Premium
Fluorinated Eu‐Doped SnO 2 Nanostructures with Simultaneous Phase and Shape Control and Improved Photoluminescence
Author(s) -
Wang Hongkang,
Wang Yu,
Kershaw Stephen V.,
Hung Tak Fu,
Xu Jun,
Rogach Andrey L.
Publication year - 2013
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201200096
Subject(s) - photoluminescence , x ray photoelectron spectroscopy , materials science , doping , transmission electron microscopy , spectroscopy , scanning electron microscope , ion , crystallography , analytical chemistry (journal) , high resolution transmission electron microscopy , nanotechnology , chemistry , chemical engineering , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics , engineering , composite material
Fluorinated Eu‐doped SnO 2 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 Eu 3+ ions are uniformly embedded into SnO 2 nanocrystallites either through substitution of Sn 4+ ions or through formation of Eu‐F bonds, allowing for high‐level Eu 3+ doping. Photoluminescence features such as transition intensity ratios and Stark splitting indicate diverse localization of Eu 3+ ions in the SnO 2 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 SnO 2 nanocrystallites efficiently inhibits the hydroxyl quenching effect, which accounts for their improved photoluminescence intensity.