Solar absorptivity analysis of nanostructure perovskite solar cell

Perovskite solar cell is a promising alternative to silicon solar cells; it is cheaper and more environmentally friendly to fabricate with comparable power conversion efficiency. This research investigated the enhancement of the solar absorptivity of a planar structure perovskite solar cell by implementing various nanostructures. Four different glass nanostructure architectures, including nanocone, nanopyramid, nanotube, and nanorod placed at the initial top layer of the cell, were simulated using the three-dimensional finite element method. We studied the effects of nanostructure architecture's varying height and domain area on solar absorptivity. The result showed that the tapered shapes had higher solar absorptivity with increased height. The nanocone with a domain area of 300 nm × 300 nm at the tallest height of 200 nm had the most significant solar absorptivity enhancement with 407 W/m2 of integrated irradiance, 3.3% higher compared to the planar structure. In addition, the analysis of integrated irradiance using AM 1.5 G of different nanocone domain areas revealed various local maxima and minima. These findings suggest an alternative design option to increase efficiency without texturing the active perovskite cell layer.