Efficient near-infrared emission from lead-free ytterbium-doped cesium bismuth halide perovskites
Minh N. Tran, Iver J. Cleveland, Gregory A. Pustorino, Eray S. Aydil
Abstract
Yb doping of Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> results in near-infrared luminescence with 14.5% quantum yield when excited with above bandgap photons. This emission decreases sharply when bandgap is reduced below twice the emission energy raising the possibility that the mechanism involves quantum cutting.
Topics & Concepts
YtterbiumBismuthDopingHalideExcited stateInfraredMaterials scienceCaesiumLuminescenceQuantum yieldBand gapOptoelectronicsAtomic physicsInorganic chemistryChemistryOpticsPhysicsFluorescenceMetallurgyPerovskite Materials and ApplicationsOptical properties and cooling technologies in crystalline materialsSolid-state spectroscopy and crystallography