Recessed Back-Surface-Field Crystalline Silicon Solar Cells with Heterojunction for Bifacial Application

To achieve high efficiency in bifacial application, recessed back-surface-field (BSF) are designed on the crystalline silicon (c-Si) wafer with high quality hydrogenated amorphous silicon layer to improve the short-circuit current (J
_sc
) and reduce the carrier recombination. We perform simulation analysis by utilizing Silvaco TCAD Altas. At an albedo intensity of 30%, our recessed BSF (RBSF) silicon heterojunction (SJT) solar cell reaches a 47.07 mA/cm
²
short-circuit current (J
_sc
) and 30.16 % of conversion efficiency (η) which is 9.24 % and 9.2 % more than the J
_sc
and η of flat SJT solar cell thank to the additional recessed BSF area. When the albedo intensity reaches 100 %, the increase percentages of J
_sc
and η arrive 12.66 % and 13.1 %, respectively.