Conductive silver paste used for photovoltaic cells
A technology of conductive silver paste and photovoltaic cells, applied in photovoltaic power generation, circuits, conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems such as adverse effects, and achieve improved wettability, difficult flow, and high surface tension Effect
Inactive Publication Date: 2018-10-16
SUZHOU ISILVER MATERIALS
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Problems solved by technology
In addition, in previous studies, it was proposed to avoid glass crystallization, and it was believed that crystallization would cause adverse effects
Method used
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Embodiment 1~4
[0033] Embodiment 1~4: a kind of conductive silver paste for photovoltaic cell, described conductive paste is made up of the component of following parts by weight:
[0034] Table 1
[0035]
[0036] The above-mentioned organic carrier is formed by mixing butyl carbitol acetate, ethyl cellulose, acrylate, oleic acid, polypropylene glycol, and polyamide wax in a weight ratio of 75:7:6:4:3:5.
[0037] The above-mentioned organic carrier is formed by heating, stirring and mixing at a temperature of 90 degrees.
[0038] Note: embodiment 1 organic solvent is at least one in terpineol, butyl carbitol, propylene glycol phenyl ether, propylene glycol methyl ether, dimethyl glutarate, dimethyl succinate; embodiment 2 organic solvent It is a mixed solvent formed by butyl carbitol and propylene glycol phenyl ether; the organic solvent of embodiment 3 is propylene glycol phenyl ether; the organic solvent of embodiment 4 is a mixed solvent formed by terpineol and dimethyl glutarate.
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Abstract
The invention discloses conductive silver paste used for photovoltaic cells. The conductive paste consists of the following components, by weight: silver powder, an organic solvent, an organic carrier, alkyl phenol polyoxyethylene ether, and metal microcrystalline glass powder. The particle size D50 of the metal microcrystalline glass powder is 0.3-2 mu m. The metal microcrystalline glass powder consists of the following components: 10-50 parts of tellurium dioxide, 15-70 parts of bismuth oxide, 2-10 parts of zinc oxide, 1-15 parts of tungsten oxide, 5-20 parts of lithium oxide, 1-3 parts of tungsten dioxide, 0.6-2 parts of molybdenum dioxide, 1-1.5 parts of stannous oxide, 0.4-1 part of indium chloride, and barium chloride. The silver powder is of a spherical shape, a polyhedral shape, ashort rod shape, a branch shape, or a tablet shape. The conductive paste has better performance than conventional amorphous glass, effectively improves the conversion efficiency of cells, and has thecharacteristics of high temperature viscosity and large surface tension. Molten glass cannot not flow easily during a paste sintering process, thereby maintaining a fine line shape.
Description
technical field [0001] The invention relates to a conductive silver paste for photovoltaic cells, belonging to the technical field of solar cell functional materials. Background technique [0002] Photovoltaic cells, as an important branch of new clean energy, have achieved rapid development in recent years. Photovoltaic cell technology is also changing with each passing day. The entire industry chain is actively improving the conversion efficiency of photovoltaic cells and reducing costs through technological innovation, striving to achieve grid parity and replace traditional high pollution. energy. [0003] Crystalline silicon photovoltaic cells are currently the most important type of photovoltaic cells, accounting for more than 90%. The principle of photoelectric conversion is: boron-doped P-type silicon and phosphorus-doped N-type silicon form a PN junction. The junction then absorbs photon energy to excite electron transitions, forming electron-hole pairs, thereby gen...
Claims
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IPC IPC(8): H01B1/22H01L31/0224
CPCH01B1/22H01L31/022425Y02E10/50
Inventor 周欣山汪山包娜
Owner SUZHOU ISILVER MATERIALS