Crystalline silicon solar cell electrode paste and preparation method thereof
An electrode slurry, solar cell technology, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve problems such as increasing production costs, achieve production cost savings, low resistivity, The effect of improving electrical performance
Inactive Publication Date: 2012-07-11
武涛 +2
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Problems solved by technology
Silver is a precious metal, if the silver content is high, it will increase the production cost
Method used
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Embodiment Construction
[0018] Embodiment (experiment) 1
[0019] 1) Preparation of metal silicide: Put metal nickel powder and silicon powder in a resistance furnace and keep warm at 750°C for 2 hours, anneal, and prepare metal silicide powder with a particle size of 3 μm through ball milling, and take metal silicide 1g for use;
[0020] 2) Preparation of organic vehicle: In a reactor heated by heat conduction oil, the temperature is controlled at 90°C, take 30g of isopropanol, 6g of ethyl cellulose and 0.5g of modified castor oil derivatives and stir in the reactor at constant temperature until complete Dissolving, the time is 3h, after the reactant is cooled, it is filtered through a screen to obtain 36.5g of the organic carrier required for preparing the electrode slurry;
[0021] 3) Preparation of electrode slurry: Take 56g of metallic silver powder, the silver powder ratio is 7:2:1 for the mixed mass ratio of amorphous silver powder, flake silver powder and spherical silver powder, take 36.5g ...
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Abstract
The invention relates to crystalline silicon solar cell electrode paste which comprises the following raw materials in percentage by weight: 55 percent to 69.99 percent of metal silver powder; 1 percent to 6 percent of glass binder; 3 percent to 6 percent of organic resin; 20 percent to 30 percent of organic solvent; 0.1 percent to 0.5 percent of rheological agent and 0.1 percent to 5 percent of metal silicide. A preparation method comprises the following steps: 1, preparing the metal silicide; 2, preparing an organic carrier; and 3, preparing the electrode paste. The crystalline silicon solar cell electrode paste and the preparation method have the benefits that in different raw material proportions and at different temperatures, different metal silicides can be formed; by adding the metal silicide powder formed by specific components at a specific temperature, the ohmic contact of a metal electrode and silicon is strengthened and the crystalline silicon solar cell electrode paste has low resistivity; under the condition of not influencing the electrical property of a cell, the silver content can be reduced and the production cost can be saved; the leadless glass binder is selected, the pollution to the environment can be avoided, and the crystalline silicon solar cell electrode paste has strong binding power; and by the silver powder which is meticulously selected and matched, the electrical property is improved.
Description
technical field [0001] The invention relates to a crystalline silicon solar cell electrode slurry and a preparation method thereof. Background technique [0002] Solar energy is an inexhaustible clean energy for human beings. With the depletion of non-renewable energy sources such as coal and oil on the earth, human beings turn their energy demands to solar energy, and solar cells are one of the applications. When sunlight hits a solar cell, the solar cell uses the electronic properties of semiconductor materials to convert light energy directly into electrical energy. In silicon solar cell technology, electrode fabrication is a very important link. Since the development of screen printing technology in the 1970s, its technology has been very mature, and it is also the mainstream technology for large-scale solar cell production. [0003] The performance of the electrode silver paste directly affects the performance of the battery and is a key material in the battery manufa...
Claims
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IPC IPC(8): H01B1/22H01B13/00H01L31/0224
Inventor 武涛王龙刘科李光伟
Owner 武涛