Adjustment of the eccentricity and random distribution of embedded ellipsoidal Ag nanoparticles to boost optical properties of PSC

Both the shape and distribution of embedded plasmon nanoparticles within the absorption layer are crucial factors affecting the optical properties of solar cells significantly. Herein, by employing a finite element method (FEM), we proposed a perovskite solar cell (PSC) by introducing a layer of position-randomly-distributed (PRD) ellipsoidal Ag nanoparticles in the CH3NH3PbI3 thin film as they provide prototype nanoparticles encountered in experiments. The corresponding absorption spectra and photocurrent were calculated and optimized as a function of both their eccentricity and coverage, which are elucidated well in terms of their EM distributions. The maximum photocurrent is revealed to reach 22.68 mA/cm2, which is 1.18 times larger than that of planar reference. The present work is believed to be insightful for further boosting the optical efficiency of PSCs and easy of choosing appropriate coverage ratio and eccentricity of the embedded ellipsoidal Ag nanoparticles.