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首页> 外文期刊>RSC Advances >Crystal structure and luminescence properties of a novel single-phase orange-red emitting phosphor Ca9La (PO4)7:Sm3+
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Crystal structure and luminescence properties of a novel single-phase orange-red emitting phosphor Ca9La (PO4)7:Sm3+

机译：新型单相橙红色发射荧光粉Ca9La（PO4）7：Sm3 +的晶体结构和发光特性

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摘要

Ca _(9) La _(1? x ) (PO _(4) ) _(7) : x Sm ~(3+) phosphors (0.01 < x < 0.25) were synthesized via high temperature solid-state reaction. Their properties including crystal structure, decay performance, thermal stability and photoluminescence were examined in detail. Phase analysis indicated that the phosphors crystallized in a rhombohedral structure, and the emission spectra of the phosphors consisted of four peaks centered around 570, 607, 653, and 714 nm, attributed to Sm ~(3+) ions transitions ~(4) G _(5/2) → ~(6) H _(J) ( J = 5/2, 7/2, 9/2, and 11/2, respectively). The optimal Sm ~(3+) doping content was 0.12 mol and the Ca _(9) La(PO _(4) ) _(7) :Sm ~(3+) phosphor also exhibited better thermal stability compared to other phosphors. In addition, the mechanism behind the energy transfer between Sm ~(3+) ions was determined to be dipole–dipole interactions as described by Dexter theory. The results indicated that as orange-red phosphors, Ca _(9) La (PO _(4) ) _(7) :Sm ~(3+) phosphors were promising candidates for being integrated into white light emitting diodes.
机译：Ca _（9）La _（1→x）（PO _（4）__7）：通过高温固相反应合成了x Sm〜（3+）磷光体（0.01

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