Effect of Gd, La, Lu Co-Doping on the Morphology and Luminescent Properties of NaYF:Sm Phosphors.

The series of luminescent NaYF:Sm nano- and microcrystalline materials co-doped by La, Gd, and Lu ions were synthesized by hydrothermal method using rare earth chlorides as the precursors and citric acid as a stabilizing agent. The phase composition of synthesized compounds was studied by PXRD. All synthesized materials except ones with high La content (where LaF is formed) have a β-NaYF crystalline phase.