Tb3+ ion induced colour tunability in calcium aluminozincate phosphor for lighting and display devices

Terbium (Tb3+) ions doped calcium aluminozincate (CAZ) phosphors with different concentration of Tb3+ ions (0.0-5.0 mol%) have been successfully prepared by sol-gel method. The crystal phase analysis and morphology of the as prepared phosphors have been studied from X-ray diffraction (XRD) patterns and field emission scanning electron microscope (FE-SEM) image. The luminescence behaviour of Tb3+ doped CAZ phosphors have been studied relative to variable dopant ion concentration. The intense emission has been observed at 543 nm under 238 nm excitation for all the phosphors. The decay curve analysis manifests the energy transfer as a consequence of dipole-dipole interaction between Tb3+ ions in the host. The colorimetric property has been understood on the basis of evaluated CIE color coordinates. The systematic study of Tb3+ doped CAZ phosphors determine the potential utility of these phosphors in lighting and display applications. (C) 2020 Elsevier B.V. All rights reserved.