Conductive paste suitable for high-speed printing

Abstract

The invention discloses conductive paste suitable for high-speed printing. The conductive paste is formed by the following components in parts by weight: 75-92 parts of silver powder, 5-12 parts of organic solvents, 2-3 parts of organic carriers, 0.8-5.3 parts of glass bead powder and 0.1-2 parts of thixotropic agents, wherein the particle size D50 of the glass bead powder is 1-2 microns; the glass bead powder is formed by the following components of tellurium dioxide, bismuth oxide, zinc oxide, tungsten oxide, lithium oxide, molybdenum oxide, aluminum oxide, boric acid and silicon oxide; andthe glass bead powder is put into a mixed solution formed by terpilenol, butyl carbitol acetate, oleic acid and polyvinylpyrrolidone, and a spherical glass bead with an organic coating layer is obtained after thermal insulation. According to the conductive paste, the lubricity of a paste system is improved, the ink permeability is increased, a problem of material shortage in the fine grid lines isavoided, the molten glass is difficult to flow when the paste is sintered, the fine line shape is kept, the conductive paste is suitable for fine line printing of a narrow-opening screen plate, a material shortage situation cannot exist, the line width is narrow, and a height-width ratio is large.

Description

Technical field [0001] The invention relates to a conductive paste suitable for high-speed printing, belonging to the technical field of solar cell functional materials. Background technique [0002] As an important branch of new clean energy, photovoltaic cells have achieved rapid development in recent years. Photovoltaic cell technology is also changing with each passing day. The entire industry chain is actively using technological innovation to improve photovoltaic cell conversion efficiency and reduce costs, and strive to achieve parity on the Internet to replace traditional high pollution. energy. [0003] Crystalline silicon photovoltaic cells are currently the main type of photovoltaic cells, accounting for more than 90%. The photoelectric conversion principle is: boron-doped P-type silicon and phosphorus-doped N-type silicon form a PN junction. When sunlight is irradiated, PN The junction will absorb the energy of the photon to excite the electron transition, forming an e...

AI Technical Summary

Problems solved by technology

If the screen opening is narrow, the ink permeability of the paste printing is poor, and it is easy to cause a local shortage of material in the fine grid after printing, thereby increasing the series resistance of the battery and affecting the photoelectric conversion efficiency of the solar cell.

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