Table 1

IV parameters of the best POLO IBC solar cells at ISFH with M2 p-type wafer size. The 23.9% efficient cell is our previously best cell published in [9]. The 24.1% cell and the 24.5% cell were independently confirmed by ISFH CalTeC. The efficiency improvement measures are described in the text. The series resistance R_s is calculated from the measured IV curve and the measured J_scV_oc curve.