Colour Emission Behaviour of Ce-Doped YAG-Based Luminescent Materials

Abstract

Cerium-doped yttrium aluminium garnet (Ce3+: YAG) nanopowders have been produced through the sol-gel method using ammonium solution. The spherical nature of YAG with secondary YAM was observed at 1000 °C and 1200 °C, whereas pure phase of YAG was obtained at 1400 °C. The photoluminescence spectra exhibit intense broad green–yellow emission band in the range of 460– 660 nm with a maximum intensity at around 530 nm assigned to the 5d→4f (2F5/2, 2F7/2) transitions of Ce3+ ion in YAG. The tunable colour i.e., bluish-white, greenish-white, yellowish-white, and near white of the calcined samples at an excitation wavelength of 254 nm and 365 nm confirmed the potential of the prepared materials in different luminescence fields.