Synthesis of sharp blue emitting Gd₂O₃:Dy³⁺ nanophosphor by co-precipitation method

In this paper, we have reported the synthesizes of dysprosium (Dy³⁺) doped gadolinium oxide (Gd₂O₃) nanophosphors by the co-precipitation method. The concentration of dysprosium was varied from 1.0 mol% to 2.0 mol%. All the prepared samples were annealed at 1000 °C in the air.The synthesized sample will be characterized by X-ray diffraction (XRD), which revealed the size of Gadolinium oxide nanocrystallites. The crystallite size of Gd₂O₃:Dy³⁺ was found to lie in the range of 30-40 nm. The optical properties of the synthesized samples will be investigated by UV visible spectroscopy and photoluminescence spectroscopy. The band Gap of Gd₂O₃:Dy³⁺ is found to be 5.06 eV. From photo-luminescence studies it was found in the emission spectra of Gd₂O₃: Dy³⁺ has shown a sharp peak at around 485 nm correspond to ⁴F_9/2 -⁶H_15/2 transition of the Dy³⁺ ions at an excitation wavelength 220nm. Prepared samples Gd₂O₃:Dy³⁺ nanophosphors can be used as promising blue phosphors in many of the display devices.