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Preparation method of lead-free and bismuth-free conductive silver paste, silver grid wire and silicon solar cell

A technology of silicon solar cells and solar cells, applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., can solve the problems of easy desorption of electrodes, inability to obtain large-scale industrial applications, and low efficiency of silver paste advanced questions

Active Publication Date: 2017-09-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using Bi 2 o 3 The silver paste made of glass powder cannot be used in large-scale industrial applications due to low efficiency and easy desorption of electrodes.

Method used

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  • Preparation method of lead-free and bismuth-free conductive silver paste, silver grid wire and silicon solar cell
  • Preparation method of lead-free and bismuth-free conductive silver paste, silver grid wire and silicon solar cell
  • Preparation method of lead-free and bismuth-free conductive silver paste, silver grid wire and silicon solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First, lead-free and bismuth-free glass powder is prepared. Take SnO powder 4.3g and P 2 o 5 Powder 10.7g, these solid powders were uniformly mixed in a glove box filled with nitrogen. Next, put the obtained solid mixture into a quartz tube and vacuumize, heat at 900°C for 30 minutes, and put the obtained molten mixture into ionized water to quench. Finally, the obtained solid was ball-milled at a speed of 350 rpm for 3 hours with a planetary ball mill, and the obtained glass powder was used for the preparation of silver paste.

[0033] Next, prepare lead-free and bismuth-free solar cell conductive silver paste. Silver powder, ethyl cellulose and the above-mentioned lead-free and bismuth-free glass powder were mixed in a mass ratio of 80:2.5:4.5, and then ball milled for 3 hours at a speed of 350 revolutions per minute using a planetary ball mill, and the mixture obtained by ball milling was 8.7 g and 1.3g of α-terpineol are uniformly mechanically mixed to obtain le...

Embodiment 2

[0037] First, lead-free and bismuth-free glass powder is prepared. Take SnO powder 8.4g and P 2 o 5 Powder 6.6g, these solid powders were uniformly mixed in a glove box filled with nitrogen. Next, put the obtained solid mixture into a quartz tube and vacuumize, heat at 900°C for 30 minutes, and put the obtained molten mixture into ionized water to quench. Finally, the obtained solid was ball-milled at a speed of 350 rpm for 3 hours with a planetary ball mill, and the obtained glass powder was used for the preparation of silver paste.

[0038] Next, prepare lead-free and bismuth-free solar cell conductive silver paste. Silver powder, ethyl cellulose and the above-mentioned lead-free and bismuth-free glass powder were mixed in a mass ratio of 80:2.5:4.5, and then ball milled for 3 hours at a speed of 350 revolutions per minute using a planetary ball mill, and the mixture obtained by ball milling was 8.7 g and 1.3g of α-terpineol are uniformly mechanically mixed to obtain lea...

Embodiment 3

[0042] First, lead-free and bismuth-free glass powder is prepared. Take SnO powder 9.1g and P 2 o 5 Powder 5.9g, these solid powders were uniformly mixed in a glove box filled with nitrogen. Next, put the obtained solid mixture into a quartz tube and vacuumize, heat at 1000°C for 30 minutes, and put the obtained molten mixture into ionized water to quench. Finally, the obtained solid was ball-milled at a speed of 350 rpm for 3 hours with a planetary ball mill, and the obtained glass powder was used for the preparation of silver paste.

[0043] Next, prepare lead-free and bismuth-free solar cell conductive silver paste. Silver powder, ethyl cellulose and the above-mentioned lead-free and bismuth-free glass powder were mixed in a mass ratio of 80:2.5:4.5, and then ball milled for 3 hours at a speed of 350 revolutions per minute using a planetary ball mill, and the mixture obtained by ball milling was 8.7 g and 1.3g of α-terpineol are uniformly mechanically mixed to obtain le...

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Abstract

The invention relates to a lead-free and bismuth-free conductive silver paste. The lead-free and bismuth-free conductive silver paste includes: 50-80% of conductive silver powder, 1-10% of glass powder, 1-10% of organic resin, and 10-30% of organic solvent, wherein the glass powder is lead-free and bismuth-free glass powder, and the mass percent of SnO in the glass powder is 28-80%. The invention also relates to a method for preparing a silver grid line of a silicon solar cell by employing the above lead-free and bismuth-free conductive silver paste and a silicon solar cell. The glass powder is lead-free and bismuth-free and employs SnO as the main body, thus, the conductive silver paste employing the glass powder is lead-free and bismuth-free, a silicon nitride anti-reflecting layer on the surface of the silicon solar cell can be etched through in a sintering process, and the electrode silver grid line with low ohmic contact resistance can be formed on the surface of the solar cell after sintering.

Description

technical field [0001] The invention relates to the field of crystalline silicon solar cells, in particular to a silicon solar cell anode conductive silver paste, a method for preparing a silicon solar cell electrode silver grid wire by using the conductive silver paste, and a silicon solar cell. Background technique [0002] Energy is the foundation of national economic development. Traditional fossil fuels such as coal, oil, and natural gas have limited reserves and inevitably cause environmental pollution during use. As a sustainable and clean energy, solar energy has gained attention and development in many countries in recent decades. Solar cells have the advantages of being able to directly convert solar energy into electrical energy, have no moving parts in the system, and are easy to use, so they have become an important renewable energy device. [0003] At present, solar cells include crystalline silicon solar cells, dye-sensitized solar cells, organic solar cells...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/16H01B1/22H01L31/0224
CPCH01B1/16H01B1/22H01L31/022425Y02E10/50
Inventor 李亮亮蒋佳初武涛
Owner TSINGHUA UNIV
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