Abstract
Eu2+, Sm3+, Ce3+ co-doped single-phased tunable color conversion phosphor for W-LED was prepared by high-temperature melting under reducing atmosphere. X-ray diffraction and photoluminescence spectra were utilized to characterize the structural and luminescence properties of the as-synthesized phosphors. A strategy of Sm3+ doping was used with the aim of providing red color luminescence, with several sharp emission peaks appearing at 567, 603, 651, and 715 nm ascribed to the 4f–4f transitions of Sm3+. as well as a broad band from 420 to 580 nm due to the spectra overlap between the emission band of Ce3+ and Eu2+, corresponding to the 5d–4f transition of Eu2+ and 5d–4f transition of Ce3+. The luminescence properties of the phosphor with different molar ratios of Eu2+/Ce3+/Sm3+ were studied, and the corresponding chromaticity coordinates were calculated. The ultraviolet light-emitting diode (UV-LED)-excitable phosphors emitting white light were obtained by tuning the relative emission intensities of Eu2+, Ce3+, and Sm3+. The results indicate that the Eu2+/Ce3+/Sm3+ co-doped Ca6BaP4O17 phosphor can be used as a potential matrix material for white LED under UV-LED.
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