Preparation method of metallization wrap-through silicon solar cell electrode

Abstract

The invention discloses a preparation method of a metallization wrap-through silicon solar cell electrode, and relates to the technical field of silicon solar cell processes. The objective of the invention is to reduce the slurry leakage probability of a laser perforated area on the premise without influencing the printing effect of a positive pole point so as to improve the service life of a screen printing plate and improve the quality of the product. A traditional MWT back positive pole screen printing plate with the same film thickness is designed to have different film thicknesses in different regions, namely the film thicknesses of the positive pole region and the laser perforation region are designed to be different, the film thickness of the positive pole region is maintained to beunchanged, the film thickness of the laser perforation region is increased, and the purpose of reducing the slurry leakage probability of the laser perforation region is achieved under the conditionof ensuring that the positive pole printing effect is unchanged.

Description

technical field [0001] The invention relates to the technical field of silicon solar cell technology, in particular to a method for preparing metal perforated wound silicon solar cell electrodes. Background technique [0002] Currently, crystalline silicon solar technologies include heterojunction solar cells, back electrode contact silicon solar cells, emitter wrap-around silicon solar cells, laser grooved buried gate cells, oblique evaporated metal contact silicon solar cells and metal through-hole silicon solar cells Among them, metal perforated silicon solar cells have received more and more attention because of their high efficiency, small shading area and better appearance. [0003] The metal perforated silicon solar cell transfers the energy collected by the light-receiving surface through the cell to the electrode on the backlight side of the cell through laser drilling, so as to reduce the shading area of ​​the light-receiving surface and improve the conversion effi...

AI Technical Summary

Problems solved by technology

When the current step-by-step printing method is used to prepare metal perforated silicon solar cell electrodes, it is easy to cause slurry leakage in the laser hole area due to burr wear and tear on the screen when preparing the positive electrode, thus affecting the life of the screen, uptime and product quality.