SiO₂ Nanosphere for Reducing Reflection in Perovskite Solar Cell by Using Ansys Lumerical

This study presents the potential of Mie scattering-based light trapping for enhancing the performance of perovskite solar cells by using spherical nanostructure. Utilizing the Lumerical FDTD simulations, investigation of the influence of SiO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> nanosphere with varying radii ($\mathbf{5 0 - 2 5 0} \mathbf{n m}$) placed on the cell surface had been studied. The results revealed significant improvements in light absorption, reduced reflection losses and enhanced generation rates due to the incorporation of the sphere. Notably, a $\mathbf{2 8 \%}$ reduction in reflection loss led to a remarkable boost in electrical performance of the solar cell. Later, the Lumerical CHARGE Solver analysis of the atop sphere cell showed superior electrical parameters compared to the planar cell, as the results demonstrated Voc 0.995 V, Jsc $23.44 \mathrm{~mA} / \mathrm{cm}^{2}$, FF 89.7%, and PCE of 20.91% compared to 19.57% PCE for the planar cell (without the atop sphere). This work demonstrates the promising potential of Mie scattering for improving perovskite solar cell efficiency, paving the way for further exploration of nano-spherical arrays and alternative materials for even greater performance optimization.