Modeling Efficiency Loss in Sb2Se3 Solar Cells

SCAPS simulation is conducted to model effect of defects on performance of Sb
₂
Se
₃
solar cells. Doping concentration slightly impacts short current density and fill factor, however it strongly increases Voc. Donor type traps in Sb
₂
Se
₃
significantly reduce Voc and fill factor and fill factor reduction is more obvious than Voc reduction. Acceptor traps in Sb
₂
Se
₃
slightly influence Voc, but fill factor and photocurrent can be obviously affected. It is acceptor type interface traps that affect photovoltaics parameters. Predicated CdS-Sb
₂
Se
₃
solar cell has efficiency of 25.7%. Predicted Sb
₂
Se
₃
solar cells with decreasing lattice mismatch and band offset demonstrate efficiency of 30.3%.