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MWT (metal wrap through) back-contact solar cell, preparation method and module thereof

A metal wrap-through, solar cell technology, applied in electrical components, circuits, photovoltaic power generation, etc., can solve the problems of increasing fragmentation rate, reducing yield, reducing battery conversion efficiency, etc., and achieving the effect of simple preparation method and low fragmentation rate

Inactive Publication Date: 2012-07-25
WUXI SUNTECH POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The implementation steps of the groove will increase the manufacturing cost of the solar cell and reduce the conversion efficiency of the cell, especially the laser isolation may lead to an increase in the fragmentation rate in the subsequent module preparation process and reduce the yield

Method used

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  • MWT (metal wrap through) back-contact solar cell, preparation method and module thereof
  • MWT (metal wrap through) back-contact solar cell, preparation method and module thereof
  • MWT (metal wrap through) back-contact solar cell, preparation method and module thereof

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Embodiment Construction

[0074] The following introduces some of the possible embodiments of the present invention, which are intended to provide a basic understanding of the present invention, but are not intended to identify key or decisive elements of the present invention or limit the scope of protection. It is easy to understand that, according to the technical solution of the present invention, those skilled in the art may propose other alternative implementation manners without changing the essence and spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0075] In the drawings, for the sake of clarity, the thickness of layers or the area of ​​regions may be exaggerated, but as a schematic diagram, it should not be regarde...

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Abstract

The invention provides an MWT (metal wrap through) back-contact solar cell, a preparation method and a module thereof, belonging to the field of photovoltaic techniques. The MWT back-contact solar cell comprises a first conductive type area, a second conductive type area, an auxiliary gate electrode, a through hole, a main gate electrode and a second electrode, wherein the first conductive type area is arranged on the back surface of a cell substrate, the second conductive type area is arranged on the front surface of the cell substrate, and the contact between the main gate electrode and the cell substrate is set as a non-ohmic contact, or an insulating layer is also arranged between the main gate electrode and the cell substrate so as to realize the electrical isolation of positive and negative electrodes of the cell. Therefore, the solar cell is simple in preparation method and high in conversion efficiency, a step of forming an isolation channel is omitted, and the breakage rate of a corresponding cell preparation module is low.

Description

technical field [0001] The invention belongs to the field of photovoltaic technology, and in particular relates to a metal wrap through (Metal Wrap Through, MWT) back contact solar cell, a preparation method and an assembly thereof. Background technique [0002] Due to the limited supply of conventional energy and the increase in environmental protection pressure, many countries in the world have set off an upsurge in the development and utilization of solar energy and renewable energy, and solar energy utilization technology has developed rapidly. The use of electric energy is becoming more and more extensive. The solar cell is one of the most common devices used to convert solar energy into electrical energy. In practical applications, the basic application unit is generally a battery module composed of multiple solar cells connected in series (welded and connected in series with interconnecting bars). [0003] Generally, a solar cell includes a pn junction, and the inte...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/04H01L31/18H01L31/068
CPCH01L31/02245Y02E10/50Y02E10/547
Inventor 艾凡凡王玉林蔡昭周杰宋剑杨健陈如龙张光春
Owner WUXI SUNTECH POWER CO LTD
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