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Method for processing large series resistance of crystalline silicon solar cell

A technology of solar cells and series resistors, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of reduced conversion efficiency of cells, lower battery quality, scrapped cells, etc., and achieve the effect of returning to normal conversion efficiency

Inactive Publication Date: 2014-10-29
JIANGXI UNIEX NEW ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the manufacturing process of crystalline silicon solar cells, due to process fluctuations, abnormal auxiliary materials, and equipment abnormalities, the series resistance (Rs) of the cells is too large, which reduces the conversion efficiency of the cells, thereby reducing the quality of the cells, and even making the cells scrapped

Method used

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  • Method for processing large series resistance of crystalline silicon solar cell

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Effect test

Embodiment 1

[0008] A method for dealing with the large series resistance of crystalline silicon solar cells, which consists of configuring 0.01% mass concentration of hydrofluoric acid solution and 0.01% mass concentration of ammonium bifluoride solution, controlling the temperature at 18°C, mixing the two solutions, and connecting the series resistance Soak the larger cells in the mixed solution for 2 seconds, rinse the soaked cells in pure water for 0.5 min, take them out and dry them.

Embodiment 2

[0010] A method for dealing with excessively large series resistance of crystalline silicon solar cells, which consists of configuring 0.05% mass concentration of hydrofluoric acid solution and 0.1% mass concentration of ammonium bifluoride solution, controlling the temperature at 24°C, mixing the two solutions, and dissolving the series resistance Soak the larger cells in the mixed solution for 3 seconds, put the soaked cells in pure water for 1.5 minutes, take them out and dry them.

Embodiment 3

[0012] A method for dealing with excessively large series resistance of crystalline silicon solar cells, which consists of configuring 0.1% mass concentration of hydrofluoric acid solution and 0.2% mass concentration of ammonium bifluoride solution, controlling the temperature at 30°C, mixing the two solutions, and making the series resistance Soak the larger cells in the mixed solution for 5 seconds, put the soaked cells in pure water for 2 minutes, take them out and dry them.

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Abstract

The invention discloses a method for processing large series resistance of a crystalline silicon solar cell. The method for processing the large series resistance of the crystalline silicon solar cell includes that using a chemical method to process the surface of the crystalline silicon solar cell with large series resistance (Rs) to lower the contact resistance between positive silver paste and a silicon wafer of the cell with large series resistance so as to restore the series resistance (Rs) of the cell to a normal level, and the conversion efficiency is restored to a normal level.

Description

technical field [0001] The invention relates to a method for dealing with relatively large series resistance of crystalline silicon solar cells, belonging to the field of crystalline silicon solar cells. Background technique [0002] At present, in the manufacturing process of crystalline silicon solar cells, due to process fluctuations, abnormal auxiliary materials, and equipment abnormalities, the series resistance (Rs) of the cells is too large, which reduces the conversion efficiency of the cells, thereby reducing the quality of the cells, and even making the cells scrapped . Contents of the invention [0003] The purpose of the present invention is to provide a method for dealing with large series resistance of crystalline silicon solar cells, by using a chemical method to treat the surface of crystalline silicon solar cells with large series resistance (Rs) to reduce the resistance of cells with large Rs The contact resistance between the front silver paste and the ...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCH01L31/1804H01L31/186Y02E10/547Y02P70/50
Inventor 柳杉黄明王鹏黄治国张伟杨晓琴殷建安梅超
Owner JIANGXI UNIEX NEW ENERGY CO LTD
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