Solar cell and photovoltaic module

A photovoltaic module, comprising:

• a solar cell string formed by connecting a plurality of solar cells;
• a front packaging layer configured to cover a front surface of the solar cell string;
• a back packaging layer configured to cover a back surface of the solar cell string;
• a front cover plate configured to cover a surface of the front packaging layer away from the solar cell string;
• and
• a back cover plate configured to cover a surface of the back packaging layer away from the solar cell string,
• wherein at least one of the plurality of solar cells includes:
• a substrate including a first surface;
• a tunneling oxide layer covering the first surface;
• a doped conductive layer covering a surface of the tunneling oxide layer away from the substrate;
• an intrinsic polycrystalline silicon layer formed on one side of the doped conductive layer away from the tunneling oxide layer;
• a first passivation layer;
• and
• a plurality of first electrodes arranged on one side of the intrinsic polycrystalline silicon layer away from the doped conductive layer and electrically connected to the doped conductive layer,
• wherein at least a portion of each first electrode is located in the intrinsic polycrystalline silicon layer, and a gap is defined between a top end of each first electrode and the substrate and
• wherein the intrinsic polycrystalline silicon layer includes a plurality of covering portions spaced apart from one another, and each covering portion is between the doped conductive layer and a respective one of the plurality of first electrodes, and wherein the first passivation layer includes a first part covering the plurality of covering portions and a second part in direct contact with the doped conductive layer.