On aesthetical appearance of colored perovskite solar modules

Color aesthetics in photovoltaic modules are essential, especially in design-sensitive applications like building integrated photovoltaics (BIPV). Distributed Bragg reflector-based color filters can modify the appearance of silicon solar cells. This study extends the aesthetic evaluation to emerging perovskite solar cells, typically gray-brown, by integrating them with a MorphoColor® color filter. We present simulated and measured angular resolved reflectance measurements and evaluate the color appearance from varied viewing angles. The used simulation environment is based on wave optics and raytracing. Next, we study the impact of individual layer parameters on the color appearance and the maximum achievable short circuit current density in the perovskite solar cell. Findings show that changes in color filter-perovskite interfacing layers influence the saturation and hue of the color impression as well as the angular color stability. Finally, we present initial concepts of optimizing the specific layer stack, demonstrating its potential to tailor a customized color design.