Abstract
In this study, distinct concentrations of Dy3+ ions (0.04, 0.07, 0.1, 0.4 and 0.7 mol%) doped LiPbB5O9 phosphors were fabricated via solid state reaction technique. X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermo-gravimetric studies (TG-DSC) and photoluminescence characterizations were performed to LiPbB5O9:Dy3+ phosphors. Photoluminescence excitation and emission spectra were recorded at 576 nm and 349 nm, respectively. The stress, the critical distance (Rc) and energy transfer parameters (Q) between the Dy3+ ions were evaluated for all concentrations. To interpret the white light emission ability of the LiPbB5O9:Dy3+ phosphor, yellow to blue (Y/B) intensity ratios have been calculated. The decay curves of 4F9/2 level of Dy3+ions were studied. The CIE color co-ordinates and coordinate color temperatures (CCT) were also calculated. From these studies, it is mentioned that LiPbB5O9:0.4Dy3+ phosphor is a suitable material for fabrication of WLEDs and laser applications.
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