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Improvement method of silk screen printing work procedure in silicon ribbon solar cell preparation process

A silicon solar cell and screen printing technology, applied in the field of solar cells, can solve the problem of high fragmentation rate of silicon cells, and achieve the effect of solving the problem of fragmentation rate and solving the high defect rate

Inactive Publication Date: 2012-06-27
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for improving the screen printing process in the preparation process of solar cells with silicon. Buffering is carried out, which effectively solves the problem of a very high fragmentation rate of silicon cells in the screen printing process

Method used

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  • Improvement method of silk screen printing work procedure in silicon ribbon solar cell preparation process
  • Improvement method of silk screen printing work procedure in silicon ribbon solar cell preparation process
  • Improvement method of silk screen printing work procedure in silicon ribbon solar cell preparation process

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Experimental program
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Effect test

Embodiment 1

[0018] The manufacturing process of solar cells with silicon in the existing process usually includes the following processes: acid cleaning, texturing→phosphorus diffusion→wet back junction removal, edge engraving→PECVD method to make SiNx anti-reflection layer→screen printing to make back electrode→baking Dry → silk screen printing to make back electric field → drying → screen printing to make positive electrode → high temperature sintering to form metal contact → test sorting.

[0019] Such as Figure 5 As shown, in the process of making the back electrode by screen printing, making the back electric field by screen printing and making the positive electrode by screen printing, the screen printing is carried out on the screen printing machine table with an elastic polymer layer, in which the elastic The polymer layer 3 is laid on the table 4 of the screen printing machine.

[0020] The elastic polymer layer is made of highly elastic ethylene-vinyl acetate copolymer EVA, an...

Embodiment 2

[0027] The manufacturing process of solar cells with silicon in the existing process usually includes the following processes: acid cleaning, texturing→phosphorus diffusion→wet back junction removal, edge engraving→PECVD method to make SiNx anti-reflection layer→screen printing to make back electrode→baking Dry → silk screen printing to make back electric field → drying → screen printing to make positive electrode → high temperature sintering to form metal contact → test sorting.

[0028] Such as Figure 5 As shown, in the process of making the back electrode by screen printing, making the back electric field by screen printing and making the positive electrode by screen printing, the screen printing is carried out on the screen printing machine table with an elastic polymer layer, in which the elastic The polymer layer 3 is laid on the table 4 of the screen printing machine.

[0029] The elastic polymer layer is made of silicone rubber, and the elastic polymer layer is cover...

Embodiment 3

[0035] The manufacturing process of solar cells with silicon in the existing process usually includes the following processes: acid cleaning, texturing→phosphorus diffusion→wet back junction removal, edge engraving→PECVD method to make SiNx anti-reflection layer→screen printing to make back electrode→baking Dry → silk screen printing to make back electric field → drying → screen printing to make positive electrode → high temperature sintering to form metal contact → test sorting.

[0036] Such as Figure 5 As shown, in the process of making the back electrode by screen printing, making the back electric field by screen printing and making the positive electrode by screen printing, the screen printing is carried out on the screen printing machine table with an elastic polymer layer, in which the elastic The polymer layer 3 is laid on the table 4 of the screen printing machine.

[0037] The elastic polymer layer is made of thermoplastic polyurethane elastomer TPU, and the elast...

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Abstract

The invention discloses an improvement method of a silk screen printing work procedure in a silicon ribbon solar cell preparation process. The silk screen printing work procedure comprises the following steps of silk screen printing back electrode manufacture, silk screen printing back electric field manufacture and silk screen printing positive electrode manufacture, and the silk screen printing work procedure is carried out on a silk screen printing machine table top containing an elastic high-molecular layer, the elastic high-molecular layer is paved on a metal table top of a silk screen printing machine. According to the method, the silicon ribbon solar cell silk screen printing table top containing the elastic high molecular layer is adopted, the printing pressure in the silk screening printing process is buffered, and the problem of very high chip breaking rate of silicon ribbon solar cells in the silk screen printing process is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to an improved method for the screen printing process in the preparation process of solar cells with silicon. Background technique [0002] Introduction to the preparation process of String RibbonTM materials: String Ribbon Sheet Growth (String Ribbon Sheet Growth) was invented by Professor Emmanuel Sachs of MIT University in the United States, and was originally named Edge Stabilized Ribbon and Edge Stabilized Growth Law (Edge Stabilized Growth). Evergreen Solar Inc. of the United States realized industrialized production technology and manufactured the first batch of commercial modules with silicon cells in early 1997. figure 1 Shown is the schematic diagram of the growth crystal of polycrystalline ribbon silicon, in which 11 is the melt; 12 is the ribbon; 13 is the solid solution surface; 14 is the growth direction; the ribbon silicon technology was developed by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M1/12B41F15/34H01L31/18
CPCY02P70/50
Inventor 班群沈辉
Owner SUN YAT SEN UNIV
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