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Glass powder, front surface silver paste prepared from glass powder used for solar cell, and preparation method for front surface silver paste

A technology for solar cells and glass powder, applied in the field of solar cells, can solve the problems of high square resistance applicability limitation, unfavorable environmental protection, poor contact, etc., and achieve the effects of improving photoelectric conversion efficiency, solving environmental protection, and reducing contact resistance.

Inactive Publication Date: 2016-11-09
SHANGHAI TRANSCOM ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, in order to pursue higher photoelectric conversion efficiency, silicon-based solar cells are all prepared by high surface resistivity technology. Therefore, traditional borosilicate or phosphate series glasses are not suitable for this high surface resistance process.
Even for lead-free tellurite glass, the paste prepared by using it is limited in the applicability of high square resistance, especially on high square resistance single crystal cells, there will be poor contact, EL (electroluminescence) dark spots
[0009] At present, only tellurite glass can be applied to high square resistance and obtain high efficiency, but as mentioned above, it is known to be used in tellurite glass series, which either contains high lead content, which is not conducive to environmental protection, or although it is not Contains lead, but the performance is quite different from that of commercial positive silver

Method used

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  • Glass powder, front surface silver paste prepared from glass powder used for solar cell, and preparation method for front surface silver paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method for a solar cell front silver paste, comprising the following steps:

[0034](1) prepare organic carrier: get mass percentage and be 15% ethyl cellulose resin, mass percentage is 8% rosin resin, and mass percentage is 10% acrylic resin, and adding mass percentage is 67% organic solvent (propylene glycol methyl ether acetate , Ethylene glycol monobutyl ether acetate, butyl carbitol, petroleum ether or one or more mixtures), dissolve at a temperature of 80-150°C while heating and stirring, and after 2 hours, a uniform transparent organic carrier;

[0035] (2) prepare glass powder: get each raw material of following percentage by weight: 90% TeO 2 , 5% Bi 2 o 3 , 2.5% Li 2 O, 2% PbO, 0.5% SiO 2 , mix the above-mentioned raw materials that have been weighed evenly by a mixer, put them in a high-temperature muffle furnace, control the temperature at 800°C to 1400°C, and keep them warm for 1 hour; pour the melted glass melt into deionized water Afte...

Embodiment 2

[0039] A preparation method for a solar cell front silver paste, comprising the following steps:

[0040] (1) prepare organic carrier: get mass percentage and be 15% ethyl cellulose resin, mass percentage is 5% rosin resin, and mass percentage is 10% acrylic resin, and adding mass percentage is 70% organic solvent (propylene glycol methyl ether acetate , Ethylene glycol monobutyl ether acetate, butyl carbitol, petroleum ether or one or more mixtures), dissolve at a temperature of 80-150°C while heating and stirring, and after 2 hours, a uniform transparent organic carrier;

[0041] (2) prepare glass powder: get each raw material of following percentage by weight: 84.5% TeO 2 , 6.5% Bi 2 o 3 , 2.5% Li 2 O, 2.5% PbO, 4% ZnO, after mixing the above-mentioned raw materials that have been weighed evenly by a mixer, place them in a high-temperature muffle furnace, control the temperature at 800 ° C ~ 1400 ° C, and keep warm for 1 hour; The final glass melt is poured into deioni...

Embodiment 3

[0045] A preparation method for a solar cell front silver paste, comprising the following steps:

[0046] (1) prepare organic vehicle: get mass percentage and be 7% ethyl cellulose resin, mass percentage is 5% rosin resin, mass percentage is 15% acrylic resin, add mass percentage and be 73% organic solvent (propylene glycol methyl ether acetate , Ethylene glycol monobutyl ether acetate, butyl carbitol, petroleum ether or one or more mixtures), dissolve at a temperature of 80-150°C while heating and stirring, and after 2 hours, a uniform transparent organic carrier;

[0047] (2) prepare glass powder: get each raw material of following percentage by weight: 78.5% TeO 2 , 6% Bi 2 o 3 , 3% Li 2 O, 4.8% PbO, 2.8% SiO 2 , 2.5% ZnO, 2.4% Al 2 o 3 , mix the above-mentioned raw materials that have been weighed evenly by a mixer, put them in a high-temperature muffle furnace, control the temperature at 800°C to 1400°C, and keep them warm for 1 hour; pour the melted glass melt int...

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Abstract

The invention discloses tellurate glass powder for preparing front surface silver paste for a solar cell. The tellurate glass powder comprises the ingredients in percentage by mass: 55-97.9% of TeO<2>, 1-20% of Bi<2>O<3>, 1-20% of Li<2>O, 0.1-5% of PbO, 0-10% of ZnO, 0-5% of Al<2>O<3> and 0-10% of SiO<2>. In addition, the invention discloses the front surface silver paste for the solar cell and a preparation method for the front surface silver paste. The effect of environmental protection is ensured; and in addition, the efficiency of the front surface silver paste for the solar cell can reach or even can exceed that of the commercial paste.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a glass powder, a front silver paste of a solar cell prepared by using the same, and a preparation method thereof. Background technique [0002] With the shortage of fossil energy and people's concern about carbon dioxide emissions, solar power generation technology has been developed by leaps and bounds. As the main body of solar power generation technology, crystalline silicon solar cell technology has always attracted people's attention, and its photoelectric conversion efficiency has been continuously improved. [0003] The quality of solar cells depends on the carrier concentration, distribution and mobility in the crystalline silicon material used, and is also affected by the performance of the positive and negative electrodes of the battery. The front electrode directly affects the series resistance, shunt resistance, fill factor and photoelectric conversion efficienc...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01L31/0224C03C12/00H01B13/00
CPCC03C12/00H01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 杨建平张俊刚秦贤松李宝军颜灵光卢会刚
Owner SHANGHAI TRANSCOM ELECTRONICS TECH
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