N type silicon substrate back contact solar battery

The utility model relates to an N type silicon substrate back contact solar battery. An N type silicon substrate illuminated face is provided with a laminated structure of more than one antireflection layer; an N type silicon substrate shady face is an N type layer part and a P type layer part alternatively arranged, wherein the N type layer part successively comprises an N type silicon substrate, an antireflection layer, and an electrode penetrating the antireflection layer and contacting with the N type silicon substrate, and the P type layer part successively comprises the N type silicon substrate, a P type crystalline silicon layer, an antireflection layer, and an electrode penetrating the antireflection layer and connecting with the P type crystalline silicon layer. The N type silicon substrate back side contact solar battery is compatible with a traditional crystalline silicon production line, and can realize production of back contact solar batteries through upgrading and reconstruction; compared with a traditional crystalline silicon solar battery, the N type silicon substrate back side contact solar battery can solve the problem of front side electrode shading of a general solar battery, reduce usage amount of metal electrodes and raise efficiency of a solar battery; compared with a traditional HIT battery and an IBC solar battery, the N type silicon substrate back side contact solar battery has the characteristics of simple preparation processes and low equipment cost.