[14a-A403-1~9] 16.3 Bulk, thin-film and other silicon-based solar cells

[14a-A403-6] Effect of surface structure of photovoltaic cell on electric field

〇Yasushi Tachibana¹, Takeshi Toyoda¹, Sachiko Jonai², Yukiko Hara³, Hajime Shibata³, Atsushi Masuda³ (1.IRII, 2.Niigata Univ., 3.AIST)

Keywords:Potential induced degradation, Electric field strength, Pyramid structure

It is considered that the strong electric field inside the SiN_x layer on the surface of photovoltaic cell is a factor promoting potential induced degradation (PID). Therefore, the electric field strength inside the SiN_x layer was analyzed in three dimensions for the cell surfaces with the pyramid and flat structures. The analysis results showed that the electric field was 5.6 times larger in the convex portion of the pyramid structure than that for the flat structure. These findings suggest that PID occurs possibly depending on the cell surface structure.