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Solar cell preparation method and solar cell piece

A solar cell and cell technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems affecting cell power generation efficiency, cell loss, micro-cracks, etc.

Inactive Publication Date: 2021-05-18
苏州索雷特自动化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, laser scribing is usually used to cut solar cells, which has the following problems: the heat-affected zone at the cutting line is relatively large, which affects the power generation efficiency of the cell; there are cutting grooves, and the grooves caused by cutting grooves loss, resulting in a decrease in the power generation area of ​​the cell; there are micro-cracks in the cutting groove, which are prone to cracks

Method used

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  • Solar cell preparation method and solar cell piece
  • Solar cell preparation method and solar cell piece
  • Solar cell preparation method and solar cell piece

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Some, but not all, embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] The inventors of the present invention have found that: when cutting traditional solar cell sheets, cutting grooves will inevitably be produced, and the loss of the groove body caused by cutting the grooves will reduce the power generation area of ​​the cell sheet; A heat-affected zone will be formed on the side, which will affect the power generation efficiency...

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Abstract

The invention discloses a solar cell preparation method and a solar cell piece, and relates to the technical field of solar cell processing. After a silicon wafer is cut and a damaged layer is removed and before texturing is carried out on the surface of the silicon wafer, focusing scanning is carried out in the silicon wafer through a focusing laser beam, so that a modified layer and a hole are formed in the silicon wafer in the laser focus scanning direction. According to the solar cell preparation method and the solar cell piece provided by the invention, the cross section of the prepared solar cell piece is neat, micro cracks and cutting grooves are avoided, and a heat affected zone is avoided.

Description

technical field [0001] The invention relates to the technical field of solar cell processing, in particular to a method for preparing a solar cell and a solar cell sheet. Background technique [0002] The development of photovoltaic technology promotes the continuous growth of industries related to solar cell strings, and the demand for solar cells is also increasing. In the production process of solar cells, large cells need to be cut to form required cell sizes. [0003] At present, laser scribing is usually used to cut solar cells, which has the following problems: the heat-affected zone at the cutting line is large, which affects the power generation efficiency of the cell; there are cutting grooves, and the grooves caused by cutting grooves loss, resulting in a reduction in the power generation area of ​​the cell; there are micro-cracks in the cutting groove, which are prone to cracks. [0004] Therefore, it is of great significance to design a new cell preparation or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18B23K26/38
CPCB23K26/38H01L31/1804B23K2101/36Y02P70/50Y02E10/547
Inventor 王会娜
Owner 苏州索雷特自动化科技有限公司
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