Dual Mode Photoluminescence Studies of Polyol-mediated Ho3+ Doped CePO4.

In this work, CePO4:Ho3+ nanomaterials are prepared by a productive polyol method which shows the dual mode of behavior in Photoluminescence. The up-conversion spectra at 980nm excitation display a sharp brilliant peak at ~520nm-~550nm, ~630nm, -670nm resulting in the (5F4, 5S2-5I8) and (5F5-5I8) of Ho3+ ions, and it is also found that the sample radiates green and red colors. The down-conversion peaks show maximum absorption at 300nm which exhibit peaks at ~450nm, ~520nm-~550nm, and 630nm-~670nm respectively. The rare earth ions doped nanomaterials show up-conversion radiation and down-conversion radiation. This type of energetic work has an extensive range of applications, including lasers, metal ion sensors, bio-imaging, temperature and stress sensors, radiation damage sensors, and defense and cyber security. [ABSTRACT FROM AUTHOR]