Halide perovskites are promising materials for tandem solar cell applications due to their easily tunable bandgap through cation and halide variations. However, photo-induced halide segregation in iodide-bromide perovskite chemistries often results in iodine-rich and bromine rich domains that limits the efficiency of tandem solar cells. One approach to mitigate such segregations reported in the literature is the addition of chlorine to the usual iodide-bromide perovskite compositions. With Gaussian process regression and other computational tools, we efficiently explore the cesium-formamidinium triple halide perovskite composition space and optimize for perovskite optical property and stability at the same time.

Research Advisor: Rebecca Belisle, Ph.D., Assistant Professor of Physics, Wellesley College Research Co-Advisor: Zachary del Rosario, Ph.D., Visiting Professor of Engineering, Olin College of Engineering Academic Advisor: Mark Somerville, Ph.D, Provost, Dean of Faculty, Professor of Electrical Engineering and Physics, Olin College of Engineering