Luminescent properties and energy transfer of color-tunable Sr3Y2（SiO3）6：Ce3＋,Tb3＋ phosphors

• Published in: 中国稀土学报：英文版 2014, Vol.32 (10), p.933-937
• Main Author: 李乃旭 李树强 王越明 周冰瑶 孙岳明 周建成
• Format: Article
• Language: English
• Subjects: 发光颜色; 扫描电子显微镜; 白色发光二极管; 粉末X射线衍射; 能量转移; 荧光粉; 透射电子显微镜; 铽离子
• ISSN: 1002-0721; 2509-4963

Phosphors with controlled emission spectra are of great interest due to their application for white light emitting diodes.Herein, a new class of Sr3Y2（SiO3）6：Ce3＋,Tb3＋ phosphors were synthesized by a facile sol-gel combustion method. The phase structure,morphology, and luminescence properties of the phosphors were characterized by using powder X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, and photoluminescence excitation and emission spectra,respectively. The results on luminescence properties indicated that co-doped Ce3＋ ions served as UV-light sensitizers with excitation energy partially transferred to Tb3＋ ions, leading to green emission from Tb3＋. Particularly, the corresponding emitting colors of the phosphors could be well-tuned from deep blue（0.16, 0.05） to green region（0.25, 0.45） by adjusting the molar ratio of Ce3＋/Tb3＋.