Structural distortion induced broad emission in vacancy-ordered halide triple perovskites
Maruthi Mala, Tamilselvan Appadurai, Aravind Kumar Chandiran
Abstract
) by mixing trivalent sites in three different halide compounds. The Raman and FT-far-IR measurements were used to investigate the distortion introduced in these materials. The distortion is shown to (i) enhance self-trapped excitonic emission, which is broad and intense leading to emission in the complete visible region and (ii) improve excited-state lifetimes. This strategy to create distortion and its proven ability to improve light emission will find application in light-emitting diodes.
Topics & Concepts
HalidePhotoluminescenceMaterials scienceExcited stateRaman spectroscopyDistortion (music)Perovskite (structure)AsymmetryOctahedronVacancy defectOptoelectronicsChemistryCrystallographyInorganic chemistryAtomic physicsOpticsCrystal structurePhysicsQuantum mechanicsCMOSAmplifierPerovskite Materials and ApplicationsSolid-state spectroscopy and crystallographyCrystal Structures and Properties