Preparation and White Light Emission in Dy3+/Tb3+ Codoped Glass Ceramics Containing NaYF4 Nanocrystals
Preparation and White Light Emission in Dy3+/Tb3+ Codoped Glass Ceramics Containing NaYF4 Nanocrystals
复制标题
含NaYF4纳米晶Dy3/Tb3共掺杂微晶玻璃的制备及白光发射
DOI：
10.1166/nnl.2017.2315
复制
发表时间：
2017
影响因子：
--
通讯作者：
Xu Shiqing
中科院分区：
文献类型：
--
作者：
Zhao Shilong;Tong Rui;Sun Xiao;Wu Ting;Huang Lihui;Xu Shiqing
Dy3+/Tb3+ codoped oxyfluoride aluminosilicate glass ceramics containing α-NaYF4 nanocrystals were prepared by high temperature melt-quenching and subsequent thermal treatment method. The formation of α-NaYF4 nanocrystals were verified by XRD measurement. TEM micrograph demonstrated that spherical crystallites sized 20–30 nm distributed homogeneously among the glass matrix and EDX spectra indicated that Dy3+ ions was incorporated into the precipitated α-NaYF4 nanocrystals. Intense emission bands centered at 480 nm and 571 nm were observed in the Dy3+-doped precursor glass and glass ceramics and the intensity ratio of the yellow-to-blue emissions changed greatly. In the Dy3+, Tb3+ codoped glass ceramics, besides the emission bands from Dy3+ ions, strong green bands at the 540 nm, weak blue emission band at 485 nm and red emission at 615 nm of Tb3+ ions are simultaneously observed. The glass ceramic generates intense white light emission, indicative of their potential applications as the luminescent host for W-LEDs.
