BIFACIAL SOLAR CELLS WITH OVERLAID BACK GRID SURFACE

摘要

A simplified manufacturing process and the resultant bifacial solar cell (BSC) are provided, the simplified manufacturing process reducing manufacturing costs. The BSC includes an active region (103) located on the front surface of the substrate (101), formed for example by a phosphorous diffusion step. After removing the PSG, assuming phosphorous diffusion, and isolating the front junction, dielectric layers (105/107) are deposited on the front and back surfaces. Contact grids (109/111) are formed, for example by screen printing. Prior to depositing the back surface dielectric, a metal grid may be applied to the back surface, the back surface contact grid registered to, and alloyed to, the metal grid during contact firing.