Abstract
Undoped and 2 at.% Dy3+ doped Gd2O3 nanophosphor were synthesized using chemical precipitation method. The crystallite sizes of the samples were found to be in nanometer range. The luminescent properties of the samples were studied under different excitation wavelength namely 234 nm and 278 nm. The photoluminescence emission peaks of doped samples were observed at 486 nm and 574 nm corresponding to 4F9/2-6H15/2 and 4F9/2-6H13/2 transitions respectively in both cases. The emission intensity due to 234 nm excitation wavelength was much stronger which showed the energy transfer due to host absorption was more efficient. The change in color emission of 2 at.% Dy3+ doped Gd2O3 nanophosphor under different excitation wavelength were observed from calculated CIE coordinates and CCT values.
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