Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1808675 | Physica B: Condensed Matter | 2016 | 6 Pages |
Abstract
A new green phosphor, La2Sr3(BO3)4): x% Tb3+ was fabricated by solution-combustion method using urea as a fuel and ammonium nitrate as an oxidizer. The phosphor was characterised using Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TGA), Differential scanning calorimetry (DSC), Energy dispersive spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy (PL. The results exhibit that La2Sr3(BO3)4): x% Tb3+ phosphor has the strongest excitation at 209Â nm with a full-width at half-maximum (FWHM) of 20Â nm, and can emit bright green light at 545Â nm under 209Â nm excitation. The optimum concentration for Tb3+ in La2Sr3(BO3)4): x% Tb3+ is 0.033Â mol%. The prominent green luminescence was due to the 5D4-7F5 transition of Tb3+ ion. Herein, the green phosphors are promising good candidates employed in tri-color lamps.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
D.V. Mlotswa, R.M. Madihlaba, L.F. Koao, M.O. Onani, F.B. Dejene,