Relating Defect Luminescence and Nonradiative Charge Recombination in MAPbI<sub>3</sub> Perovskite Films
Alexander Dobrovolsky, Aboma Merdasa, Jun Li, Katrin Hirselandt, Eva Unger, Ivan G. Scheblykin
Abstract
. No correlation between PLQY and the relative intensity of the defect emission was found when micrometer-sized local regions of the same sample were compared. However, a clear positive correlation between the lower PLQY and higher defect emission was observed when two preparation methods were contrasted. Therefore, although the emissive defects are not connected directly with the nonradiative centers and may be spatially separated at the nano scale, chemical processes during the perovskite synthesis promote/prevent formation of both types of defects at the same time.
Topics & Concepts
LuminescenceRecombinationPerovskite (structure)Charge (physics)Materials scienceOptoelectronicsChemical physicsCharge carrierChemistryCrystallographyPhysicsBiochemistryQuantum mechanicsGenePerovskite Materials and ApplicationsOptical properties and cooling technologies in crystalline materialsSolid-state spectroscopy and crystallography