eng Oriental Scientific Publishing Company Material Science Research India 0973-3469 2026-01-09 22 3 183 193 23956 article Sanjay Narayan Barman 1 Pinaki Laha 1 Department of Physics, B.R. Ambedkar Bihar University, Muzaffarpur 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 (V_OC), short-circuit current density (J_SC), 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 (V_OC), and short-circuit current density (J_SC). The best performance is of tandem organic solar cell is achieved at a work function of 5.2 eV, with a J_SC of 2.598 mA/cm², V_OC 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. https://www.materialsciencejournal.org/vol22no3/impact-of-pedot-pss-electrode-work-function-on-dppeznp-tbo-based-active-layer-in-tandem-organic-solar-cells/ DPPEZnP-TBO fill factor (FF) Organic tandem solar cells Power conversion efficiency (PCE) Work function