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Method for repairing crystalline silicon solar cell with leaky edges

A technology of solar cells and edge leakage, which is applied in the direction of circuits, electrical components, semiconductor devices, etc., can solve the problems of four main grids that cannot be calibrated, and achieve the effect of strong operability

Inactive Publication Date: 2013-09-04
ALTUSVIA ENERGY TAICANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a high-precision repair method for edge leakage of crystalline silicon solar cells for the defect that the four-busbar label cannot be calibrated in the prior art

Method used

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  • Method for repairing crystalline silicon solar cell with leaky edges
  • Method for repairing crystalline silicon solar cell with leaky edges
  • Method for repairing crystalline silicon solar cell with leaky edges

Examples

Experimental program
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Embodiment 1

[0020] see figure 1 and figure 2 As shown, first, vertically fix the edge leakage cell on a bracket 11 and connect it to a DC power supply. Since the leakage area of ​​the battery sheet 1 will heat up after being connected to the DC power supply, the specific location of the leakage can be easily confirmed by using a thermal imager 2. Then manually use sandpaper 3 to grind the edge of the cell leakage and re-test. If the leakage and efficiency of the cell reach the normal value, the grinding is successful, and the cell can be produced normally. If the leakage and efficiency do not reach the normal value, continue grinding. until it reaches the normal value.

[0021] see image 3 and Figure 4 As shown, the leakage and conversion efficiency of the edge leakage cells with dirty or unetched edges reached the level of normal cells after being sanded, and the appearance also met the control standards of normal cells.

[0022] The method for repairing the edge leakage of crysta...

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PUM

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Abstract

The invention discloses a method for repairing a crystalline silicon solar cell with leaky edges. The method comprises the following steps: S1, the solar cell with leaky edges is connected to a direct-current power source, and the specific locations of the leaky edges of the solar cell are confirmed through a thermal imager; S2, leaky areas on the edges of the solar cell is polished with abrasive paper. The method for repairing the crystalline silicon solar cell with the leaky edges is simple and easy to use and strong in operability. Leakage occurs on the edges of the solar cell when the edges of the solar cell are not etched completely or are not etched at all, however, the leakage and conversion efficiency of the solar cell would reach the level of normal solar cells after the solar cell is polished with the abrasive paper, and the outer appearance of the solar cell meets the control standards of normal solar cells.

Description

technical field [0001] The invention belongs to the detection field of crystalline silicon solar cells, and relates to a method for repairing edge leakage of crystalline silicon solar cells. Background technique [0002] The production of crystalline silicon solar cells is divided into six processes: texturing, diffusion, etching, cleaning, coating and screen printing. The N-type area of ​​phosphorus. If the N-type area is not removed or removed incompletely, the front and back of the cell will be conductive, resulting in leakage at the edge of the cell, reducing the quality of the cell, and may cause equipment failure during the actual production process of the production line. , personnel operation, special gas fluctuations and other reasons lead to abnormal operation of the etching process, resulting in unclean or unetched edges. Such silicon wafers will produce a large number of defective products after coating and screen printing. [0003] Therefore, there is a need fo...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 黄勇白杰闫新春陈龙梁汉杰张满良安丹陆宇峰
Owner ALTUSVIA ENERGY TAICANG
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