Carrier localization in halide perovskites

Metal halide perovskites have attracted remarkable interest as promising materials for optoelectronic applications. One of the characteristics underpinning their performance is the nature of the photogenerated excess charges. Compounds from the family of halide perovskites are generally easily polarizable, which leads to strong charge-lattice interactions, and formation of polarons. I will discuss different types of polaronic states that have been predicted computationally in lead and tin based halide perovskites and how they can affect the properties of these materials. From a modeling perspective, I will also show how various effects, such as self-interaction, spin-orbit coupling and temperature affect the computed properties of the polaronic states.