Preparation and Photoluminescence Properties of Ti-Doped Lu2O3 Powder

A series of Lu2O3:Ti powders was prepared via a co-precipitation route. With the help of X-ray diffraction analysis (XRD), the phase transition temperature of 773 K is confirmed for the powders. It is difficult to reduce the Ti4+ ions in the powders to Ti3+ ions in H2 atmosphere even if the calcination temperature reaches 773 K, which is verified by measurements of X-ray photoelectron spectroscopy and electron paramagnetic resonance spectroscopy. The Lu2O3:Ti powders calcined in H2 demonstrate an ability to emit white light under UV light excitation. The spectral analysis of photoluminescence and photoluminescence excitation reveals that the luminescence emission originates from the clusters (Ti4+–F–VLu′ ′ ′, etc.). The results show t hat Ti4+ ion and F center are noteworthy luminescent centers in developing luminescent materials.