Solar cell

A solar cell, comprising:

• a crystalline silicon substrate having a light-facing surface and a back-light surface that is opposite to the light-facing surface;
• a plurality of P-type semiconductor material layers;
• a plurality of N-type semiconductor material layers, wherein the N-type semiconductor material layers and the P-type semiconductor material layers are arranged alternately on the back-light surface of the crystalline silicon substrate;
• a plurality of first anode electric collection portions arranged on the back-light surface of the crystalline silicon substrate and electrically contacting at least one of the P-type semiconductor material layers respectively;
• at least one first electrode bus portion located on the back-light surface of the crystalline silicon substrate and electrically connected to the first anode electric collection portions;
• a plurality of first cathode electric collection portions, wherein the first cathode electric collection portions and the first anode electric collection portions are arranged alternately on the back-light surface of the crystalline silicon substrate and electrically contacting at least one of the N-type semiconductor material layers respectively;
• a plurality of second anode electric collection portions arranged on the back-light surface of the crystalline silicon substrate and electrically contacting at least one of the P-type semiconductor material layers respectively;
• at least one second electrode bus portion located on the back-light surface of the crystalline silicon substrate and electrically contacting the first cathode electric collection portions and the second anode electric collection portions;
• a plurality of second cathode electric collection portions, wherein the second cathode electric collection portions and the second anode electric collection portions are arranged alternately on the back-light surface of the crystalline silicon substrate and electrically connected to at least one of the N-type semiconductor material layers respectively;
• and
• at least one third electrode bus portion located on the back-light surface of the crystalline silicon substrate and electrically connected to the second cathode electric collection portions.