A kind of processing technology of substrate for solar cell

Abstract

An embodiment of the invention provides solar cell substrate treatment technology comprising the steps of providing a solar cell substrate; subjecting the substrate to texturing treatment; subjecting the substrate to ion diffusion treatment; removing phosphorosilicate glass at the edge of the substrate; forming an antireflective layer on the front face of the substrate; subjecting the back face of the substrate to polishing treatment by using a polishing solution before removing the phosphorosilicate glass at the edge of the substrate. According to the solar cell substrate treatment technology provided by the embodiment of the invention, the back face of the solar cell substrate is enabled to be flat by subjecting the back face of the substrate to polishing treatment through utilization of the polishing solution before removing the phosphorosilicate glass at the edge of the substrate, and therefore the back face of the solar cell substrate can be good in ohmic contact, the solar cell can be further improved in working voltage, and furthermore the solar cell can be improved in photoelectric conversion efficiency.

Description

Technical field [0001] The invention relates to the technical field of solar cell manufacturing, in particular to a process for processing a substrate for solar cells. Background technique [0002] In recent years, with the continuous advocacy and popularization of clean energy, solar cells have developed rapidly and are increasingly applied to many fields. However, the improvement of light utilization rate in solar cells has always been the key to restricting the development of solar cells factor. [0003] At present, conventional solar cell manufacturing processes include acid or alkali etching to form texture, ion diffusion, edge boro-phospho-silicate-glass (PSG) etching, formation of anti-reflection layer, screen printing and sintering , Sub-testing and other steps. Among them, the acid or alkali etching to form a textured surface is to make the light-receiving surface of the solar cell form a rough surface to reduce the probability of the light entering the solar cell being ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a treatment process that can improve the ohmic contact on the back of the solar cell substrate, so as to solve the problem that the photoelectric conversion efficiency of the solar cell cannot be further improved due to the poor ohmic contact on the back of the solar cell substrate in the prior art. Raised defects

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