Fluorinated Eu‐Doped SnO₂ Nanostructures with Simultaneous Phase and Shape Control and Improved Photoluminescence

Abstract

Fluorinated Eu‐doped SnO2 nanostructures with tunable morphology (shuttle‐like and ring‐like) are prepared by a hydrothermal method, using NaF as the morphology controlling agent. X‐ray diffraction, field‐emission scanning electron microscopy, high‐resolution transmission electron microscopy, X‐ray photoelectron spectroscopy, and energy dispersive spectroscopy are used to characterize their phase, shape, lattice structure, composition, and element distribution. The data suggest that Eu3+ ions are uniformly embedded into SnO2 nanocrystallites either through substitution of Sn4+ ions or through formation of Eu‐F bonds, allowing for high‐level Eu3+ doping. Photoluminescence features such as transition intensity ratios and Stark splitting indicate diverse localization of Eu3+ ions in the SnO2 nanoparticles, either in the crystalline lattice or in the grain boundaries. Due to formation of Eu‐F and Sn‐F bonds, the fluorinated surface of SnO2 nanocrystallites efficiently inhibits the hydroxyl quenching effect, which accounts for their improved photoluminescence intensity.

Photoluminescence profile mapping of Eu(iii) and Tb(III → IV)-embedded in quantum size SnO2 nanoparticles

“…13,15,16,19,20 SnO 2 -based materials have been extensively used as supports for improving luminescence efficiency. 22,23 Eu(III) ions are the materials that have been most extensively used for development of red phosphor materials due to their unique 5 D 0 / 7 F J (J ¼ 0, 1, 2, 3, 4) transition emission. Luminescence of Eu(III) has been used as a probe for material characterization (e.g., size estimation) and biomedical application (e.g., cell imaging and drug location).…”

Fluoride-assisted coaxial growth of SnO2over-layers on multiwall carbon nanotubes with controlled thickness for lithium ion batteries

“…According to our previous report, 17,[30][31][32] NaF, as a morphology controlling agent, can regulate and promote the formation of hierarchical SnO 2 micro/nanostructures. Herein, we demonstrated the controlling effect of NaF on the coaxial growth of SnO 2 over-layers on MWCNTs.…”

Influencia de la potencia de deposición en las propiedades eléctricas y ópticas de películas delgadas de Sn1-xO2Nbx obtenidas por pulverización catódica

“…The electrical conductivity of SnO 2 and other physical properties can be improved and affected by the presence of doping elements such as F, Sb, V, Ta, Nb [15][16][17][18]. Especially the charrier density can be increased when the tin oxide is doped with niobium, because it has oxidation states of +3, and +5, and the tin oxidation states are +2, +4, making an additional charge carrier on conduction band [19].…”