Effect of disorder on transport properties in a tight-binding model for lead halide perovskites.

ABSTRACT: The hybrid organic-inorganic lead halide perovskite materials have emerged as remarkable materials for photovoltaic applications. Their strengths include good electric transport properties in spite of the disorder inherent in them. Motivated by this observation, we analyze the effects of disorder on the energy eigenstates of a tight-binding model of these materials. In particular, we analyze the spatial extension of the energy eigenstates, which is quantified by the inverse participation ratio. This parameter exhibits a tendency, and possibly a phase transition, to localization as the on-site energy disorder strength is increased. However, we argue that the disorder in the lead halide perovskites corresponds to a point in the regime of highly delocalized states. Our results also suggest th

SUBMITTER: Ashhab S 

PROVIDER: S-EPMC5566430 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature