Photovoltaic cell, method for manufacturing same, and photovoltaic module

A photovoltaic module, comprising at least one photovoltaic cell string, wherein each of the at least one photovoltaic cell string includes a plurality of photovoltaic cells electrically connected;

• wherein each of the plurality of photovoltaic cells comprises:
• a silicon substrate;
• a first passivation layer disposed on a front surface of the silicon substrate;
• and
• a second passivation layer, a polarization phenomenon weakening (PPW) layer and at least one silicon nitride layer SiuNv that are sequentially disposed on a rear surface of the silicon substrate in a direction away from the silicon substrate, wherein 1<u/v<4;
• wherein the second passivation layer includes at least one aluminum oxide layer AlxOy, wherein 0.8<y/x<1.6, and a thickness of the at least one aluminum oxide layer is in a range of 4 nm to 20 nm;
• wherein the PPW layer includes at least one silicon oxynitride layer SirOsNt, wherein r>s>t, and a thickness of the at least one silicon oxynitride layer is in a range of 1 nm to 30 nm;
• wherein a thickness of the at least one silicon nitride layer is in a range of 50 nm to 100 nm;
• and
• wherein a concentration of silicon atoms in the at least one silicon oxynitride layer is between 5×1021/cm3 and 2.5×1022/cm3.