Effective Stabilization of Perovskite Cesium Lead Bromide Nanocrystals through Facile Surface Modification by Perfluorocarbon Acid
Daichi Sato, Yoshiki Iso, Tetsuhiko Isobe
Abstract
NCs. Oleic acid (OA) adsorbed on the NCs was exchanged for decanoic acid (DA) and PFDA. OA-modified and DA-modified NCs exhibited drastic fluorescence quenching to 12.9 and 21.1% of their initial PL intensities, respectively, after heating at 100 °C for 4 h. In contrast, the PFDA-modified NCs maintained 92.1% of their PL intensity after the same heating. Furthermore, the polar solvent resistance was also improved by PFDA modification. These improvements can be attributed to the strong adsorptivity and high chemical stability of the PFDA ligand.
Topics & Concepts
Perovskite (structure)NanocrystalPhotoluminescenceSurface modificationLigand (biochemistry)Chemical stabilityMaterials scienceAdsorptionThermal stabilityQuenching (fluorescence)Chemical modificationChemistryChemical engineeringPhotochemistryFluorescenceInorganic chemistryNanotechnologyPhysical chemistryOrganic chemistryPolymer chemistryReceptorPhysicsBiochemistryOptoelectronicsEngineeringQuantum mechanicsPerovskite Materials and Applications2D Materials and ApplicationsSolid-state spectroscopy and crystallography