Color tunability and energy transfer studies of a new Eu3+ doped langbeinite-type phosphate phosphor for lighting applications

Publication date: Available online 18 September 2019Source: Journal of Solid State ChemistryAuthor(s): Shi-Rui Zhang, Dan Zhao, Yun-Chang Fan, Zhao Ma, Ya-Li Xue, Ya-Nan LiAbstractPhosphate compounds have been widely studied in solid luminescent materials due to their variable structure types and excellent performance. In this work, we reported a new langbeinite-type phosphate, K2DyHf(PO4)3, in which the octahedral sites are mixed occupied by Dy3+ and Hf4+ ions. For further confirm the proportion of Dy/Hf, we carried out scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analysis. Meanwhile, in order to investigate the effect of Eu3+ ion doping on the luminous properties of phosphors (including Dy3+), a series of Eu3+ doped solid solutions K2Dy1-xEuxHf(PO4)3 (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0) were prepared and investigated by X-ray diffraction, IR, UV–Vis. The photoluminescence spectra were demonstrated and energy transfer mechanism between Dy3+ and Eu3+ ions were researched. The results suggest that the emiting light can be tuned from whitish, yellowish to orangish in K2Dy1-xEuxHf(PO4)3 phosphors by modulating x values.Graphical abstractThis work provided a new disordered langbeinite-type phosphate K2DyHf(PO4)3 with Dy and Hf sharing a three-axis site. Multi-color emission properties was obtained with NUV light excitation for solid solutions K2Dy1-xHf(PO4)3:xEu3+, from whitish through yellowish, and eventually to oran...

Source: Journal of Solid State Chemistry - September 19, 2019 Category: Chemistry Source Type: research