Photovoltaic cell passivation structure, photovoltaic cell and preparation method thereof, and photovoltaic module

The embodiment of the invention relates to the technical field of solar cells, and provides a photovoltaic cell passivation structure, a photovoltaic cell and a preparation method thereof, and a photovoltaic module, the passivation structure is used for being arranged on the surface of a crystalline silicon substrate, and comprises a front passivation structure arranged on the front surface of the crystalline silicon substrate and a back passivation structure arranged on the back surface of the crystalline silicon substrate, the front passivation structure comprises a first tunneling oxide layer and a first doped polycrystalline silicon layer which are arranged from inside to outside; and the back passivation structure comprises a second tunneling oxide layer, a nitrogen-doped polycrystalline silicon layer and a phosphorus-doped polycrystalline silicon layer which are arranged from inside to outside. According to the invention, surface defects of the crystalline silicon substrate are passivated by using the f