Solid State Synthesis, Structural and Up-Conversion Properties of Yb3+∕Er3+ and Yb3+∕Tm3+∕Er3+ Doped La2Ti2O7 Phosphors

Abstract

In this work, Yb3+∕Er3+ co-doped and Yb3+∕Tm3+∕Er3+ tri-doped La2Ti2O7 phosphors were synthesized by solid-state reaction method. The phases of the powders were identified using the X-Ray Diffraction (XRD) technique. The purity of the La2Ti2O7 phosphors were tested by energy dispersive spectroscopy (EDS). The photoluminescence properties of La2Ti2O7 phosphors were investigated in the range of 400–850 nm wavelength under 975 nm laser excitation at room temperature. Presence of Tm3+ ion in the tri-doped powder effects the UC-emission processes observed in the powders co-doped with Yb3+∕Er3+.