Journal ArticleDOI
Shape-Controllable Synthesis and Morphology-Dependent Luminescence Properties of GaOOH:Dy3+ and β-Ga2O3:Dy3+
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TLDR
The beta-Ga(2)O(3):Dy(3+) phosphor with a submicroellipsoid shape shows the highest relative emission intensity and quantum yield compared with other morphologies, and the obtained phosphors have potential applications in the areas of fluorescent lamps and field emission displays (FEDs).Abstract:
Dy3+-doped gallium oxide hydroxides (GaOOH:Dy3+) with various morphologies (submicrospindles, submicroellipsoids, 3D hierarchical microspheres) were synthesized by a facile soft-chemical method. After annealing at 1000 °C, the GaOOH:Dy3+ precursor was easily converted to β-Ga2O3:Dy3+ phosphors which kept their original morphologies. The as-prepared GaOOH:Dy3+ and β-Ga2O3:Dy3+ products were characterized using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), low- to high-resolution transmission electron microscopy (TEM), selected area electron diffraction (SAED), photoluminescence (PL) spectra, cathodoluminescence (CL) spectra, and quantum yield (QY). With an increase in pH from 4 to 9, the morphology of GaOOH:Dy3+ varied from submicrospindles to 3D hierarchical microspheres of self-assembled nanoparticles. A possible mechanism for the formation of various morphologies of GaOOH:Dy3+ and β-Ga2O3:Dy3+ was proposed. Under ultraviolet and low-voltage electron beam excitation, the p...read more
Citations
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Recent progress in low-voltage cathodoluminescent materials: synthesis, improvement and emission properties
Guogang Li,Guogang Li,Jun Lin +2 more
TL;DR: This review summaries the recent progress in the chemical synthesis and improvement of novel, rare-earth and transition metal ions activated inorganic cathodoluminescent materials in powder and thin film forms and discusses the research prospects and future directions of FED phosphors.
Journal ArticleDOI
Eu3+/Tb3+-doped La2O2CO3/La2O3 nano/microcrystals with multiform morphologies: facile synthesis, growth mechanism, and luminescence properties.
Guogang Li,Chong Peng,Cuimiao Zhang,Zhenhe Xu,Mengmeng Shang,Dongmei Yang,Xiaojiao Kang,Wenxin Wang,Chunxia Li,Ziyong Cheng,Jun Lin +10 more
TL;DR: A series of controlled experiments indicate that the pH values in the initial reaction systems, carbon sources, and simple ions were responsible for the shape determination of the LaCO(3)OH products.
Journal ArticleDOI
Luminescence and Energy Transfer Properties of Ca2Ba3(PO4)3Cl and Ca2Ba3(PO4)3Cl:A (A = Eu2+/Ce3+/Dy3+/Tb3+) under UV and Low-Voltage Electron Beam Excitation
TL;DR: Under the low voltage electron beam excitation, Tb(3+) ion doped Ca2Ba3(PO4)3Cl samples present different luminescence properties compared with their PL spectra, which is ascribed to the different excitation mechanism.
Journal ArticleDOI
Luminescence and energy transfer of Eu3+ or/and Dy3+ co-doped in Sr3AlO4F phosphors with NUV excitation for WLEDs
Vengala Rao Bandi,Bhaskar Kumar Grandhe,Hyun-Joo Woo,Kiwan Jang,Dong-Soo Shin,Soung Soo Yi,Jung Hyun Jeong +6 more
TL;DR: In this paper, a single doped and codoped Sr3AlO4F phosphors were prepared in a reducing atmosphere by the conventional solid-state reaction method, and the XRD was used to confirm the crystal structure of the phosphors and their photoluminescence (PL) properties were studied by the excitation and emission spectra.
Journal ArticleDOI
Controllable synthesis and tunable luminescence properties of Y2(WO4)3:Ln3+ (Ln = Eu, Yb/Er, Yb/Tm and Yb/Ho) 3D hierarchical architectures
TL;DR: The results reveal that the morphology and dimensions of the as-prepared precursors can be effectively tuned by altering the amounts of organic SDBS and the reaction time, and the possible formation mechanism was also proposed.
References
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Journal ArticleDOI
Semiconductor Clusters, Nanocrystals, and Quantum Dots
TL;DR: In this article, the authors focus on the properties of quantum dots and their ability to join the dots into complex assemblies creates many opportunities for scientific discovery, such as the ability of joining the dots to complex assemblies.
Journal ArticleDOI
One‐Dimensional Nanostructures: Synthesis, Characterization, and Applications
Younan Xia,Peidong Yang,Yugang Sun,Yiying Wu,Brian Mayers,Byron D. Gates,Yadong Yin,Franklin Kim,Haoquan Yan +8 more
TL;DR: A comprehensive review of 1D nanostructures can be found in this article, where the authors provide a comprehensive overview of current research activities that concentrate on one-dimensional (1D) nanostructure (wires, rods, belts and tubes).
Journal ArticleDOI
Chemistry and properties of nanocrystals of different shapes.
TL;DR: The interest in nanoscale materials stems from the fact that new properties are acquired at this length scale and, equally important, that these properties are equally important.
Journal ArticleDOI
Monodisperse FePt Nanoparticles and Ferromagnetic FePt Nanocrystal Superlattices
TL;DR: Thermal annealing converts the internal particle structure from a chemically disordered face- centered cubic phase to the chemically ordered face-centered tetragonal phase and transforms the nanoparticle superlattices into ferromagnetic nanocrystal assemblies that can support high-density magnetization reversal transitions.
Journal ArticleDOI
Imperfect Oriented Attachment: Dislocation Generation in Defect-Free Nanocrystals
R. Lee Penn,Jillian F. Banfield +1 more
TL;DR: Spiral growth at two or more closely spaced screw dislocations provides a mechanism for generating complex polytypic and polymorphic structures and is of fundamental importance to understanding crystal growth.