Phonon-Mediated and Weakly Size-Dependent Electron and Hole Cooling in CsPbBr<sub>3</sub> Nanocrystals Revealed by Atomistic Simulations and Ultrafast Spectroscopy
Simon C. Boehme, Stephanie ten Brinck, Jorick Maes, Nuri Yazdani, Felipe Zapata, Kai Chen, Vanessa Wood, Justin M. Hodgkiss, Zeger Hens, Pieter Geiregat, Ivan Infante
Abstract
, increasing weakly with size. Our ab initio simulations suggest that cooling proceeds via fast phonon-mediated intraband transitions driven by strong and size-dependent electron-phonon coupling. The presented experimental and computational methods yield the spectrum of involved phonons and may guide the development of devices utilizing hot charge carriers.
Topics & Concepts
PolaronCharge carrierElectronPhononMaterials scienceCondensed matter physicsPhotoluminescenceSpectroscopyNanocrystalPerovskite (structure)Ultrafast laser spectroscopyMolecular physicsChemistryPhysicsNanotechnologyOptoelectronicsCrystallographyQuantum mechanicsPerovskite Materials and ApplicationsOptical properties and cooling technologies in crystalline materialsSolid-state spectroscopy and crystallography