Single phased Sr3La(PO4)3:Eu2+/Mn2+ phosphors: solid state synthesis, tunable luminescence and potential applications in white light LEDs

• DOI: 10.1007/s10854-017-8092-y
• Publication Date: 2017-10-25T03:35:37Z
• Authors: Mingxia Zhao; Zhiju Zhao; Lixia Yu; Liqin Yang; Junbing Jiang; Xuan Li; Guanghua Li
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

A series of Sr3La(PO4)3:Eu2+/Mn2+ phosphors were synthesized by a solid state reaction. The phase and the optical properties of the synthesized phosphors were investigated. The XRD results indicate that the doped Eu2+ and Mn2+ ions do not change the phase of Sr3La(PO4)3. The peak wavelengths of Eu2+ single doped and Eu2+/Mn2+ codoped Sr3La(PO4)3 phosphors shift to longer wavelength due to the larger crystal field splitting for Eu2+ and Mn2+. The increases of crystal field splitting for Eu2+ and Mn2+ are induced by the substitution of Sr2+ by Eu2+ and Mn2+ in Sr3La(PO4)3 host. Due to energy transfer from Eu2+ to Mn2+ in Sr3La(PO4)3:Eu2+/Mn2+ phosphors, tunable luminescence was obtained by changing the concentration of Mn2+. And the white light was emitted by Sr3La(PO4)3:3.0 mol%Eu2+/4.0 mol%Mn2+ and Sr3La(PO4)3:3.0 mol%Eu2+/5.0 mol%Mn2+ phosphors.