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RESEARCH PRODUCT
Effect of alkali metal nitrate treatment on the optical properties of CsPbBr3 nanocrystal films
Rafael AbarguesJuan P. Martínez-pastorVladimir S. ChirvonyHamid Pashaei AdlPedro J. Rodríguez-cantóAnanthakumar Soosaimanickamsubject
Materials scienceMechanical EngineeringPotassiumSodiumchemistry.chemical_elementPotassium nitrateCondensed Matter PhysicsAlkali metalchemistry.chemical_compoundchemistryNanocrystalMechanics of MaterialsOleylamineGeneral Materials ScienceThin filmNuclear chemistryPerovskite (structure)description
Abstract Colloidal cesium lead bromide (CsPbBr3) perovskite nanocrystals (NCs) are fabricated as densely packed thin films using doctor blade method through a layer-by-layer assembly approach. It is found that the optical properties of the CsPbBr3 NC films are significantly improved after a ligand exchange of oleic acid (OA) and oleylamine (OAm) by sodium and potassium nitrate in ethyl acetate. Ligand-induced surface defects are passivated by the sodium and potassium cations and nitrate, which leads to the improvement in photoluminescence (PL) and life-time properties. Compared with pristine OAm-OA capped CsPbBr3 NC film, Alkali-metal nitrate salts treated films are showing higher PL intensity and longer carrier-lifetime, evidencing their potential use to achieve defect-free inorganic perovskite NC films.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-12-01 | Materials Letters |