Abstract
The excitation and emission spectra of Eu2+ ions are dependent on the host environment in which it is doped. This is because the spectra arise from the inter-band transitions between the 4f and 5d orbitals and the electrons transiting between these two orbitals interact with the phonons in the host lattice. In the present work, low temperature solution combustion method was employed for the preparation of Eu2+ activated BaSiF6 phosphor by using urea as a fuel. The structure, vibrations and morphology of the samples were analyzed by X-ray Diffraction (XRD), and Scanning Electron Microscope (SEM) which showed that the samples were crystallized in a well known structure. Elemental composition of the given phosphor was confirmed by EDX analysis. The photoluminescence (PL) excitation and emission spectra were recorded for all the samples and the optimum photoluminescence (PL) intensity was obtained for the 0.5 mol% sample. Electron-vibrational interaction parameters were evaluated using a spectrum-fitting method. The expected parameters are found to be satisfactory which is evident from the good agreement between the experimental and simulated emission bands. The International Commission on Illumination chromaticity coordinates was located in the blue region, indicating the possibility of employing this phosphor as a blue-emitting component in Ultraviolet-pumped light emitting diode.
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