Cation Dynamics in Hybrid Halide Perovskites

Hybrid halide perovskite semiconductors exhibit complex, dynamical disorder while also harboring properties ideal for optoelectronic applications that include photovoltaics. However, these materials are structurally and compositionally distinct from traditional compound composed of tetrahedrally coordinated elements with an average valence electron count silicon. The additional dynamic degrees freedom hybrid perovskites underlie many their potentially transformative physical properties. Neutron scattering spectroscopy studies the atomic dynamics have yielded significant insights into functional Specifically, inelastic neutron has been used to elucidate phonon band structure, quasi-elastic revealed nature uncorrelated pertaining molecular reorientations. Understanding complex elucidated temperature-dependent phase stability origins defect-tolerant electronic transport highly polarizable dielectric response. Furthermore, provide opportunities application engineering innovation.