Luminescence Tuning of Sr8MgCe(PO4)7:Eu2+,Mn2+ Phosphors: Structure Refinement, Site Occupancy, and Energy Transfer

作者：Tang, Wanjun^*; Ding, Chong

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2018, 644(16): 893-900.

DOI：10.1002/zaac.201800078

• Doping
• Energy transfer
• Luminescence
• Solid-state reactions

Sr8MgCe(PO4)(7):Eu2+,Mn2+ phosphor with whitlockite-type structure was prepared by a combustion-assisted solid-state reaction. The crystal structure and luminescence properties were investigated. Under UV radiation, Sr8MgCe(PO4)(7) host exhibits a violet-blue emission band from Ce3+ ions. When Eu2+/Mn2+ are doped into the host, the samples excited with 270 nm UV radiation present multicolor emissions due to the energy transfer (ET) from Ce3+ to Eu2+/Mn2+. The emitting color of Sr8MgCe(PO4)(7):Eu2+ can be tuned from violet-blue to yellow-green, whereas Sr8MgCe(PO4)(7):Mn2+ can emit red light. Under excitation with long wavelength at 360 nm, Sr8MgCe(PO4)(7):Eu2+ phosphor shows a broadband emission from 390 to 700 nm, which is attributed to the 4f(6)5d(1)4f(7) transition of Eu2+ without the contribution from Ce3+ emission. Tunable full-color emitting light can be achieved in the Eu2+ and Mn2+-codoped Sr8MgCe(PO4)(7) phosphor by ETEu-Mn through control of the levels of doped Eu2+ and Mn2+ ions. These results suggest that Sr8MgCe(PO4)(7):Eu2+,Mn2+ phosphor has potential applications in NUV chip pumped white LEDs.

• 出版日期2018-8-31
• 单位中南民族大学