Design of outstanding random-patterns surface for enhancement of light scattering in Perovskite solar cell

Glass texturing is an efficient method for changing the surface morphology to enhance the solar cell spectral response. In this study, we present a method for optimizing the light scattering (LS) properties of uneven surface with random-patterns for perovskite solar cell (PSC) applications. Glass substrates were textured with a random structure assisted wet etching process using diluted hydrofluoric acid solution at a constant concentration of etchants. Then, the light trapping (LT) properties of suitable films were controlled over a wide range by varying the etching time (1-5min.). The optical properties of the surface and the reflection efficiency of the rugged surface should be maximized in the visible region at 5min. As a result in terms of short-circuit current density (Jsc), a gain of 23.0mA/cm² (more than 29.9%) and power conversion efficiency (PCE) of 12.3% (more than 31.7%) are achieved with the introduction of textured interface.