Enhanced performance of perovskite solar cell by using wavy pattern microstructure antireflective foil as a front surface

Perovskite solar cells (PSCs) have been considered promising photovoltaic technology, given their potential to achieve high power conversion efficiency (PCE) and simple preparation technology. Improving the efficiency of PSCs has always been one of the hot issues concerned by researchers since the first PSCs were reported. In this paper, the PSCs with the structure of glass/ITO/poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]/perovskite/C-60/atomic layer deposition device SnO (x) /Ag were carefully designed and prepared, and two kinds of polydimethylsiloxane (PDMS) film were scheduled and used in front surfaces of the prepared PSCs as the antireflective foil, which effectively improved the performance of PSCs. Compared with the control device, the short-circuit current density (J (SC)) and PCE for the PSCs with flat or wavy pattern microstructure PDMS antireflective foil as front surfaces can be improved simultaneously, reaching 22.67 mA cm(-2) and 20.57%, increased by 8.5% and 8.8%, respectively. The improvement of device performance can be ascribed to the advancement of light absorption and reduction of light reflectance by using the wavy pattern microstructure PDMS antireflective foil at the front surface. Lastly, the working mechanism of wavy pattern microstructure PDMS antireflective foil was discussed. This work can provide a facile way to improve the performance of PSCs.