An optimization on CZTSSe solar cell using different back contact materials

Kesterite structure Cu2ZnSn(S,Se)4 (CZTSSe) thin films with a tunable bandgap are able to enhance solar cells performance when using as an absorber layer. In this work, we have simulated a basic CZTSSe solar cell structure with SCAPS program. This basic solar cell reached to about 11.34% power conversion efficiency (PCE). Then, using different back contact materials we tried to optimize it’s output characteristics. It is found that, an element with work function around 5.4 eV will be the best choice as a back contact metal for the CZTSSe solar cell. Finally, it is proved that using such element causes a 13.28% PCE.

کلیدواژه ها:

thin film ، kesterite solar cell ، CZTSSe ، back contact material ، PCE