Photovoltaic cell and preparation method thereof

Abstract

The invention discloses a photovoltaic cell and a preparation method thereof, and the preparation method of the photovoltaic cell comprises a diffusion junction preparation step, a laser scribing step, a grooving step, an impurity glass removal step, a front and back passivation step, an electrode forming step and a splitting step. When the fragmented battery is obtained, the edge junction region, corresponding to the pn junction, at the fragmentation position of the fragmented battery is covered by the first passivation layer and is not directly exposed to the external environment, so that the edge recombination of the fragmented battery can be effectively inhibited, and the FF, VOC, JSC and efficiency of the fragmented battery are further improved.

Description

technical field [0001] The present invention relates to the technical field of solar photovoltaic, in particular to a photovoltaic cell and a preparation method thereof. Background technique [0002] In order to achieve grid parity, photovoltaic modules urgently need to continuously increase output power and reduce costs, promote continuous innovation in module technology, and accelerate the industrial application of new technologies. In recent years, the more mature module products are mainly represented by half-cut modules and shingled modules. Both of these two technologies require the whole cell to be cut into pieces and then connected in series and parallel to realize the positive and negative poles. The current of the sheet cell is reduced, which can effectively reduce the heat loss inside the module. Specifically, the half-cut module is generally connected in series by cutting the whole battery in half, and the current of each segmented battery is reduced to 1 / 2 of t...

AI Technical Summary

Problems solved by technology

Although these methods have a certain effect on passivating the recombination of the edge base region, the recombination of the edge junction region is still too large, so the efficiency of the split cell and the power of the corresponding module have not been significantly improved.

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