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Solar battery

A solar cell and electrical connection technology, applied in the field of solar cells, can solve problems such as poor hole collection efficiency

Active Publication Date: 2019-08-23
NEO SOLAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, there is no back electric field formed between the bus electrode 210 of the conventional shingled solar cell 220 and the semiconductor substrate 201, so that the holes formed near the top of the bus electrode 210 must diffuse a relatively long distance to reach the bus electrode 210. The back electric field region 207 on one side also has the problem of poor hole collection efficiency in the local area above the bus electrode 210

Method used

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Embodiment Construction

[0097] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0098] Please refer to Figure 9 to Figure 11 , are respectively a schematic diagram of laser scoring, a schematic partial cross-sectional view, and a schematic diagram of hole collection of the solar cell according to the first embodiment of the present invention, which depict a solar cell 300, which is aimed at the aforementioned traditional shingled solar cell 200 As an improvement, this embodiment can also be used in the improvement of the aforementioned conventional shingled solar cell 220 .

[0099] The semiconductor substrate 201 of the solar cell 300 may be a P-type semiconductor substrate doped with a P-type dopant (such as boron, a group IIIA element), and has a front side 2011 and a back side 2012 . In this embodiment, the front side 2011 refers to the main light-receiving surface of the solar cell 300 when it is w...

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Abstract

The present invention provides a solar cell including a semiconductor substrate. The back surface of the semiconductor substrate is provided with a passivation layer, a bus electrode and a back electrode layer. The bus electrode is electrically connected to the back surface of the semiconductor substrate through a bus electrode opening of the passivation layer, and the back electrode layer is electrically connected to the back surface of the semiconductor substrate via the first opening group and a second opening group of the passivation layer, wherein the first opening group and the second opening group are sequentially arranged at one side of the bus electrode opening, and a distance between first openings in the first opening group is smaller than a distance between second openings in the second opening group in a direction perpendicular to the length of the bus electrode.

Description

technical field [0001] The invention relates to a solar cell, in particular to a back electrode structure of the solar cell. 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] Silicon solar cells with high conversion efficiency that have been published so far include Hetero-junction with Intrinsic Thin Layer solar cells (HIT, Hetero-junction with Intrinsic Thin Layer), interdigitated back electrode ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224
CPCH01L31/022425H01L31/022441Y02E10/50
Inventor 黄俊智
Owner NEO SOLAR POWER CORP