Synthesis and Photoluminescence Properties of Ca5(PO4)3F: Ln (Ln: Dy3+, Eu3+ and Sm3+) Phosphors for near UV-based solid state lighting

The wet chemical synthesis of Ca-5(PO4)(2)F host with lanthanide doped Dy3+, Eu3+ and Sm3+ was reported. The X-ray diffraction (XRD), structural and photoluminescence characteristics of phosphors were thoroughly investigated. The hexagonal system with the space group P 63/m ( 176) was verified by X-ray powder diffraction. Under UV excitation (352 nm), Ca-5(PO4)(2)F:Dy3+ emits 481 nm (blue) and 575 nm (yellow), corresponding to F-4(9/2)-> H-6(15/2) ( magnetic dipole) and F-4(9/2)-> H-6(13/2) ( electric dipole) transitions, respectively. When Ca-5(PO4)(2)F:Eu3+ phosphor was excited at 394 nm, the emission spectra showed strong bands at 591 nm (orange) and 614 nm (red). When excited at 403 nm, the emission spectra of Sm3+ activated Ca-5(PO4)(2)F phosphor displayed emission peaks at 565 nm (yellow) and 599 nm (orange), respectively. The research analyses the photoluminescence characteristics of Ca-5(PO4)(3)F: Ln (Ln: Dy3+, Eu3+ and Sm3+) as a possible material for near UV-based solid-state lighting.

Automated summary

The wet chemical synthesis of Ca-5(PO4)(2)F host doped with lanthanide ions Dy3+, Eu3+ and Sm3+ was investigated. The structural and photoluminescence properties were studied, and the results showed that these phosphors can emit different colors of light under different excitation wavelengths, making them potential materials for near UV-based solid-state lighting.