Enhancement of Organic Solar Cell Absorption by ZnO and LiF Insertion within the Active Layer

Optical performance enhancement of organic solar cells is crucial to achieve high power conversion efficiency. The active layer is the only layer that is of interest. A modified active layer of P3HT:PCBM with nanoparticles of ZnO and LiF are embedded in the active layer. The optical outcomes showed an increase in the absorption by 4.67% compared to the case without ZnO and LiF. Spacing between ZnO and LiF along with their dimensions are important to absorption enhancement. Compact spacing between ZnO and LiF inhibits light absorption due to large reflection. A maximum increase in current by 17% is achieved for a ZnO radius (r = 15nm), LiF dimensions of ( W = 30nm,H = 60nm), spacing between ZnO and LiF (s =35nm), active layer length (l =200nm), and P3HT:PCBM thickness(t =100nm) © 2023 IEEE.