Brian Kang

Chemical and Biomolecular Engineering

Faculty Advisor: Prashant Kamat

Winter 2020-21 Project: How Chloride Suppresses Photoinduced Phase Segregation in Mixed Halide Perovskites

In general, this research is focused on excited state properties of different types of perovskite materials. For this specific research project, chloride is used to stabilize the perovskite solar cells, and has a strong influence on halide ion mobility. Halide ion mobility is directed by the viscosity of the solvent and affects the overall performance of the perovskite solar cell, especially in terms of its stability. The research project aims to see how varying the concentration of chloride (in a range from 1-10%) will affect rate and amount of halide segregation from the mixed phase. The project also analyzes the change in activation energy depending on the amount of chloride introduced, investigating the excited state after the change of chloride concentration.