PREPARATION OF ZnO:Tm, Gd AND ITS FLUORESCENCE PROPERTIES

ZnO:Tm, Gd materials with high quality blue light emissions were successfully prepared using the chemical co-precipitation method. The surface morphology, composition, crystal structure and fluorescence properties were investigated using the thermogravimetric analysis/differential thermal analysis (TG/DTA), scanning electronic microscopy (SEM), X-ray diffraction (XRD), and photoluminescence (PL). The results showed that the lowest sintering temperature was 580°C; the optimal sintering temperature was 900°C; ZnO:Tm3+, Gd3+ had two emission peaks: 1D2→3H4 and 1G4→3H6; the optimal heat preservation time was 3 h; the proportion of matrix and doping elements was 100:2; and the optimal proportion of Tm and Gd was 3:2.