Optical properties of Sm3+ and Dy3+ ions in Gd2MoB2O9 host lattice

Gd2MoB2O9 doped with Sm3+ and Dy3+ were used for this study. The photoluminescence behaviors of Sm3+ and Dy3+ in this phosphor material were investigated by the excitation and emission spectra. The Sm3+-doped Gd2MoB2O9 phosphor powders show a red luminescence, whereas the Dy3+-doped Gd2MoB2O9 phosphor powders show a yellow luminescence. In addition, the optimum doping concentration and the time-resolved luminescence spectroscopy were also investigated.

► Luminescence behaviors of Sm3+ and Dy3+ in Gd2MoB2O9 are investigated.
► Intense absorptions due to the f–f transitions are observed.
► The Sm3+ and Dy3+ ions exhibit red and yellow in Gd2MoB2O9, respectively.
► Optimum concentrations are 0.15 for Sm3+ and 0.30 for Dy3+.
► Decay curves are analyzed by employing the Inokuti–Hirayama model.