A Generalized Theory Explains the Anomalous Suns– $V_{{\rm{oc}}}$ Response of Si Heterojunction Solar Cells

Suns-Voc measurements exclude parasitic series resistance effects and are, therefore, frequently used to study the intrinsic potential of a given photovoltaic technology. However, when applied to a-Si/c-Si heterojunction (SHJ) solar cells, the Suns-Voc curves often feature a peculiar turnaround at high illumination intensities. Generally, this turn-around is attributed to extrinsic Schottky contac...