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Host-Sensitized Luminescence of Nd<sup>3+</sup>and Sm<sup>3+</sup>Ions Incorporated in Anatase Titania Nanocrystals
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2009
Year
Materials ScienceInorganic ChemistryTio2 NanoparticlesSol−gel Solvothermal MethodEngineeringPhotochemistryNanomaterialsNanotechnologyMetal NanoparticlesInorganic PhotochemistryHost-sensitized LuminescenceColloidal NanocrystalsPhoto-electrochemical CellTio2 BandgapChemistryLuminescence PropertyNanocrystalline MaterialFunctional Materials
A sol−gel solvothermal method was introduced to incorporate Nd3+ and Sm3+ ions into TiO2 nanoparticles. Intense and well-resolved emission lines from Nd3+ or Sm3+ ions were realized upon excitation above the TiO2 bandgap at room temperature. The sensitized emissions of Nd3+ or Sm3+ were found to be much more efficient than a direct excitation of lanthanide ions (Ln3+). Multiple site emissions of Nd3+ and Sm3+ were detected by means of site-selective spectroscopy at 10 K. Moreover, a possible host-to-Ln3+ sensitization mechanism was proposed.