Method for preparing solar cell

Abstract

A method for preparing a solar cell is provided. The method includes providing a N-type silicon substrate; depositing a tunnel passivation structure on the first surface of the N-type silicon substrate, and then depositing a mask layer on the tunnel passivation structure; cleaning the second surface of the N-type silicon substrate; performing boron diffusion treatment on the cleaned second surface of the N-type silicon substrate and annealing treatment on the tunnel passivation structure in the same environment, so that a first emitter layer is formed on the second surface of the N-type silicon substrate and the tunnel passivation structure is crystallized; performing laser patterning treatment on the first emitter layer to form a second emitter region; depositing a passivation and anti-reflection film; and forming a first electrode and a second electrode.