Impact of PEDOT: PSS Electrode Work Function on DPPEZnP TBO Based Active Layer in Tandem Organic Solar Cells

This study investigates the impact of electrode work function on the performance and efficiency of DPPEZnP-TBO-based tandem organic solar cell (OSC) devices, focusing on PEDOT: PSS as the electrode material. By adjusting the electrode's work function, we investigate its influence on the active layer's electrical properties and the device's key performance metrics, including open-circuit voltage (VOC), short-circuit current density (JSC), power conversion efficiency (PCE), and fill factor (FF). Changes in electrode work function are associated with significant differences in fill factor (FF), power conversion efficiency (PCE), open-circuit voltage (VOC), and short-circuit current density (JSC). The best performance is of tandem organic solar cell is achieved at a work function of 5.2 eV, with a JSC of 2.598 mA/cm², VOC of 1.16 V, PCE of 2.41%, and FF of 79.6%. Optimising the work function improves charge mobility and reduces recombination losses, enhancing overall performance. This research provides valuable insights into improving DPPEZnP-TBO solar cells for durable and scalable large-scale solar energy applications.