SIMULATION OF INFLUENCE OF BUFFER LAYER PARAMETERS ON PHOTOELECTRIC CELL PROPERTIES

Abstract

The article theoretically demonstrates high-performance solar cells based on cadmium telluride (CdTe) with double heterojunction (DHSC) with the addition of a separate back contact layer (BSF) of cadmium selenide (CdSe) and antimony selenide (Sb₂Se₃), using software SCAPS 3.3.09. The influence of initial parameters on the photoelectric characteristics of the designed heterostructure is investigated in detail. It is established that the energy conversion efficiency (PCE) of the CdTe solar battery is significantly increased due to the use of BSF CdSe and Sb₂Se₃ layers. The efficiency of the solar cell CdTe increases from 14.57%, for pure SC, to 24.13% at V_oc=1.03 V, J_sc=28.26 mA/cm² and FF=82.97%, due to the use of the BSF CdSe layer. On the other hand, the efficiency of the solar cell CdTe increases to 25.16% at V_oc=1.06 V, J_sc=28.25 mA/cm² and FF=83.26%, respectively, when using the BSF layer Sb₂Se₃. These results show that both CdSe and Sb₂Se₃ are promising BSFs for the fabrication of cost-effective solar cells with a double heterojunction based on CdTe.