Improving the Absorption Bandwidth in Carbon-Based Perovskite Cells with A Combined Light Trapping Structure

The research introduces a hybrid light trapping structure designed to enhance the absorption ‎bandwidth in carbon-based perovskite solar cells. Silver nanoparticles coated with silica are ‎included within the active layer of this structure. An anti-reflective coating is applied to the ‎upper surface to enhance the absorption of additional wavelengths. The influence of geometric ‎parameters, such as the radius and period of silver nanoparticles, the thickness of the silica ‎protective shell, and the thickness of the anti-reflection coating, on light absorption is ‎examined. The finite difference time domain technique in Lumerical software is employed to ‎examine the specified parameters. A carbon-based perovskite solar cell was first introduced as ‎a reference, followed by an examination of the proposed structure utilizing various geometric ‎light absorption factors. The simulation findings indicate that nearly total light absorption may ‎be attained using the ideal structural parameters for a 600 nm thick perovskite layer utilizing ‎this configuration. A short-circuit current density of 25.264 mA/cm² can be attained utilizing ‎silver-silica nanoparticles with a radius of 100 nm, a period of 280 nm, and a 60 nm thick ‎PMMA anti-reflection coating over a 600 nm thick perovskite layer. This metric indicates a ‎‎22% enhancement relative to carbon-based perovskite solar cells lacking light control. The ‎suggested hybrid light-trapping architecture enhances light usage and reduces material ‎consumption in carbon-based perovskite solar cells.‎‎