The Energy Transfer and Thermal Stability of a Blue-Green Color Tunable K<sub>2sub>CaP<sub>2sub>O<sub>7sub>:Ce<sup>3+sup>,Tb<sup>3+sup> Phosphor

详细信息    查看全文

• 作者：Yi Ding ; Luxiang Wang ; Mengjiao Xu ; Dianzeng Jia and Rui Zhou
• 刊名：Journal of the American Ceramic Society
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：100
• 期：1
• 页码：185-192
• 全文大小：1341K
• ISSN：1551-2916

文摘

Novel blue-green emitting Ce<sup>3+sup>- and Tb<sup>3+sup>-activated K<sub>2sub>CaP<sub>2sub>O<sub>7sub> (KCPO) luminescent materials were synthesized via a solid-state reaction method. X-ray diffraction, luminescence spectroscopy, decay time, and fluorescent thermal stability tests have been used to characterize the prepared samples. The KCPO:Ce<sup>3+sup>,Tb<sup>3+sup> luminescence spectra show broad band of Ce<sup>3+sup> ions and characteristic line of Tb<sup>3+sup> ion transition (<sup>5sup>D<sub>4sub>–<sup>7sup>F<sub>5sub>). The color variation in the light emitting from blue to green under UV excitation can be obtained by tailoring the Tb<sup>3+sup> content in KCPO:Ce<sup>3+sup>. Besides, Ce<sup>3+sup> ions obviously intensify Tb<sup>3+sup> ion emission through an effective energy transfer process, which was confirmed from decay curves. The energy transfer efficiency was determined to be 82.51%. A resonant type mechanism via the dipole–quadrupole interaction can be proposed for energy transfer. As a whole, the KCPO:Ce<sup>3+sup>,Tb<sup>3+sup> phosphor exhibits excellent performance in the range from 77 to 673 K, indicating the phosphors are highly potential candidates for solid-state lighting.