State Key Laboratory of Chemical Resource Engineering, P.O. Box 98, Beijing University of Chemical Technology, Beijing 100029, PR China.
Dalton Trans. 2013 Oct 7;42(37):13315-8. doi: 10.1039/c3dt51652k. Epub 2013 Aug 8.
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.
采用密度梯度超速离心分离的方法研究了 Yb(3+)/Er(3+)共掺杂 NaYF4 从α相到β相的相变。结果表明，富 Y 的立方相α-NaYF4 主要呈现红色发光，而新形成的六方相β-NaYF4 则具有相对较高的 Yb 和 Er 原子比，表现出最强的绿色发光。
