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Two-component lead-free glass powder for silver paste on front surface of crystalline silicon photovoltaic cell

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

Active Publication Date: 2017-10-20
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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  • Two-component lead-free glass powder for silver paste on front surface of crystalline silicon photovoltaic cell
  • Two-component lead-free glass powder for silver paste on front surface of crystalline silicon photovoltaic cell
  • Two-component lead-free glass powder for silver paste on front surface of crystalline silicon photovoltaic cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0048]

Embodiment 2

[0050] Mix the above two prepared glass powders evenly with 90% glass powder B and 10% glass powder, and then prepare the finished slurry with 2% of the mixed two-component glass powder, 90% of silver powder and 8% of organic carrier , Print, sinter and test terminal performance according to the application process of the paste. The final data is shown in the table below:

[0051]

Embodiment 3

[0053] Mix the above two prepared glass powders evenly with 70% glass powder B and 30% glass powder, and then prepare the finished slurry with 2% of the mixed two-component glass powder, 90% of silver powder and 8% of organic carrier , Print, sinter and test terminal performance according to the application process of the paste. The final data is shown in the table below:

[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 front silver paste of crystalline silicon batteries. Background technique [0002] As a lead-free glass powder for the front silver paste, the glass powder is mainly in a molten state during high-temperature sintering, which can promote the metallization of the silver powder and ensure that the silver film layer is sintered. Substrate adhesion. In addition, the glass frit can well penetrate the SiNx layer on the front of the crystalline silicon battery during the high temperature process, so that the silver film layer can form a good contact with the silicon substrate. The glass powder used in the existing front silver paste is basically a single-component glass powder, and it is a lead-containing system. The disadvantage of this system is that the glass powder contains lead elements of heavy metals, and the silver film layer and t...

Claims

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Application Information

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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