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Solar cell and manufacturing method thereof

A technology of solar cells and manufacturing methods, applied in the direction of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve the problems of reducing battery performance, restricting battery efficiency, improving and other issues

Active Publication Date: 2019-06-14
CHINT NEW ENERGY TECH (HAINING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, due to the relatively large width of the electrode region, most of the region in the electrode region is not covered by the electrode after the electrode is formed in the electrode region, and this part of the region not covered by the electrode is heavily doped, so This leads to serious recombination in this part of the area, which leads to the reduction of battery performance and restricts the improvement of battery efficiency.

Method used

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  • Solar cell and manufacturing method thereof
  • Solar cell and manufacturing method thereof
  • Solar cell and manufacturing method thereof

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Embodiment 1

[0059] The invention provides a method for manufacturing solar cells, which is mainly suitable for the production of SE cells. Please refer to figure 2 , figure 2 is a flowchart of a method for manufacturing a solar cell according to a specific embodiment of the present invention. As shown, the manufacturing method includes:

[0060] In step S101, a silicon substrate is provided and a textured structure is formed on the surface of the silicon substrate, wherein the front electrode area on the front side of the silicon substrate for printing front electrodes includes a first central area and first two side areas ;

[0061] In step S102, a first heavily doped region is formed in part or all of the first central region, a second heavily doped region is formed in a part of the first two side regions, and A first lightly doped region is formed in a region other than the first heavily doped region and the second heavily doped region on the front side of the silicon substrate, wh...

Embodiment 2

[0087] The invention also provides a solar battery, specifically an SE battery. The solar cell consists of:

[0088] A silicon substrate, the front side of the silicon substrate includes a front electrode area for printing front electrodes, and the front electrode area includes a first central area and first two side areas;

[0089] A first heavily doped region, a second heavily doped region, and a first lightly doped region, the first heavily doped region is formed in part or all of the first central region, the second heavily doped region impurity regions are formed in partial regions of the first two side regions, and the first lightly doped region is formed on the front side of the silicon substrate between the first heavily doped region and the second heavily doped region In other regions, wherein, the type of impurity doped in the first heavily doped region, the second heavily doped region and the first lightly doped region is opposite to the type of the silicon substra...

Embodiment 3

[0108] The invention also provides a solar cell manufacturing method, which is suitable for the production of SE-PERC cells. The manufacturing method includes:

[0109] In step S201, a silicon substrate is provided and a textured structure is formed on the surface of the silicon substrate, wherein the front electrode area on the front side of the silicon substrate for printing front electrodes includes a first central area and first two side areas ;

[0110] In step S202, a first heavily doped region is formed in part or all of the first central region, a second heavily doped region is formed in a part of the first two side regions, and the A first lightly doped region is formed in a region other than the first heavily doped region and the second heavily doped region on the front side of the silicon substrate, wherein the first heavily doped region, the second heavily doped region The type of doping impurities in the double doped region and the first lightly doped region is ...

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PUM

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Abstract

The invention provides a manufacturing method of a solar cell. The manufacturing method comprises the steps of: forming a textured structure on the surface of a silicon substrate, wherein an electroderegion at the front side of the silicon substrate comprises a central region and bilateral regions; forming a first heavy doped region in at least part of the central region, forming second heavy doped regions in parts of the bilateral regions, and forming light doped regions in other regions, wherein doping concentration of the first heavy doped region is greater than or equal to those of the second heavy doped regions; or forming the first heavy doped region in at least part of the central region, forming the second heavy doped regions in all of the bilateral regions, and forming the lightdoped regions in other regions, wherein the doping concentration of the first heavy doped region is greater than those of the second heavy doped regions; and forming an antireflection layer, a front side electrode and a back electrode. The invention further provides a solar cell. By implementing the manufacturing method and the solar cell which are provided by the invention, surface compounding ofthe cell can be reduced, and conversion efficiency of the cell is improved.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a solar cell and a manufacturing method thereof. Background technique [0002] In the manufacturing process of high-efficiency solar cells, in order to achieve good contact between the electrodes and the silicon wafer, the electrodes are often prepared on a specific area of ​​the silicon wafer by screen printing. For example, Selective Emitter Solar Cell (hereinafter referred to as SE battery), passivated emitter back local diffusion battery (Passivated Emitter and Rear Locally-diffused, hereinafter referred to as PERL battery), passivated emitter all Passivated Emitter and Rear Total-diffused (hereinafter referred to as PERT battery). [0003] The SE cell includes a silicon substrate, an anti-reflection layer, a front electrode and a back electrode. The anti-reflection layer is arranged on the front side of the silicon substrate, the front electrode forms ohmic contact w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/0352H01L31/068
CPCY02E10/547Y02P70/50
Inventor 殷涵玉何胜黄海燕陆川
Owner CHINT NEW ENERGY TECH (HAINING) CO LTD