Optimization strategies for colorful thin film solar cells

Color aesthetics of photovoltaic modules is essential fordesign-sensitive applications, like building integrated photovoltaics (BIPV). Distributed Bragg reflector-based color filters modify the appearance of silicon solar cells. This study extends the aesthetic evaluation to emerging perovskite solar cells - typically grey or brown - by equipping them with a color filter. In this contribution we present an numerical optimization study which assesses parameters such as number of layers, total color filter height, materials choices and texture roughness for color appearance and efficiency within realistic manufacturing constraints. We use Bayesian optimization approaches for color filter design and focus on objective function definition. Finally, we present a selection of high performance ed perovskite solar cells, demonstrating the potential of our algorithm to tailor a customized color design.