Electrical simulation of the function of tungsten oxide in polymeric solar cells

In this research, polymeric solar cells (PSCs) are numerically simulated using SCAPS and AMPS. The study deals with the effects of the thickness of active and buffer layers, defect densities of active layers, and temperature on open-circuit voltage (V-OC), fill factor (FF), short-circuit current density (J(SC)), and performance (PCE). Also, J-V characteristics and quantum efficiency are plotted in two types of buffer layers (i.e. PEDOT:PSS and WO3). The results show an optimal value for the absorber and the buffer layer thickness. Also, an increase in the defect densities of the absorber layer is found to cause a decrease in the efficiency of the PSCs. According to the findings, it is possible to use WO3 for the higher conversion efficiency of buffer layers.