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A method for preparing se battery with segmented mask pattern

A mask pattern, segmented technology, applied in the manufacture of circuits, electrical components, final products, etc., can solve the problems of high cost and large consumption of SE etching mask slurry

Inactive Publication Date: 2015-09-23
TIANWEI NEW ENERGY HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] In order to overcome the technical defects of large consumption of SE etching mask slurry and high cost in the traditional SE battery manufacturing process, the present invention provides a method for preparing SE batteries with segmented mask patterns

Method used

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  • A method for preparing se battery with segmented mask pattern
  • A method for preparing se battery with segmented mask pattern
  • A method for preparing se battery with segmented mask pattern

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 2 , the thin grid line 1 is divided into segmented fine grid lines composed of a:b=1:1 from the straight-through type, and each segmented SE mask paint coverage area adopts a rectangular shape, and the segmented SE mask paint coverage The distribution between the regions can be arranged in a regular hexagon, so that the electrons in all the emission regions can be absorbed within the shortest distance, that is, within the radius of an equal circle with the center of the segmented SE mask coating area as the center. Collected by fine grid electrodes connected to the paint coverage area of ​​each segmented SE mask. This solution can reduce 50% of the SE etching mask fine grid line slurry consumption while ensuring the conversion efficiency.

Embodiment 2

[0058] Such as image 3 , the thin grid lines are divided into segmental SE masking paint coverage areas composed of a:b=1:6.26 by straight-through type, each segment adopts a circular shape, and the distribution between segmental SE masking paint coverage areas can be Arranged in a regular hexagon, so that the electrons in all emission regions can be within the shortest distance, that is, less than or equal to the radius of the equal-diameter circle centered on the center of the segmented SE mask paint coverage area, by each segmented fine grid collected by wire electrodes. This solution can reduce 86.2% of the SE etching mask fine grid line slurry consumption while ensuring the conversion efficiency.

Embodiment 3

[0060] Such as Figure 4 , the thin grid line SE mask paste pattern is divided into a segmented SE mask coating area composed of a:b=3:1 by a straight-through type, and each segment adopts a bamboo-shaped shape, and the segmented SE mask coating The distribution between the coverage areas can be arranged in a regular hexagon, so that the electrons in all the emission areas can be separated by each segment within the shortest distance, that is, within the radius of the equidiameter circle centered on the center of the fine grid line. Collected by fine-grid electrodes connected to the SE mask paint footprint. This solution can reduce 33.3% of the SE etching mask fine grid line slurry consumption while ensuring the conversion efficiency.

[0061] In each of the above embodiments, a is the length of the segmented SE mask coating area, and b is the distance between two adjacent segmented SE mask coating areas. It can be seen that the SE slurry saving effect of Example 2 is the bes...

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Abstract

The invention discloses a method for preparing an SE (Selective Emitter) solar cell by utilizing a sectional type mask graph. The method comprises the step of forming an SE mask graph on a diffusing surface by utilizing an SE etching mask sizing agent, wherein the part, which corresponds to a thin grid line, of an SE mask is in a sectional type discontinuous shape, thus forming a sectional type SE mark coating covering region. According to the method for preparing the SE solar cell by utilizing the sectional type mask graph, the traditional straight-through type SE mark coating covering region is changed into multiple sectional type SE mark coating covering regions according to a certain rule through an SE etching mask, the purpose that the transfer efficiency of a battery piece is guaranteed or improved is achieved, meanwhile, the dosage of the SE sizing agent is reduced, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of solar cell manufacturing and relates to a method for preparing SE cells with segmented mask patterns. Background technique [0002] Among the many parameters of solar cells, the emitter is one of the parameters that can most affect the conversion efficiency. Appropriately increasing the sheet resistance can increase the open circuit voltage and short circuit current, but in the screen printing method, the contact resistance between the Ag (silver) electrode and the emitter with low surface doping concentration is relatively large, which will eventually cause the conversion efficiency to decrease due to the decrease of the fill factor. reduce. In order to take into account the needs of open circuit voltage, short circuit current and fill factor at the same time, selective emitter cells, that is, SE structure solar cells are an ideal choice, that is, heavy doping is carried out at the contact part of the electrodes,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 黄智李质磊隋海波侯林钧徐涛盛雯婷张凤鸣
Owner TIANWEI NEW ENERGY HLDG
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