Dissertation > Excellent graduate degree dissertation topics show

Preparation and Properties of Rare Earth Ions-doped Oxide Luminescence Nanomaterials

Author: BaiHaiYing
Tutor: LiuGuiXia
School: Changchun University of Science and Technology
Course: Inorganic Chemistry
Keywords: Homogeneous precipitation method Hydrothermal method Sol - gel method . Core-shell Nano Luminescent Materials Rare earth oxides Surface effect Concentration quenching
CLC: TB383.1
Type: Master's thesis
Year: 2011
Downloads: 78
Quote: 0
Read: Download Dissertation

Abstract


Rare earth luminescent materials in the flat panel display has a wide range of applications in the field of green lighting, optical communications and laser devices. The rare earth oxides are excellent host material;, rare earth doped nanostructured luminescent material surface coated with a layer of undoped matrix material to reduce surface defects, has improved to a certain extent the luminescent properties of nanomaterials. In this paper, the homogeneous precipitation method, different morphology of the oxide luminescent materials and surface coated matrix of light-emitting materials were prepared by hydrothermal method and sol - gel method. Get some meaningful results: 1. Homogeneous precipitation method successfully synthesized uniform spherical Gd2O3: of Eu3 light-emitting materials and different shell thickness Gd2O3: core - shell structure of Eu3 @ Y2O3 luminescent materials, key research Gd2O3: Eu3 surface coated with different thickness of the matrix Y203 impact on the luminescence properties, and found that when the nucleation layer and the shell thickness ratio R = the luminous intensity ratio of 4:1, the uncoated - Gd2O3: Eu3 enhancement that nuclear - The shell samples lowering nano Gd2O3: the negative impact of Eu3 surface effect to the luminous intensity. By homogeneous precipitation method successfully synthesized the the different Eu3 doping concentration of Y2O3 of spherical: of Eu3 light-emitting materials and different doping concentration Y203: Eu3 @ Gd203 core-shell structure of the light-emitting materials. The fluorescence spectra: of Y2O3: of Eu3 spherical particle surface coating matrix Gd2O3, luminous intensity than the uncoated of Y2O3: Eu3 enhance luminous intensity difference of the core-shell structure particles and single particle quenching concentration of Eu3 ions. . Hydrothermal Synthesis of spherical YVO4: Eu3 light-emitting materials and coated matrix material GdVO4 with the law on its surface, the formation of a core-shell structure of YVO4: of Eu3 _AT_ the GdVO4 luminous Materials. The fluorescence spectra of YVO4: Eu3 surface coated GdVO4 after the emission intensity than the uncoated YVO4: Eu3 Zeng Qiang. 4 (1) by the sol - gel prepared by a smooth surface GdVO4: of Eu3 particles as well as the core-shell structure GdVO4: Eu3 @ GdVO4 light-emitting materials. Before coating diameter of about 310nm, the thickness of the cladding layer is approximately 45nm. (2) by hydrothermal method to prepare a sandwich structure of GdVO4: of Eu3 well as core-shell structure GdVO4: Eu3 @ YVO4 light-emitting material, coated prior to a diameter of about 310nm thickness of about 110nm. The cladding layer having a thickness of 10nm. The fluorescence spectra showed that: the core-shell structure prepared by the above two methods GdVO4: of Eu3 _AT_ LnVO4 (Ln = Gd, Y) luminous intensity than the uncoated enhanced.

Related Dissertations

  1. Study on the Synthesis Bi3.25La0.75Ti3O12（BLT） Nanotubes and Nano Wires,TB383.1
  2. Hydrothermal Synthesis of Oxide Hollow Spheres,TB383.4
  3. Study of Tin Alloy Carbon Composite Used for Lithium Ion Battery,TM912.9
  4. Multi-walled Carbon Nanotubes Au _AT_ of Pt, Au _AT_ of Pd core-shell structure of the catalyst preparation and electrochemical properties of,O643.36
  5. Synthesis and Characterization of Carbonate Intercalated Layered Double Hydroxides and Their Structure Recovery Properties,TQ424.2
  6. Cobalt Ferrite and Its Performance,O611.4
  7. Core-shell polymer microspheres synthesis, modification and application,O631.3
  8. Preparation of α-Fe2O3/Ag Core/Shell Nanocomposites and SERS Properties,TB383.1
  9. Synthesis of Novel Ferrite Pigments and Its Application on Magnetic Inks,TQ622.15
  10. Modification of Talc Powder and Its Reinforcing and Toughening on Recycled Polypropylene,TQ325.14
  11. The Research on Preparation Technology and Sintering Behavior of Rare Earth Aluminates (Dy3Al5O12、 NdAlO3、LaAl11O18),TB383.3
  12. Studies of High Refractive Index Materials Prepared by Nano ZrO2 and TiO2 Hybrid Silicone Epoxy Resin,TB383.1
  13. Preparation and Characterization of Al2O3/C Hybrid Aerogels and Al2O3 Aerogels,O648.17
  14. Preparation and Properties of Platinum-based Catalysts for Potential Use in PEMFCs,TM911.4
  15. Synthesis, Characterization and Catalytic Properties of Vanadium Oxide Nanomaterials,TB383.1
  16. The Study on Properties of Desulfurization and Denitrification by Mn/Al Catalysts,X773
  17. The Research of the Dye-Sensitized Nanocrystalline TiO2 Solar Cells,TM914.4
  18. Investigation into ZnO Thin Film Transistors Prepared by Sol-gel Method,TN321.5
  19. Novel core-shell structure of intelligent nano Synthesis and Characterization of Hydrogels,TB383.1
  20. Polyhedron iron micro and nano capsules Absorbing Materials Preparation and Properties,TB383.1
  21. Multi-layer multi sublattice study the physical properties of thin film materials,TB383.2

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile