Solar cell, production method and photovoltaic module

Abstract

The invention provides a solar cell, a production method and a photovoltaic module, and relates to the technical field of solar photovoltaics. The solar cell comprises a silicon substrate, a first titanium oxide layer, a second titanium oxide layer, a first electrode and a second electrode, wherein the first titanium oxide layer has electron selectivity, and the second titanium oxide layer has hole selectivity; the first electrode is located on the first titanium oxide layer; the second electrode is positioned on the second titanium dioxide layer; the first titanium oxide layer and the secondtitanium oxide layer are respectively positioned on a light-facing surface and a backlight surface of the silicon substrate; or the first titanium oxide layer and the second titanium oxide layer are respectively positioned in a first region and a second region of the backlight surface of the silicon substrate. The production process of the first titanium oxide layer and the second titanium oxide layer is less than or equal to 600 DEG C, the temperature is low, impurities are reduced, the service life of minority carriers is long, the cell structure is simplified, and the process is simplified.The first titanium oxide layer and the second titanium oxide layer can avoid direct contact between the silicon substrate and the electrodes, and the recombination rate is greatly reduced.

Description

technical field [0001] The invention relates to the field of solar photovoltaic technology, in particular to a solar cell, a production method, and a photovoltaic module. Background technique [0002] A solar cell usually has an emitter and a field structure, and two kinds of electrodes are respectively arranged on the emitter and the field structure. In the case of light irradiation, the solar cell absorbs light energy to generate electron-hole pairs, and through the separation of the p-n junction, the carriers are separated, and then collected by the positive and negative electrodes, thereby outputting electrical energy. [0003] At present, in the production process of solar cells, silicon substrates usually need to be doped at a higher concentration to obtain emitter and field structures. The doping process temperature is greater than or equal to 800°C. More impurities will be introduced into the solar cell, which will affect the lifetime of the minority carriers, resul...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a solar cell, a production method, and a photovoltaic module, aiming to solve the problems of complex process and low efficiency caused by high temperature of solar cell preparation

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