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Synthesis and luminescence characteristic of whitlockite-type AgCa10 (PO4)7:RE3+ (RE = Sm, Dy) phosphors
Optics & Laser Technology ( IF 5 ) Pub Date : 2019-12-30 , DOI: 10.1016/j.optlastec.2019.106042
Yongchun Hou , Wenbo Chen , Jihong Xia , Bitao Liu , Lingling Peng , Jun Wang , Qinping Qiang

A series of whitlockite-type AgCa10(PO4)7:RE3+ (RE = Sm, Dy) phosphors were successfully prepared via a high-temperature solid-state reaction method. The phase purity, photoluminescent properties, and thermal stability have been discussed in detail. Under 404 nm excitation, AgCa10(PO4)7:Sm3+ exhibits red emission (604 nm) corresponding to the 4G5/2 → 6H7/2 transition. Under 352 nm excitation, AgCa10(PO4)7:Dy3+ exhibits two emission peaks at 480 and 574 nm correspond to the 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 transition, respectively. The optimal AgCa10(PO4)7:Sm3+ and AgCa10(PO4)7:Dy3+ phosphors show good thermal stability. When the heating temperature reached 423 K, the relative intensity remains 90% and 86% compared to the luminescence intensity at room temperature of 298 K, respectively. Therefore, the above results indicate AgCa10(PO4)7:RE3+ (RE = Sm, Dy) phosphors have potential applications in LEDs and display devices.



中文翻译:

辉锰矿型AgCa 10(PO 47:RE 3+(RE = Sm,Dy)荧光粉的合成和发光特性

通过高温固相反应法成功地制备了一系列辉锰矿型AgCa 10(PO 47:RE 3+(RE = Sm,Dy)荧光粉。已经详细讨论了相纯度,光致发光性质和热稳定性。在404 nm激发下,AgCa 10(PO 47:Sm 3+表现出与4 G 5/2  →  6 H 7/2跃迁相对应的红色发射(604 nm)。在352 nm激发下,AgCa 10(PO 47:Dy 3+呈现在480 2个发射峰和574nm的对应于4 ˚F 9/2  →  6 ħ 15/24 ˚F 9/2  →  6 ħ 13/2分别过渡。最佳的AgCa 10(PO 47:Sm 3+和AgCa 10(PO 47:Dy 3+荧光粉显示出良好的热稳定性。当加热温度达到423 K时,相对强度分别比室温下298 K的发光强度高90%和86%。因此,以上结果表明AgCa10(PO 47:RE 3+(RE = Sm,Dy)磷光体在LED和显示设备中具有潜在的应用。

更新日期:2019-12-30
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