N type solar cell and subassembly and system thereof

The utility model relates to a N type solar cell and subassembly and system thereof. The utility model discloses a N type solar cell, including N type crystalline silica base member, the main schedule bread of N type crystalline silica base member is drawn together in proper order from inside to outside p+ and is mixed regional and positive surface passivation and subtract anti - membrane, the back of the body surface of N type crystalline silica base member is including the back electrode, and the trough - shaped structure that piercing through the passivation and subtracting anti - membrane, openly vice bars and front main grid are drawn together to the main schedule bread of N type crystalline silica base member, openly vice bars fill in trough - shaped structure and with the regional ohmic contact that forms of p+ doping. The beneficial effects are that: in the positive electrode structure on the positive surface of N type solar cell, the main grid line uses the silver thick liquid, can satisfy the weldin