[20p-133-1~14] 16.3 Bulk, thin-film and other silicon-based solar cells

[20p-133-1] Evaluation and analysis of spatial distribution of IQE of PERC

〇Toshimitsu Mochizuki¹, Supawan Joonwichien¹, Katsuto Tanahashi¹, Katsuhiko Shirasawa¹, Isao Sakata¹, Hidetaka Takato¹ (1.AIST)

Keywords:Crystalline Silicon solar cells, Solar Cells, PERC Cells

Internal quantum efficiency of a conventional monocrystalline silicon Al-BSF and a PERC were mapped with excitation spots with diameter of 0.2 mm measuring total reflection using an integration sphere which nearly totally cover the samples. IQE of PERC lowered by 3 % on the local Al-BSF on the rear surface and analyzed that the local Al-BSF region approximately contributed to 3 mV lowering of open-circuit voltage of the PERC.