Method and system for preparing solar cell used for PERC imbrication component

Abstract

The invention relates to a method for preparing a solar cell used for a PERC (Passivated Emitter and Rear Cell) imbrication component. The method comprises the following steps of: a step of providingof a silicon wafer: providing a silicon wafer as a raw material for preparing a solar cell; a step of diffusion junction making: forming an interface of an N-type semiconductor and a P-type semiconductor on a silicon wafer, namely a PN junction; a step of back passivation: applying a layer of back passivation film on the back of the silicon wafer; a step of plating of a back protective film: depositing a protective film on the back passivation film by adopting a PECVD (Plasma Enhanced Chemical Vapor Deposition) method; a step of laser grooving: grooving the back passivation film and the back protective film through laser ablation to expose the silicon wafer; a step of silk-screen printing, wherein the front surface of the silicon wafer is subjected to silk-screen printing by using noble metal slurry to obtain a main grid line and a secondary grid line, and the aluminum slurry is only used to perform silk-screen printing on the back of the silicon wafer, so that aluminum back surface field coverage of the solar cell is achieved; and a step of rapid sintering, wherein ohmic contact is formed, and the photogenerated carriers can be collected and conducted to the outside. The inventionalso relates to a solar cell for a PERC imbrication component.

Description

technical field [0001] The invention mainly relates to the field of application of solar cell shingled components, in particular to a method for preparing solar cells used in PERC shingled components. The invention also relates to a method of making a PERC shingled module. Furthermore, the present invention relates to a solar battery sheet for a PERC shingled assembly and a PERC shingled assembly. In addition, the present invention relates to a system for preparing solar cells for use in PERC shingled modules. Background technique [0002] With the accelerated consumption of conventional fossil energy such as coal, oil, and natural gas around the world, and the deteriorating ecological environment, especially the increasingly severe global climate change caused by greenhouse gas emissions, the sustainable development of human society has been seriously threatened. Countries around the world have formulated their own energy development strategies to deal with the limitation...

AI Technical Summary

Problems solved by technology

Among them, more than tens of billions of photovoltaic cells have been produced. For this reason, a large amount of precious metal paste is consumed, which directly leads to an increase in production costs, which is not conducive to the decline in the cost of electricity (LCOE) of the entire industry.

At the same time, precious metal silver powder needs to be refined by physical and chemical methods. The production process needs to consume a lot of energy and pollute the environment. Long-term exposure to heavy metals is not conducive to human health.

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