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Method for treating electric leakage of surface of silicon solar battery

A silicon solar cell and leakage region technology, which is applied to circuits, electrical components, sustainable manufacturing/processing, etc., can solve problems such as uneven thickness of the reflective film, and achieve the effect of simple and easy method and obvious effect.

Inactive Publication Date: 2011-04-27
SIMAX SUZHOU GREEN NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] 4. The diffusion layer and SiNx see the uneven thickness of the reflective film:

Method used

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  • Method for treating electric leakage of surface of silicon solar battery
  • Method for treating electric leakage of surface of silicon solar battery
  • Method for treating electric leakage of surface of silicon solar battery

Examples

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Embodiment 1

[0044] A method for treating surface leakage of silicon solar cells, the process steps are as follows:

[0045] (1) Add a reaction voltage to a P-dang battery, use an infrared thermal imager to find the location of the leakage area, and mark the location of the leakage area;

[0046] (2) Apply the corrosion solution on the leakage area, and remove the leakage area by corrosion. The time for corrosion to remove the leakage area is 10 minutes; the proportion of the corrosion solution is as follows: 100ml of deionized water, 150ml of hydrogen fluoride, nitric acid 100 ml.

Embodiment 2

[0048] A method for treating surface leakage of silicon solar cells, the process steps are as follows:

[0049] (1) Add a reaction voltage to a P-dang battery, use an infrared thermal imager to find the location of the leakage area, and mark the location of the leakage area;

[0050] (2) Apply the corrosion solution to the leakage area, and remove the leakage area by corrosion. The time for corrosion to remove the leakage area is 30 minutes; the proportion of the corrosion solution is as follows: 120 ml of deionized water, 160 ml of hydrogen fluoride, Nitric acid 90ml.

Embodiment 3

[0052] A method for treating surface leakage of silicon solar cells, the process steps are as follows:

[0053] (1) Add a reaction voltage to a P-dang battery, use an infrared thermal imager to find the location of the leakage area, and mark the location of the leakage area;

[0054] (2) Apply the corrosion solution on the leakage area, and remove the leakage area by corrosion. The time for corrosion to remove the leakage area is 5 minutes; the proportion of the corrosion solution is as follows: 80 ml of deionized water, 140 ml of hydrogen fluoride, Nitric acid 110 ml.

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Abstract

The invention discloses a method for treating electric leakage of a surface of a silicon solar battery, which comprises the following process steps: detecting and marking the position of an electric leakage region; and coating a corrosive liquid in the position of the electric leakage region for removing the electric leakage region by corrosion, wherein the corrosive liquid comprises the following components: 80-120 parts of deionized water, 140-160 parts of hydrogen fluoride and 90-110 parts of nitric acid. In the invention, the mixed solution of nitric acid and hydrofluoric acid is used for removing the electric leakage region of the surface by corrosion, the method can be realized simply and easily, and the effect is obvious. The invention solves the problems that because the electric leakage is serious and the parallel resistance of the battery is too small, the battery can not be used in a photovoltaic module, and the battery efficiency is lowered.

Description

technical field [0001] The invention relates to the field of silicon solar cells, in particular to a method for treating surface leakage of silicon solar cells [0002] Methods. Background technique [0003] The PN junction on the surface of the solar cell will produce many defects during the manufacturing process. These defects cannot be removed by edge etching. The collected current will pass through these defects and leak to another defect without passing through the load. The area containing these defects Known as the surface leakage region. The surface leakage area of ​​the solar cell has a great influence on the performance of the battery. The leakage will increase the reverse current, reduce the maximum power, open circuit voltage, and fill factor, thereby reducing the efficiency of the battery. In addition, the parallel resistance of the battery with serious leakage is too small to prevent used in photovoltaic modules. [0004] The distribution of the surface leak...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 沈少杰
Owner SIMAX SUZHOU GREEN NEW ENERGY