Abstract
A series of Sr(1-x)Al2O4:xTb3+ (SAOTx; 0 ≤ x ≤ 10.0 mol%) nanophosphors were prepared by solid state reaction technique for various photonic applications. The sintering temperature was estimated to be 1050 °C to crystallize SAOT phosphors into monoclinic structure. The powder X-ray diffraction profiles were well consistent with JCPDS No. 34–0379. Upon 375 nm excitation, the SAOT phosphors displayed two groups of emission bands corresponding to 5D3 → 7FJ and 5D4 → 7FJ transitions. A quenching in luminescence was noticed beyond 5.0 mol% of Tb3+ concentration due to the transfer of energy at higher concentrations. The emission spectra of SAOTx phosphors showed an intense green luminescence through 5D4 → 7F5 (546 nm) transition. The colour purity of SAOTx phosphors was analyzed by evaluating the chromaticity coordinates. The SAOT5 phosphor could be the best choice for various photonic applications.
