High-viscosity solar cell front side silver paste and method for producing the same
A solar cell and high-viscosity technology, applied in cable/conductor manufacturing, circuits, adhesives, etc., can solve the problems of reducing the photoelectric conversion efficiency of solar cells, reducing the light-receiving area of the surface of solar cells, and increasing the shading area of the surface of solar cells to achieve shading The effect of small area, high photoelectric conversion efficiency, and high aspect ratio
Inactive Publication Date: 2008-09-24
EGING PHOTOVOLTAIC TECHNOLOGY CO LTD
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Problems solved by technology
However, the viscosity of this kind of system is small at present, the fluidity of the slurry is good, and the grid line collapses on the surface of the silicon wafer after printing, which increases the shading area of the solar cell surface, reduces the light-receiving area of the solar cell surface, and reduces the solar energy per unit area. Photoelectric conversion efficiency of the battery
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[0019] The embodiment of high viscosity solar cell front silver paste of the present invention is shown in the following table:
[0020]
[0021] The parameters of the high-viscosity solar cell front silver paste produced according to the above-mentioned examples are as follows: maximum particle diameter≤15 μm; average particle diameter≤9 μm; viscosity 220-300Pa.s; solid content 81-83.5wt%; square resistivity≤ 4mΩ / □; sintering temperature 850-950℃.
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Abstract
The invention relates to a high viscosity solar cell front silver serum and a preparation method thereof. The composition and the weight ratio of the high viscosity solar cell front silver serum are that conductive silver powder accounts for 75-85 percent, glass glue accounts for 2-10 percent, organic carrier accounts for 5.5-20 percent, the particle size of the conductive silver powder is 0.2-2mum; the composition and the weight ratio of the glass glue are that Bi2O3 accounts for 65-85 percent, SiO2 accounts for 5-20 percent, PbO accounts for 1-15 percent and Al2O3 accounts for 1-5 percent. After such processes are carried out by the serum as screen printing, low temperature drying and high temperature sintering, the aspect ratio of a conducting electrode formed on the surface of solar cell is high, the solar cell produced by using the method has small front shading area and high photoelectric conversion efficiency.
Description
Technical field: [0001] The invention relates to a raw material for producing a conductive electrode of a solar cell, in particular to a front silver paste of a solar cell and a preparation method thereof. Background technique: [0002] A solar cell is a semiconductor device that can convert solar energy into electrical energy. Under the condition of light, a photogenerated current will be generated inside the solar cell, and the electrical energy can be directly output through the electrodes. [0003] In order to extract the photo-generated current generated by the solar cell, positive and negative electrodes must be made on the surface of the solar cell. Commonly used electrode manufacturing processes include magnetron sputtering, vacuum evaporation and screen printing sintering, etc., but the production costs of magnetron sputtering and vacuum evaporation methods are too high and the economy is poor. At present, lead-containing solar cell conductive silver paste is widel...
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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/18H01B1/22H01B13/00C09J1/00C08L1/28C08L33/02C08L91/00
CPCY02P70/50
Inventor 荀建华孙铁囤潘盛刘志刚
Owner EGING PHOTOVOLTAIC TECHNOLOGY CO LTD
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