P-TYPE PERC DOUBLE-SIDED SOLAR CELL, ASSEMBLY THEREOF, SYSTEM THEREOF AND PREPARATION METHOD THEREFOR

摘要

Disclosed is a P-type PERC double-sided solar cell, comprising back sliver electrodes, back aluminum gate lines, a back passivation layer, P-type silicon, an N-type emitter, a front silicon nitride film, and a front silver electrode in sequence. The back silver electrodes and the back aluminum gate lines intersect at a first preset angle, wherein 10° the first preset angle 90°; a first laser grooving area is formed by performing laser grooving on the back passivation layer; the first laser grooving area is provided below the back aluminum gate lines; the back aluminum gate lines are connected to the P-type silicon by means of the first laser grooving area; an aluminum gate frame is provided at the periphery of the back aluminum gate lines; the aluminum gate frame is connected to the back aluminum gate lines and the back sliver electrodes. According to the present invention, the solar cell is simple in structure, low in costs, easy to generalize, and high in photoelectric conversion efficiency.