Solar cell and photovoltaic module

Abstract

The embodiment of the invention relates to the photovoltaic field, in particular to a solar cell and a photovoltaic module, which comprise a substrate, a tunneling layer, a field passivation layer, a first passivation film and a first electrode penetrating through the first passivation film to be in contact with the field passivation layer, and the tunneling layer, the field passivation layer and the first passivation film are sequentially arranged on the back surface of the substrate; the doping concentration of the first doping element in the tunneling layer is smaller than the doping concentration of the first doping element in the field passivation layer, and the doping concentration of the first doping element in the tunneling layer is larger than the doping concentration of the first doping element in the substrate; the field passivation layer comprises a first doped region and a second doped region, and the doping curve slope of the first doped region is larger than that of the second doped region. According to the embodiment of the invention, the doping concentration of the first doping element in the field passivation layer is higher than that in the tunneling layer and the substrate, and the first doping element achieves a high activation rate in the surface layer of the field passivation layer, thereby facilitating the improvement of the passivation effect of the solar cell, and improving the conversion efficiency of the solar cell.

Description

technical field [0001] The embodiments of the present application relate to the field of photovoltaics, and in particular, to a solar cell and a photovoltaic assembly. Background technique [0002] Conventional fossil fuels for photovoltaic modules are increasingly being consumed. Among all sustainable energy sources, solar energy is undoubtedly one of the cleanest, most common and most potential alternative energy sources. At present, among all solar cells, crystalline silicon solar cells are one of the solar cells that have been widely commercialized. This is due to the extremely abundant reserves of silicon materials in the earth's crust, and crystalline silicon solar cells are compared with other types of solar cells. Cells have excellent electrical and mechanical properties, therefore, crystalline silicon solar cells occupy an important position in the field of photovoltaics. [0003] With the continuous development of solar cell technology, the recombination loss in t...

AI Technical Summary

Problems solved by technology

However, the conversion efficiency of existing

Images