Performance enhancement of perovskite solar cells through plasmonic titanium nitride nanoparticles

This work addresses enhancing the performance of Perovskite solar cells by incorporating ellipsoid plasmonic nanoparticles of Titanium Nitride (TiN) into the pure methylammonium lead iodide (CH₃NH₃PbI₃) active layer. The device structure consists of ITO/TiO₂/CH₃NH₃PbI₃/PEDOT: PSS/Au. The study is conducted using finite difference time domain method for the optical studies and SCAPS-1D software for the electrical parameters, the proposed structure managed to boost the absorption of the perovskite solar cell to levels more than 90% in the visible and near infrared range (NIR), and a broad absorption band from 400 nm to 1200 nm is obtained, which is reflected as an electrical performance with short circuit current density of 46.84 mA/ cm², and open circuit voltage of 0.8924 V, a fill factor of 76.22%, and an impressive power conversion efficiency of 31.8%. These results showcase the plasmonic potential of TiN refractory metal nanoparticles in enhancing the performance of perovskite solar cells.