LAUSR

In this study, we investigate the influence of doping on the charge transfer and device characteristics parameters in the bulk heterojunction solar cells based on poly(3-hexylthiophene) (P3HT) and a methanofullerene derivative (PCBM). Organic semiconductors are also known to be not pure and they have defects and impurities, some of them are being charged and act as p-type or n-type dopants. Calculations of the solar cell characteristics parameters versus the p-doping level have been done at three different n-dopings () that consist of , , and . We perform the analysis of the doping concentration through the drift-diffusion model, and calculate the current and voltage doping dependency. We find that at three different n-dopant levels, optimum p-type doping is about . Simulation results have shown that by increasing doping level, monotonically increases by doping. Cell efficiency reaches its maximum at somewhat higher doping as FF has its peak at . Moreover, this paper demonstrates that the optimum value for the p-doping is about and optimum value for n-dopant is , respectively. The simulated results confirm that doping considerably affects the performance of organic solar cells.