# Performance enhancement of perovskite solar cells through plasmonic titanium nitride nanoparticles

## TL;DR

This paper shows that adding titanium nitride nanoparticles to perovskite solar cells significantly improves their efficiency by boosting light absorption and electrical performance.

## Contribution

The novel use of plasmonic titanium nitride nanoparticles in perovskite solar cells to achieve high absorption and efficiency is presented.

## Key findings

- TiN nanoparticles increased visible and near-infrared absorption to over 90%.
- The solar cell achieved a power conversion efficiency of 31.8%.
- A broad absorption band from 400 nm to 1200 nm was observed.

## Abstract

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.