NDLI: Highly uniform and monodisperse $GdOF:Ln^{3+}$ (Ln = Eu, Tb, Tm, Dy, Ho, Sm) microspheres: hydrothermal synthesis and tunable-luminescence properties

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Highly uniform and monodisperse $GdOF:Ln^{3+}$ (Ln = Eu, Tb, Tm, Dy, Ho, Sm) microspheres: hydrothermal synthesis and tunable-luminescence properties

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Highly uniform and monodisperse $GdOF:Ln^{3+}$ (Ln = Eu, Tb, Tm, Dy, Ho, Sm) microspheres: hydrothermal synthesis and tunable-luminescence properties

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kang, Xiaojiao Zhang, Yang Geng, Dongling Lin, Jun Shang, Mengmeng Wu, Yuan Lian, Hongzhou Cheng, Ziyong Li, Xuejiao
Description	Author Affiliation: Zhang Y ( State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China. jlin@ciac.ac.cn.)
Abstract	$GdOF:Ln^{3+}$ (Ln = Eu, Tb, Tm, Dy, Ho and Sm) microspheres (1.5 μm) with high uniformity and monodispersity have been synthesized via a facile hydrothermal method followed by heat treatment (600 °C). X-Ray diffraction ( XRD ), Fourier transform infrared spectroscopy ( FT-IR ), scanning electron microscopy ( SEM ), transmission electron microscopy ( TEM ), as well as photoluminescence (PL) and cathodoluminescence (CL) spectra are used to characterize the resulting samples. A series of controlled experiments indicate that sodium citrate $(Cit^{3−})$ as a shape modifier introduced into the reaction system plays a critical role in the shape evolution of the final products. Furthermore, the shape and size of the products can be further manipulated by adjusting the dosage of $Cit^{3−}$ and pH values in the initial solution. The possible formation mechanism for these microspheres has been presented. Under UV light and low-voltage electron beam excitation, $GdOF:Ln^{3+}$ microspheres show the characteristic f–f transitions of $Ln^{3+}$ (Eu, Tb/Ho, Tm, Dy and Sm) ions and give bright red, green, blue, yellow and yellowish-orange emission, respectively. In addition, multicolored luminescence containing white emission have been successfully confected for co-doped $GdOF:Ln^{3+}$ phosphors by changing the doped $Ln^{3+}$ ions and adjusting their doping concentrations due to the simultaneous luminescence of $Ln^{3+}$ in the GdOF host, making these materials have potential applications in field-emission display devices.
ISSN	14779226
Issue Number	39
Volume Number	42
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2013-10-21
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Gadolinium Chemistry Lanthanoid Series Elements Microspheres Citrates Dysprosium Europium Holmium Luminescent Measurements Samarium Terbium Thulium Ultraviolet Rays Journal Article Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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