稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
9期
802-805
,共4页
叶杨森%江志浩%王棋正%朱子疏%王潇%随志磊%代如成%王中平%张增明%丁泽军
葉楊森%江誌浩%王棋正%硃子疏%王瀟%隨誌磊%代如成%王中平%張增明%丁澤軍
협양삼%강지호%왕기정%주자소%왕소%수지뢰%대여성%왕중평%장증명%정택군
upconversion luminescence%nanocrystals%NaYF4 Yb,Er%rare earths
The NaYF4:Yb,Er nanocrystals were synthesized via the thermal decomposition of metal oleate precursors. The nanocrys-tals in hexagonal structure were highly uniform and in size of 25 nm. The bright upconversion luminescence was observed under the excitation of 980 nm laser and the upconversion emission spectra were investigated at different pump powers. The emission intensity ratio of red light to green light linearly increased with pump power increasing. This result indicated that there existed a large threshold power of saturation pump for the first excitation state in NaYF4:Yb,Er nanocrystals comparing to that in bulk material.
