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The Photoluminescent Properties of Y<SUB>2</SUB>O<SUB>3</SUB>:Bi<SUP>3+</SUP>, Eu<SUP>3+</SUP>, Dy<SUP>3+</SUP> Phosphors for White-Light-Emitting Diodes
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2014
Year
Optical MaterialsEngineeringLuminescent GlassPhotoluminescent PropertiesChemistryLuminescence PropertyY2o3 PhosphorsPhosphorescence ImagingOptical PropertiesWhite-light-emitting DiodesMaterials SciencePhotonicsPhotoluminescencePhysicsPhotochemistryNew Lighting TechnologyUpconversion LuminescenceCrystallographyRefined Crystal StructureSolid-state LightingNatural SciencesX-ray DiffractionApplied PhysicsOptoelectronicsPhosphorescence
Bi3+, Eu3+, Dy3+ activated Y2O3 phosphors were prepared through the sol-gel process. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, and photoluminescence (PL) spectra were used to characterize the resulting phosphors. The XRD patterns show the refined crystal structure of Y2O3. The energy transfer processes of Bi(3+)-Eu3+ occurred in the host lattices. The thermal stability of Y2O3:Bi3+, Eu3+, Dy3+ phosphors was studied. Under short wavelength UV excitation, the phosphors show excellent characteristic red, blue, and yellow emission with medium intensity.