Bimetallic core-shell nanoparticles to improve the absorption of P3HT: PCBM organic solar cell

In this paper, we have theoretically studied a poly (3-hexylthiophene): 6,6-phenyl C61-butyric acid methyl ester (P3HT: PCBM) organic solar cell with randomly dispersed bimetallic nanoparticles. We have considered bimetallic core-shell Ag-Au nanoparticles as scattering centers randomly distributed among the active layer of a P3HT: PCBM solar cell. To study the role of Ag-Au nanoparticles, we have used the effective medium theory. The extinction and scattering cross sections of core-shells have been calculated based on the extended Mie theory. The scattering cross section of the active layer has been calculated by combining the extended Mie theory with the effective medium theory. The calculated current-voltage curve of solar cells has been compared with the experimental data of similar works to check the model's validity. In the optimized situation, it shows good agreement with experimental data, and we have obtained about 59% enhancement in the short circuit current of the solar cell.