Dai Yannan, Yang Shuai, Shan Yongkui, Duan Chun-Gang, Peng Hui, Yang Fan, Zhao Qingbiao
School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Optoelectronics, East China Normal University, Shanghai 200241, China.
Materials (Basel). 2019 Jan 31;12(3):431. doi: 10.3390/ma12030431.
A series of Dy ion doped Sr₂CaWO₆ phosphors with double perovskite structure were synthesized by traditional high temperature solid-state method. It was found that there is significant energy transfer between Dy and the host lattice, and the intensities of emission peaks at 449 nm (blue), 499 nm (cyan), 599 nm (orange), 670 nm (red), and 766 nm (infra-red) can be changed by adjusting the concentration of dopant amount of Dy ion in Sr₂CaWO₆. The correlated color temperature of Dy ion doped Sr₂CaWO₆ phosphors can be tuned by adjusting the concentration of Dy ion. Upon optimal doping at 1.00 mol% Dy, white light with chromaticity coordinate (0.34, 0.33) was emitted under excitation at 310 nm. Thus, single composition white emission is realized in Dy doped Sr₂CaWO₆.
采用传统高温固相法合成了一系列具有双钙钛矿结构的Dy离子掺杂Sr₂CaWO₆荧光粉。研究发现Dy与基质晶格之间存在显著的能量转移，通过调节Sr₂CaWO₆中Dy离子的掺杂量浓度，可以改变449nm（蓝色）、499nm（青色）、599nm（橙色）、670nm（红色）和766nm（红外）发射峰的强度。通过调节Dy离子浓度，可以调控Dy离子掺杂Sr₂CaWO₆荧光粉的相关色温。在1.00mol%Dy的最佳掺杂量下，在310nm激发下发射出色度坐标为(0.34, 0.33)的白光。因此，在Dy掺杂的Sr₂CaWO₆中实现了单一成分的白色发射。
