Structural evolution, optical gap and thermoelectric properties of CH<sub>3</sub>NH<sub>3</sub>SnBr<sub>3</sub> hybrid perovskite, prepared by mechanochemistry
Carlos A. López, Carmen Abia, Javier Gainza, Paula Kayser, N. M. Nemes, Óscar J. Durá, J. L. Martı́nez, M. T. Fernández‐Díaz, M. Consuelo Álvarez‐Galván, J. A. Alonso
Abstract
From the cubic phase at RT, three superstructures are identified down to 120 K result from the octahedral SnBr<sub>6</sub> tilting and the stereochemical effect of Sn<sup>2+</sup> lone pair. The Seebeck coefficient is ∼2000 μV K<sup>−1</sup> at RT.
Topics & Concepts
Perovskite (structure)OctahedronThermoelectric effectSeebeck coefficientLone pairMechanochemistryThermoelectric materialsCrystallographyPhase (matter)Materials scienceCondensed matter physicsChemistryNanotechnologyPhysicsCrystal structureQuantum mechanicsMoleculePerovskite Materials and ApplicationsChalcogenide Semiconductor Thin FilmsSolid-state spectroscopy and crystallography