration of 2mol / L silver nitrate aqueous solution is added dropwise to 500mL concentration of 1mol / L ammonium sulfate aqueous solution, the dropwise addition process maintains the ammonium sulfate aqueous solution stirring state, then drips 250mL concentration of 0.8mol / L glucose aqueous solution, Obtain primary electroless silver plating liqui...

Embodiment 3

[0076] According to the method of Example 1, the conversion efficiency of the waste crystalline silicon solar cell used in this example was tested, and the result was 7.35%;

[0077] Rinse the waste crystalline silicon solar cell tested above with deionized water for 30 minutes, dry it, and then place the packaging plate opposite to the positive electrode surface of the waste crystalline silicon solar cell. The shape of the packaging plate is suitable for the surface of the positive electrode, and the material is glass. Seal the gap with adhesive tape to obtain a positive-sealed waste crystalline silicon solar cell;

[0078] Add 250mL of silver nitrate aqueous solution with a concentration of 0.8mol / L dropwise to 500mL of ammonium sulfate aqueous solution with a concentration of 2mol / L. During the dropping process, keep the ammonium sulfate aqueous solution in a stirring state, and then add 250mL of glucose aqueous solution with a concentration of 0.4mol / L dropwise. , obtain p...

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Abstract

The invention provides a method for repairing silver grid wire electrodes of crystalline silicon solar cells, belonging to the field of crystalline silicon solar cells. In the present invention, light-induced chemical silver plating treatment is first performed on the damaged silver grid wire electrodes of crystalline silicon solar cells, so that silver can be effectively filled into the gaps in the original silver grid wire electrodes, and on the surface and the position where the silver grid wire electrodes fall off Forming a layer of high-density silver seed film, followed by electroplating silver treatment, not only can realize the rapid thickening of the silver seed film, but also can avoid the generation of oriented silver platelets, effectively improve the surface quality of the silver coating, and thus obtain a large High aspect ratio recycled silver grid electrodes. In addition, the method of the present invention does not need to carry out high-temperature treatment to the battery, which can avoid further degradation of battery performance, and will not damage other parts of the crystalline silicon solar cell (such as the anti-reflection film (silicon nitride or silicon oxide layer) during the repair process. )) cause damage, which can effectively improve the recycling rate of waste crystalline silicon solar cells.

Description

technical field [0001] The invention relates to the technical field of crystalline silicon solar cells, in particular to a method for repairing silver grid wire electrodes of crystalline silicon solar cells. Background technique [0002] The photovoltaic application market continues to expand, and more and more photovoltaic power generation systems have installed a large number of photovoltaic modules, especially crystalline silicon solar cell photovoltaic modules. With the prolongation of use time, the performance of photovoltaic modules will gradually decline. Recycling components with severe performance degradation can not only solve the problem of environmental damage caused by waste components, but also bring certain additional economic value. At present, the recovery and treatment methods for waste crystalline silicon solar cells are mainly to recover silicon powder through physical destruction or to recover silicon wafers through chemical corrosion treatment, but the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/02C23C18/44C25D3/46H01L31/0224H01L31/18
CPCC23C18/44C23C28/023C25D3/46H01L31/022425H01L31/18Y02E10/50Y02P70/50
Inventor 莫丽玢赵雷王文静
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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