Tailoring doping of efficient Sb2Se3 solar cells in substrate configuration by low temperature post deposition selenization process

A low temperature post deposition selenization process for Sb 2 Se 3 absorber is presented which allows to tailor the doping concentration, thus solar cell performance. Sb 2 Se 3 are grown onto Mo coated soda lime glass by e-beam evaporation and subsequently a post deposition selenization is performed which influences the selenium content of the absorber layer and therefore the formation of SeSb antisites acceptor defects which could be directly related to a change in doping density. By optimizing the selenization parameters, thus adjusting the absorber doping, solar cells in a glass/Mo/Sb 2 Se 3 /CdS/iZnO+ITO substrate configuration with up to 4.3% efficiency could be achieved.