A kind of solar cell and its manufacturing method

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 battery performance degradation, restriction of battery efficiency, improvement, etc.

Active Publication Date: 2021-01-22
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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  • A kind of solar cell and its manufacturing method
  • A kind of solar cell and its manufacturing method
  • A kind of solar cell and its manufacturing method

Examples

Experimental program
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Effect test

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 method for manufacturing a solar cell, comprising: forming a textured structure on the surface of a silicon substrate, the electrode area on the front side of the silicon substrate includes a central area and two side areas; forming a second electrode in at least part of the central area A heavily doped region, a second heavily doped region is formed in part of the regions on both sides, and a lightly doped region is formed in other regions, the doping concentration of the first heavily doped region is greater than or equal to the second heavily doped region doping concentration; or form a first heavily doped region in at least part of the central region, form a second heavily doped region in all regions on both sides, and form a lightly doped region in other regions, the first The doping concentration of the heavily doped region is greater than that of the second heavily doped region; an antireflection layer, a front electrode and a back electrode are formed. The invention also provides a solar cell. The implementation of the invention can reduce the surface recombination of the battery and improve the conversion efficiency of the battery.

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 Patents(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
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