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Solar cell and production method thereof

A technology of solar cells and back electrodes, which is applied in the field of solar cells to achieve the effect of improving smoothness, large resistance and uniform resistance

Pending Publication Date: 2021-04-30
ZHEJIANG AIKO SOLAR ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present disclosure provide a solar cell and a method for producing a solar cell to solve, or at least partially solve, the above-mentioned and other potential problems in conventional solar cells

Method used

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  • Solar cell and production method thereof
  • Solar cell and production method thereof
  • Solar cell and production method thereof

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Embodiment Construction

[0046] The present disclosure will now be described with reference to a few example embodiments. It should be understood that these embodiments are only described for the purpose of enabling those skilled in the art to better understand and thus realize the present disclosure, rather than to limit the scope of the technical solutions of the present disclosure.

[0047] As used herein, the term "comprising" and variations thereof are to be read as open-ended terms meaning "including but not limited to". The term "based on" is to be read as "based at least in part on". The terms "one embodiment" and "an embodiment" should be read as "at least one embodiment." The term "another embodiment" should be understood as "at least one other embodiment". Other definitions, both express and implied, may be contained below. Definitions of terms are consistent throughout the specification, unless the context clearly dictates otherwise.

[0048] Due to the presence of grooves in the back ...

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Abstract

The invention relates to a solar cell with a back slotting structure, and a production method thereof. The solar cell (100) includes: a silicon substrate (40); a back passivation film (50) formed on the surface of the silicon substrate (40), wherein the back passivation film (50) includes a plurality of grooves (60) formed therein and parallel to each other; and a back electrode formed on the back passivation film (50), wherein the back electrode includes a main gate (80) and a sub-gate (70), the sub-gate (70) is in contact with the silicon substrate (40) via the plurality of grooves (60), and the main gate (80) is formed in a region (55) of the back passivation film (50) that does not have the plurality of grooves (60). According to the embodiment of the invention, the smoothness of carrier flow on the back surface can be improved, and the EL dark fringe phenomenon is eliminated.

Description

technical field [0001] The present disclosure relates to the technical field of solar cells, in particular to a solar cell with a grooved back structure and a production method thereof. Background technique [0002] Impurities and defects inside and on the surface of the silicon wafer will increase the carrier recombination rate of the solar cell and have a negative impact on the conversion efficiency of the cell. In traditional solar cells, a silicon nitride anti-reflection / passivation film is set on the front of the silicon wafer, and a P+Al back electric field is set on the back to achieve a certain front and back passivation effect. However, the passivation effect of the Al back electric field is relatively weak, which hinders the further improvement of the battery efficiency. [0003] Passivated Emitter and Rear Cell (PERC) technology deposits a rear passivation film on the back of the silicon wafer to achieve a good passivation effect. While reducing the recombinatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/0216H01L31/068H01L31/18
CPCH01L31/022441H01L31/02167H01L31/0682H01L31/0684H01L31/1868Y02E10/547Y02P70/50
Inventor 石强丰明璋林纲正陈刚
Owner ZHEJIANG AIKO SOLAR ENERGY TECH CO LTD