A post-processing method for solar cells

Abstract

The invention relates to a post-processing method of a solar cell piece. The post-processing method adopts a non-stick coating to greatly improve the anti-subfissure capability of the solar cell piece and a subsequent solar assembly; the low-temperature sintering process can be used for drying the non-stick coating and further effectively repairing the microdefect in the cell piece; meanwhile, the uniformity and the compactness of the silicon nitride thin film can be effectively improved; the passivation effect of the silicon nitride thin film can be improved, so that the service life of a minority carrier of the cell piece can be prolonged; in addition, the PID resistance of the high-temperature annealed cell piece can be improved. Therefore, the post-processing method is significant in production practical value, and can improve the competitiveness for an enterprise.

Description

technical field

[0001] The invention relates to the technical field of solar cell production, in particular to a post-processing method for solar cell sheets. Background technique

[0002] With the continuous development of the crystalline silicon solar energy market, more and more quality problems have been exposed, and the industry's understanding of the quality of photovoltaic cell modules has become more and more in-depth. At present, more attention is being paid to micro-cracks in photovoltaic modules, that is, cracks appear in solar cells packaged in photovoltaic modules. Due to the existence of the package and the viscosity of EVA, the fragments of the split battery parts still maintain the original combination and conduction. There is not much change in the appearance and output power in a short time, which can only be measured with an electroluminescence tester (EL). However, in the long run, there is a hidden danger that the thermal expansion and contraction betw...

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