IBC battery structure

The utility model provides a IBC battery structure, it includes that the upper surface subtracts the layer of turning over, goes up surface passivation layer, upper surface n+ diffuse layer, base member, PN junction diffuse layer, back passivation layer and positive electrode and negative electrode, the base member is the black silicon substrate of N type, the black silicon substrate lower surface of N type is located to the PN junction diffuse layer, and the n+ diffusion region and the p+ diffusion that include into the parallel staggered arrangement of pectination are regional, back passivation layer lies in the regional and regional lower surface of p+ diffusion of n+ diffusion, and back passivation layer is the siNx membrane, parallel crisscross the distribution in the lower surface of back passivation layer of positive electrode and negative electrode one -tenth pectination, the positive electrode spreads the region with p+ and is connected, and the negative electrode spreads the region with n+ and is co