Inkjet‐Printed Cu2ZnSn(S, Se)4 Solar Cells

Cu2ZnSn(S, Se)4-based solar cells with total area (0.5 cm2) power conversion efficiency of 6.4% are demonstrated from thin film absorbers processed by inkjet printing technology of Cu-Zn-Sn-S precursor ink followed by selenization. The device performance is limited by the low fill factor, which is due to the high series resistance.