Limits to Electrical Mobility in Lead-Halide Perovskite Semiconductors
Chelsea Q. Xia, Jiali Peng, Samuel Poncé, Jay B. Patel, Adam D. Wright, Timothy W. Crothers, Mathias Uller Rothmann, Juliane Borchert, Rebecca L. Milot, Hans Kraus, Qianqian Lin, Feliciano Giustino, Laura M. Herz, Michael B. Johnston
Abstract
. We show that Fröhlich scattering of charge carriers with multiple phonon modes is the dominant mechanism limiting mobility, with grain-boundary scattering further reducing mobility in polycrystalline films. We reconcile the large discrepancy in charge-carrier diffusion lengths between single crystals and films by considering photon reabsorption. Thus, polycrystalline films of MHPs offer great promise for devices beyond solar cells, including light-emitting diodes and modulators.
Topics & Concepts
Materials scienceCrystalliteSemiconductorGrain boundaryElectron mobilityCharge carrierScatteringPerovskite (structure)Single crystalOptoelectronicsCondensed matter physicsPhonon scatteringCarrier scatteringPhononCrystallographyChemistryOpticsPhysicsMicrostructureComposite materialMetallurgyPerovskite Materials and ApplicationsSolid-state spectroscopy and crystallography2D Materials and Applications