Separation and phase transition investigation of Yb3+/Er3+ co-doped NaYF4 nanoparticles
Sha Song1, Yun Kuang, Junfeng Liu
1State Key Laboratory of Chemical Resource Engineering, P.O. Box 98, Beijing University of Chemical Technology, Beijing 100029, PR China.
Dalton Transactions (Cambridge, England : 2003)
|August 10, 2013
Abstract:
Density gradient ultracentrifuge separation was employed to study the phase transition of Yb(3+)/Er(3+) co-doped NaYF4 from α-phase to β-phase. It was found that the cubic α-phased NaYF4 was rich in Y, exhibited predominantly red luminescence, whilst the newly formed hexagonal β-phased NaYF4 had relatively higher Yb and Er atomic ratios, exhibited green luminescence most strongly.

