Abstract LiMgPO4(LMP):Tm, LMP:Tb and LMP:Tm, Tb phosphors were synthesized via a high-temperature solid-phase method, and the crystal structures of the samples were studied by X-ray diffraction (XRD). Thermoluminescence (TL) and optically stimulated luminescence (OSL) curves and TL three-dimensional (3D) spectra of the LMP phosphors doped with Tm3+ and Tb3+ were measured. The photoluminescence (PL) of the samples was also measured to study the effects of Tb3+ and Tm3+ ions on the luminescence of the material, its concentration on the luminescence properties, and the energy transfer between the two kinds of ions. The experimental results showed that in the co-doped system of LMP:Tm,Tb, the rare earth ions, Tm3+ and Tb3+, become the discrete luminescent centre, Tm3+ ions act as activators, and Tb3+ ions act as sensitizers. Upon analysing the PL lifetime of Tm3+ and Tb3+, energy transfer from Tb3+ to Tm3+ was found. According to the TL 3D spectra of LMP:Tm,Tb, the TL luminescence of Tb3+ below 200 °C was suppressed, and the TL luminescence of Tm3+ at approximately 300 °C was enhanced. This showed that the energy of the low-temperature glow peaks transferred to the 300 °C peak, meaning that the formation of shallow traps was inhibited, which is beneficial for the stability of the sample signal and improves the sensitivity of the sample to the high-temperature peak. Moreover, the TL and OSL intensities of the LMP:Tm, Tb phosphor were comparable to that of Al2O3:C; thus, it can be applied for a low-dose measurement.

中文翻译：

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Tm3+和Tb3+掺杂LiMgPO4荧光粉能量转移的光谱研究

摘要 采用高温固相法合成了LiMgPO4(LMP):Tm、LMP:Tb和LMP:Tm,Tb荧光粉，并通过X射线衍射(XRD)研究了样品的晶体结构。测量了掺杂有 Tm3+ 和 Tb3+ 的 LMP 荧光粉的热致发光 (TL) 和光学受激发光 (OSL) 曲线和 TL 三维 (3D) 光谱。还测量了样品的光致发光 (PL)，以研究 Tb3+ 和 Tm3+ 离子对材料发光的影响、其浓度对发光性能的影响以及两种离子之间的能量转移。实验结果表明，在LMP:Tm、Tb共掺杂体系中，稀土离子Tm3+和Tb3+成为离散的发光中心，Tm3+离子作为活化剂，Tb3+离子作为敏化剂。通过分析 Tm3+ 和 Tb3+ 的 PL 寿命，发现能量从 Tb3+ 转移到 Tm3+。根据LMP:Tm,Tb的TL 3D光谱，Tb3+在200℃以下的TL发光被抑制，Tm3+在300℃左右的TL发光增强。这表明低温辉光峰的能量转移到了 300 ℃的峰，意味着浅陷阱的形成受到抑制，有利于样品信号的稳定，提高了样品对高温的灵敏度。 - 温度峰值。此外，LMP:Tm、Tb 荧光粉的 TL 和 OSL 强度与 Al2O3:C 相当；因此，它可以应用于低剂量测量。Tb3+在200℃以下的TL发光受到抑制，而Tm3+在300℃左右的TL发光增强。这表明低温辉光峰的能量转移到了 300 ℃的峰，意味着浅陷阱的形成受到抑制，有利于样品信号的稳定，提高了样品对高温的灵敏度。 - 温度峰值。此外，LMP:Tm、Tb 荧光粉的 TL 和 OSL 强度与 Al2O3:C 相当；因此，它可以应用于低剂量测量。Tb3+在200℃以下的TL发光受到抑制，而Tm3+在300℃左右的TL发光增强。这表明低温辉光峰的能量转移到了 300 ℃的峰，意味着浅陷阱的形成受到抑制，有利于样品信号的稳定，提高了样品对高温的灵敏度。 - 温度峰值。此外，LMP:Tm、Tb 荧光粉的 TL 和 OSL 强度与 Al2O3:C 相当；因此，它可以应用于低剂量测量。有利于样品信号的稳定，提高样品对高温峰的灵敏度。此外，LMP:Tm、Tb 荧光粉的 TL 和 OSL 强度与 Al2O3:C 相当；因此，它可以应用于低剂量测量。有利于样品信号的稳定，提高样品对高温峰的灵敏度。此外，LMP:Tm、Tb 荧光粉的 TL 和 OSL 强度与 Al2O3:C 相当；因此，它可以应用于低剂量测量。