Green, orange and reddish color emitting rare earth activated Ca2BO3Cl phosphor for solid state lighting applications

In this paper we report the combustion synthesis of trivalent rare-earth (RE3+ = Tb and Eu) activated Ca2BO3Cl phosphor. The prepared phosphors were characterized by the X-ray powder diffraction (XRD) and CIE and PL and TL techniques. Photoluminescence emission peaks of Ca2BO3Cl:Tb3+ phosphor at 546 nm in the green region of the spectrum excited by 352 nm. The prepared Eu3+ doped phosphors were excited by 396 nm then we found that the characteristics emission of europium ions at 594 nm (5D0 → 7F1) and 620 nm (5D0 → 7F2). The chromaticity coordinates for the prepared compound is found to be Cx = 0.272, Cy = 0.716 for Tb3+ and Cx = 0.592, Cy = 0.406, Cx = 0.686, Cy = 0.307 for Eu3+ ions estimated from the emission spectra of prepared sample with both activators. In present study the trapping parameters such as order of kinetics(b), activation energy(E) and frequency factors(s) have been calculated for the glow peaks of Ca2BO3Cl:Tb3+ by using Chen’s method.