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Solar cell and manufacturing method of back electrodes thereof

A technology for solar cells and back electrodes, which is applied in the fields of final product manufacturing, sustainable manufacturing/processing, circuits, etc., and can solve problems such as the decrease in conversion efficiency of solar cells, the increase in power generation costs, and the reduction in wattage of power generation

Active Publication Date: 2016-12-07
UNITED RENEWABLE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

further reference figure 2 , is the dislocation schematic diagram (2), when the degree of dislocation has caused the corrosion hole 92 ablated by the laser to not be completely covered by the back electrode 91, even if only a small part of the corrosion hole 92 is not completely covered by the back electrode 91, the solar energy The conversion efficiency of the battery will still drop significantly
In the field of solar cells, even if the conversion efficiency is only reduced by 0.1%, since the power generation of solar power plants is measured in millions of watts, the total power generation wattage will be significantly reduced, resulting in an increase in the cost of power generation per watt

Method used

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  • Solar cell and manufacturing method of back electrodes thereof
  • Solar cell and manufacturing method of back electrodes thereof
  • Solar cell and manufacturing method of back electrodes thereof

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Embodiment Construction

[0063] The method for manufacturing the back electrode of the solar cell in this embodiment will be described below, and it should be noted here that the description sequence of the following steps is not intended to limit the implementation sequence of this embodiment.

[0064] Please refer to Figure 3 to Figure 5 , are respectively the flow chart of the manufacturing method of the back electrode of the solar cell, the schematic diagram of the screen process (1) and the schematic diagram of the back electrode of the solar cell (1). In step S01 , a semiconductor substrate 101 is provided. The provided semiconductor substrate 101 is doped with a first-type dopant (eg, P-type dopant), and has a first surface 1011 and a second surface 1012 opposite to the first surface. When processed into finished solar cells in the future, the second surface 1012 is used as a light-receiving surface, and the first surface 1011 is a light-receiving surface or a non-light-receiving surface. Suc...

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Abstract

A solar cell and manufacturing method of back electrodes thereof are disclosed. The method includes a step of implementing a screen printing process to a semiconductor substrate. The method also includes a step of measuring a deviation which exists between laser ablation recesses and back electrodes in the screen printing process. The method further includes a step of adjusting the distance between the laser ablation recess and the back electrode according to the deviation. After adjusting, a deviation between laser ablation recesses and back electrodes will be controlled to a narrower range when the screen printing process is implemented to another semiconductor substrate. Thus, the defect is caused by the back electrodes incompletely covering the laser ablation recesses can be improved significantly.

Description

technical field [0001] The invention relates to a method for manufacturing a solar cell and a back electrode thereof. Background technique [0002] Solar cells are currently the most mature and widely used green energy technology. In order to improve the power generation efficiency of solar cells and reduce the cost of power generation, various solar cell structures have been continuously developed. Solar cells can be roughly divided into three types: silicon-based solar cells, compound semiconductor solar cells and organic solar cells. Among them, silicon-based solar cells are the most mature and popular technology, especially the conversion efficiency of silicon single crystal solar cells is the highest. The crown of all solar cells. [0003] At present, there are as many as a dozen silicon solar cells with high conversion efficiency published, among which there are roughly heterojunction junction with intrinsic silicon thin film solar cells (HIT, Hetero-junction with Int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/068H01L31/18
CPCH01L31/022425H01L31/1804Y02E10/547Y02P70/50
Inventor 裴善庄黄绍玮徐伟智
Owner UNITED RENEWABLE ENERGY CO LTD