Yb^(3+)/Nd^(3+)掺杂对Sr_(9)Ga(PO_(4))_(7)∶Cr^(3+)发光性能的影响

Effect of Yb^(3+)/Nd^(3+)Doped on Luminescent Properties of Sr_(9)Ga(PO_(4))_(7)∶Cr^(3+)

近红外荧光粉由于其独特的物理特性和广阔的应用前景吸引了人们极大的研究兴趣。本文通过高温固相反应法合成Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+)近红外荧光粉,使用460 nm蓝光激发样品的发射波长位于833 nm,半峰宽为117 nm。随后引入稀土离子合成Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),Yb^(3+)和Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),Nd^(3+)近红外荧光粉。相比Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),460 nm蓝光激发的Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),Yb^(3+)同时出现Cr^(3+)和Yb^(3+)特征发射峰,经过光谱分析和荧光寿命变化证明Cr^(3+)-Yb^(3+)存在能量传递通道,最高使Cr^(3+)-Yb^(3+)能量传递效率达80.2%,得益于Yb^(3+)卓越的热稳定性促使整体荧光光谱热稳定性提高约3.7倍。设计合成的Sr_(9)Ga(PO_(4))_7∶0.8Cr^(3+),Nd^(3+)样品调制出833,876,1 060 nm的多峰发射,显著拓宽了近红外光谱范围。最终,讨论了荧光粉在温度传感和无损检测领域的应用,证明该系列荧光粉具有广阔的应用前景。

Near-infrared phosphors have garnered significant research attention due to their unique physical properties and broad application prospects.In this work,we synthesize the Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+)near-infrared phosphors through high-temperature solid phase reaction.The Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+)emitted light at a wavelength of 833 nm with a full width at half maximum of 117 nm excited by blue light at 460 nm.Rare-earth ions were also incorporated into the Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),Yb^(3+)and Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),Nd^(3+).The Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+)was compared with Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),Yb^(3+)which emits characteristic peaks of Cr^(3+)and Yb^(3+)when excited by 460 nm blue light.Spectroscopic analysis and decay curves changes confirm the existence of a Cr^(3+)-Yb^(3+)energy transfer channel with a maximum energy transfer efficiency of 80.2%.The thermal stability of Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),Yb^(3+)has improved the overall fluorescence spectrum by about 3.7 times due to the excellent thermal stability of Yb^(3+).Sr_(9)Ga(PO_(4))_(7)∶0.8Cr^(3+),Nd^(3+)samples were designed and synthesized to show the multi-peak emission at 833,876,1060 nm.Finally,we discuss the potential applications of these phosphors in temperature sensing and nondestructive testing,demonstrating their exciting application prospects.