Fuel combustion synthesis and upconversion properties of Yb3+ and Er3+ dual-doped ZrO2 nanocrystals

摘要

Ytterbia and erbia dual-doped zirconia (ZrO2: Yb3+, Er3+) nanophosphors were successfully synthesized by high-temperature fuel combustion at 1000 ℃ for 2 h. The effects of dopant concentration on the structure and upconversion properties were investigated by X-ray diffraction, transmission electron microscopy and photoluminescence, respectively. XRD patterns indicate that the main phase of products belongs to cubic ZrO2 fluorite-type structure. TEM results show that different fuels have great influence on the morphologies of dual-doped ZrO2 samples. Under 980 nm excitation, the glycine-calcined nanophosphors show high stimulated luminescence and doped-ion concentration-depended intensities. The intensely red upconversion emissions are attributed to the fact that the dual-doped Yb3+ and Er3+ ions result in the non-radiative relaxation, energy migration, and cross relaxation.