Effect of doping on the phase stability and photophysical properties of CsPbI<sub>2</sub>Br perovskite thin films
Lahoucine Atourki, Mari Bernabé, M. Makha, K. Bouabid, Mohammed Regragui, A. Ihlal, M. Abd-Lefdil, M. Mollar
Abstract
Br perovskite films using the temperature dependent photoluminescence technique. We found that the Cl ions enhance the photoluminescence emission by reducing the density of trap states, and also decrease the exciton binding energy from (22 ± 3) meV to (11 ± 2) meV. We believe this work contributes to understanding the effect of doping on the crystallization process with an in-depth insight into the photophysical properties of the cesium-based perovskite materials.
Topics & Concepts
Perovskite (structure)DopingThin filmPhase (matter)Materials scienceStability (learning theory)OptoelectronicsChemistryNanotechnologyCrystallographyComputer scienceOrganic chemistryMachine learningPerovskite Materials and ApplicationsChalcogenide Semiconductor Thin FilmsSolid-state spectroscopy and crystallography