METAL WRAP THROUGH BACK CONTACT SOLAR CELL AND MANUFACTURING METHOD THEREOF AND MODULE THEREOF

摘要

A metal wrap through back-contact solar cell, a manufacturing method thereof and a module thereof are provided. The solar cell includes: a first conductive type region and a second conductive type region in a cell substrate (110) and a sub gate (130) formed on the front of the cell substrate (110), and holes (140) penetrating through the cell substrate (110), a main electrode (150) on the back of the cell substrate (110), a second electrode (160) located on the back of the cell substrate (110) and gate isolate trenches (171,176); the second electrode (160) is also used for self-aligned compensation doping in the second conductive type region, which contacts with the second electrode (160); the current flow created by the first conduction type area is outputted to the second electrode (160) by the second conduction type area, which is self-aligned compensation doped. In the manufacturing method, the sub gate (130) is patterned on the front cell substrate (110); the main gate electrode (150) and the second electrode (160) are formed on the back of the cell substrate (110); the second electrode (160) is used for self-aligned compensation doping in the second conductive type region contacted with the second electrode (160). The process of back contact solar cell is simple and the cost is low.