Characteriztion and luminescence studies of Dysprosium Titanate by two synthesis methods

The present paper reports Phase analysis and luminescence studies of Dysprosium Titanate phosphor which was synthesized by hydrothermal and combustion methods. The synthesized samples were characterized by X-ray diffraction technique (XRD), Fourier Transmission Infrared Spectroscopy (FTIR) and Photoluminescence (PL). XRD spectra reveal that both samples of Dy₂Ti₂O₇ were highly crystalline in nature. In XRD analysis, it is observed that two different phases have been obtained and it is attributed to different synthesizing methods. FT-IR was utilized to monitor the structural changes of compounds during the preparative process. Room Temperature Photoluminescence spectra recorded at 254 nm excitation wavelength show, broad emission in UV-blue region. The exhibited peaks at 474 nm and 484 nm are attributed to the transitions ⁴F_9/2 to ⁶H_15/2 of Dy⁺³. PL emission spectra were fitted with four individual Gaussian peaks.