Excitons in metal halide perovskite nanoplatelets: an effective mass description of polaronic, dielectric and quantum confinement effects
comunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/174799
comunitat-uji-handle3:10234/174800
comunitat-uji-handle4:
INVESTIGACIONMetadata
Title
Excitons in metal halide perovskite nanoplatelets: an effective mass description of polaronic, dielectric and quantum confinement effectsDate
2023Publisher
Royal Society of ChemistryBibliographic citation
Nanoscale Adv., 2023, 5, 6093-6101Type
info:eu-repo/semantics/articlePublisher version
https://pubs.rsc.org/en/content/articlelanding/2023/na/d3na00592eVersion
info:eu-repo/semantics/publishedVersionAbstract
A theoretical model for excitons confined in metal halide perovskite nanoplatelets is presented. The model accounts for quantum confinement, dielectric confinement, short and long range polaron interactions by means ... [+]
A theoretical model for excitons confined in metal halide perovskite nanoplatelets is presented. The model accounts for quantum confinement, dielectric confinement, short and long range polaron interactions by means of effective mass theory, image charges and Haken potentials. We use it to describe the band edge exciton of MAPbI3 structures surrounded by organic ligands. It is shown that the quasi-2D quantum and dielectric confinement squeezes the exciton radius, and this in turn enhances short-range polaron effects as compared to 3D structures. Dielectric screening is then weaker than expected from the static dielectric constant. This boosts the binding energies and radiative recombination probabilities, which is a requisite to match experimental data in related systems. The thickness dependence of Coulomb polarization and self-energy potentials is in fair agreement with sophisticated atomistic models. [-]
Is part of
Nanoscale Advances, 2023Funder Name
Ministerio de Ciencia e Innovación | Generalitat Valenciana
Project code
PID2021-128659NBI00 | MCIN/AEI/10.13039/501100011033 | 22I235-CIPROM/2021/078
Rights
info:eu-repo/semantics/openAccess
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