Plasmonic absorption enhancement of MAPI-based perovskite solar cell with nanoparticles array

Abstract

In this work, we propose a MAPI-based p-i-n perovskite solar cell with architecture ITO/PEDOT:PSS/MAPI/Rhodamine/TiO2/Ag. Although MAPI-based solar cells have prominent performance, there are some challenges for these devices. Poor optical absorption at near-infrared wavelengths is the most important challenge for MAPI-based solar cells. The effect of three kinds of periodic array nanoparticles on the absorption spectra of the perovskite layer has been investigated theoretically. The spherical bare Au nanoparticle, Au@SiO2, and Au@TiO2 core–shell nanorods have been used. Moreover, Rhodamine as a surface passivator to decrease the charge carrier recombination is used between perovskite and Electron Transport Layer (ETL). Our simulation is based on three dimensions Finite-Difference Time-Domain (FDTD) method and we use Lumerical software. The effect of these nanoparticles on electric field intensity, light absorption, short-circuit current density, and generation rate are investigated for the visible and near-infrared bands. We found that Au@TiO2 can improve light absorption more than Au and Au@SiO2 at the near-infrared band and this increment is due to the growth of plasmonic near-field of nanoparticles and light scattering enhancement from these nanoparticles.