Preparation and Up-Conversion Luminescence of Yb³⁺/Er³⁺/GZO Ceramics

Yb³⁺/Er³⁺/GZO ceramics have been synthesized with high temperature solid-state method. The phase and structure of the Yb³⁺/Er³⁺/GZO ceramics were characterized by X-ray diffraction (XRD). The XRD pattern that following ions Yb³⁺, Er³⁺ and Ga³⁺ were well doped into the ZnO lattice. Effi cient visible up-conversion (UC) red and green emission were observed under 980 nm excitation. The mechanism of the UC luminescence is investigated on the basis of the UC luminescence emission spectra, the power curve and energy level diagram. The infl uence of doping ions to the intensity ratio of red to green is analyzed and high purity of red light (red/green = 29.9) is fi nally obtained.