Hidden spontaneous polarisation in the chalcohalide photovoltaic absorber Sn<sub>2</sub>SbS<sub>2</sub>I<sub>3</sub>
Seán R. Kavanagh, Christopher N. Savory, David O. Scanlon, Aron Walsh
Abstract
We reveal spontaneous symmetry breaking in an emerging class of mixed-metal chalcohalides, yielding strong lattice polarisation which could aid electron–hole separation in solar photovoltaics.
Topics & Concepts
PhotovoltaicsMaterials sciencePhotovoltaic systemOptoelectronicsElectronCopper indium gallium selenide solar cellsSolar cellPhysicsEcologyQuantum mechanicsBiologyPerovskite Materials and ApplicationsChalcogenide Semiconductor Thin FilmsSolid-state spectroscopy and crystallography