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A two-component lead-free glass powder suitable for front silver paste of crystalline silicon cells

A lead-free glass powder, crystalline silicon battery technology, applied in circuits, photovoltaic power generation, electrical components and other directions, can solve the problems of small adhesion between film and substrate, narrow silver paste sintering window range, low battery conversion efficiency, etc. Achieve the effect of improving adhesion and ensuring conversion efficiency

Active Publication Date: 2020-08-04
上海银浆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2) The adhesion between the film layer and the substrate is relatively small;
[0008] 3) The sintering window range of silver paste is relatively narrow;
[0009] 4) The application range of cell square resistance is relatively narrow;
[0010] 5) The battery conversion efficiency is low

Method used

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  • A two-component lead-free glass powder suitable for front silver paste of crystalline silicon cells
  • A two-component lead-free glass powder suitable for front silver paste of crystalline silicon cells
  • A two-component lead-free glass powder suitable for front silver paste of crystalline silicon cells

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The two glass powders prepared above are uniformly mixed according to 75% glass powder B and 25% glass powder, and then the mixed two-component glass powder is mixed with 2%, silver powder 90%, and organic carrier 8% to prepare a finished slurry , According to the application process of the paste, print, sinter and test the terminal performance. The final data is shown in the following table:

[0048]

Embodiment 2

[0050] The two glass powders prepared above are uniformly mixed by 90% glass powder B and 10% glass powder, and then the mixed two-component glass powder is prepared by 2%, silver powder 90%, and organic carrier 8% to prepare a finished slurry , According to the application process of the paste, print, sinter and test the terminal performance. The final data is shown in the following table:

[0051]

Embodiment 3

[0053] The two glass powders prepared above are uniformly mixed by 70% glass powder B and 30% glass powder, and then the mixed two-component glass powder is prepared by 2%, silver powder 90%, and organic carrier 8% to prepare a finished slurry , According to the application process of the paste, print, sinter and test the terminal performance. The final data is shown in the following table:

[0054]

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Abstract

The invention discloses a two-component lead-free glass powder for silver paste on the front surface of a crystalline silicon photovoltaic cell. The two-component lead-free glass powder is prepared from two glass powders in a certain ratio. A formula for a glass powder B comprises 25 to 50% of Bi2O3, 30 to 45% of TeO2, 1 to 5% of SiO2, 5 to 15% of WO3, 1 to 5% of Nb2O5, 2 to 7% of Sr2CO3 and 0 to 6% of P2O5. A formula for the other glass powder M comprises 60 to 80% of Bi2O3, 15 to 25% of H3BO3, 0.1 to 4% of ZnO, 0 to 3% of Al2O3, 2 to 8% of CeO2, 0.1 to 5% of MoO3 and 5 to 10% of Y2O3. The two-component lead-free glass powder for the silver paste on the front surface of the crystalline silicon photovoltaic cell is free of lead, friendly to environment, high in adhesion, wide in the range of a sintering window and good in sheet resistance practicality.

Description

Technical field [0001] The invention relates to the field of new materials, in particular to a two-component lead-free glass powder suitable for silver paste on the front side of a crystalline silicon battery. Background technique [0002] As a lead-free glass powder for front silver paste, the glass powder mainly becomes a molten state during high-temperature sintering. This state can promote the metallization of the silver powder and ensure that the silver film layer is sintered with silicon Adhesion of the substrate. In addition, the glass powder can penetrate the SiNx layer on the front of the crystalline silicon cell well during the high temperature process, so that the silver film layer and the silicon substrate form good contact. The glass powder used in the existing front silver paste is basically a one-component glass powder and a lead-containing system. The disadvantage of this system is that the glass powder contains heavy metal lead element, and the silver film layer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00C03C6/04C03C6/00H01B1/02H01L31/0224
CPCC03C1/00C03C12/00H01B1/02H01L31/022425Y02E10/50
Inventor 陈小龙乔亮赵佳琪
Owner 上海银浆科技有限公司
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