Abstract
Eight single crystals of CaxSr1-xF2: Sm, Gd solid state solutions were grown by modified temperature gradient technique. Their spectroscopic properties were studied at 300 K and 77 K. The absorption spectra at room and LN2 temperatures suggest that there are more types of clusters in CaF2 rather than SrF2 samples (when the Sm3+ concentration is kept below 0.1 at.%). The addition of Gd3+ does not alter Sm2+/Sm3+ ratio significantly. Co-doping of samples with Gd3+ lead to significant changes in absorption and, emission and luminescence kinetic characteristics of Sm3+ ions. Changes in luminescent properties are due to creation of SmxGdyFz clusters. Presence of Clusters can also be confirmed by effective Energy Transfer from Gd3+ to Sm3+ ions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
