Photovoltaic cell and preparation method thereof

Abstract

The embodiment of the invention provides a photovoltaic cell and a preparation method thereof. The preparation method of the photovoltaic cell comprises the steps of providing a cell substrate; forming a sacrificial electrode on the cell substrate, wherein a sacrificial material is arranged in the sacrificial electrode, and the sacrificial electrode is provided with a first top surface far away from the cell substrate; forming a passivation layer on the cell substrate, wherein the passivation layer covers at least part of the sacrificial electrode, the passivation layer is provided with a second top surface away from the cell substrate, and the second top surface is lower than the first top surface or the second top surface is flush with the first top surface; forming an initial electrodeon the first top surface of the sacrificial electrode, wherein the initial electrode is also located on part of the passivation layer; and sintering the sacrificial electrode and the initial electrodeto form a cell electrode, wherein the sintering temperature of the sintering treatment is greater than or equal to the boiling point of the sacrificial material. According to the embodiment of the invention, the conversion efficiency of the photovoltaic cell is improved, and the preparation cost of the photovoltaic cell is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of photovoltaics, and in particular to a photovoltaic cell and a preparation method thereof. Background technique [0002] With the continuous development of photovoltaic cell technology, the resistivity of the electrode itself of the photovoltaic cell and the size of the area where the electrode and the emitter form an ohmic contact have become important factors that restrict the further improvement of the conversion efficiency of the photovoltaic cell. In order to reduce the resistivity of electrodes in photovoltaic cells and increase the conversion rate of photovoltaic cells, silver paste is usually used to prepare electrodes. And in order to increase the area where the electrode and the emitter form ohmic contact, when preparing a high-efficiency photovoltaic cell, it is necessary to perform laser grooving on the passivation layer, and then form an electrode at the position corresponding to t...

AI Technical Summary

Problems solved by technology

And in order to increase the area where the electrode and the emitter form ohmic contact, when preparing a high-efficiency photovoltaic cell, it is necessary to perform laser grooving on the passivation layer, and then form electrodes at the corresponding positions of the grooves. The equipment cost required for laser grooving high

[0003] Therefore, the conversion efficiency of existing photovoltaic cells still needs to be improved, and the preparation cost needs to be reduced

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