NDLI: Morphology-controllable synthesis and enhanced luminescence properties of β-NaLuF<sub>4</sub>:Ln (Ln = Eu, Tb and Ce/Tb) microcrystals by solvothermal process

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Xiao Zhang, Zhenguo Wang, Dong Bai, Ling Li, Xingbo Yang, Piaoping Niu, Na Gai, Shili He, Fei
Copyright Year	2012
Abstract	Controlled synthesis of β-NaLuF4 with uniform morphology, dimension and considerable monodispersity was designed via a gentle solvothermal process by using ethylenediamine (EDA) and ethylene glycol (EG) as the mixed solvent and NaNO3 as a mineralizer. X-ray diffraction (XRD), field scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectra (EDS) and down-conversion (DC) photoluminescence spectra were used to characterize the samples. The results indicate that the as-prepared β-NaLuF4 microcrystals can be rationally modified in phase, size and morphology by tuning the solvent constitution, NaNO3 content, and reaction time. Moreover, the crystal growth process was thoroughly discussed through a series of time-dependent experiments and a possible formation mechanism was proposed. Furthermore, the DC luminescence properties as well as the emission mechanisms of β-NaLuF4:Ln3+ (Ln = Eu, Tb and Ce/Tb) microcrystals were systematically investigated. It is found that the DC luminescence properties can be improved observably by introducing Ce3+ into the β-NaLuF4 microcrystals and the doping concentration of the Ce3+ is optimized under a fixed concentration of Tb3+. It is expected that the synthesis strategy can be applied to prepare many other types of micro- and nano-crystals as well.
Starting Page	7569
Ending Page	7577
Page Count	9
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	2
Issue Number	19
Journal	RSC Advances
DOI	10.1039/c2ra20675g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Dispersity Ethylene glycol High-resolution transmission electron microscopy Sodium nitrate Photoluminescence Luminescence Scanning electron microscope X-ray crystallography Ethylenediamine Transmission electron microscopy Electronic design automation Dopant Solvent
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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