Yellow-Emitting Sr9Sc(PO4)7:Eu2+, Mn2+ Phosphor with Energy Transfer for Potential Application in White Light-Emitting Diodes
Yellow-Emitting Sr9Sc(PO4)7:Eu2+, Mn2+ Phosphor with Energy Transfer for Potential Application in White Light-Emitting Diodes
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DOI：
10.1002/ejic.201301216
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发表时间：
2014-02-01
影响因子：
2.3
通讯作者：
Luo, Yongshi
中科院分区：
文献类型：
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作者：
Dong, Xiaoling;Zhang, Jiahua;Luo, Yongshi
采用固相反应法合成了Eu 2 +-Mn 2+共掺杂的Sr9 Sc（PO 4）7（SSP）黄色荧光粉。对所制备的荧光粉的合成、结构优化和发光性能进行了详细的研究。所获得的磷光体在250和450 nm之间表现出强激发带，与近UV发光二极管（LED）芯片的主发射带匹配良好。在365 nm激发下，Sr9 Sc（PO 4）7：Eu 2+，Mn 2+磷光体显示出以510和610 nm为中心的强黄色发射。研究了Sr9 Sc（PO 4）7：Eu 2+，Mn 2+中Eu 2+向Mn 2+的能量转移机制，并根据衰减寿命数据证明了Eu 2+向Mn 2+的能量转移是通过偶极-四极机制的共振型。这些结果表明，黄光发射Sr9 Sc（PO 4）7：Eu 2+，Mn 2+可以作为应用于白色光LED的有希望的候选者。
Eu2+–Mn2+codoped yellow‐emitting Sr9Sc(PO4)7(SSP) phosphors have been synthesized by solid‐state reactions. The synthesis, structure refinement, and luminescence properties of the obtained phosphor were investigated in detail. The obtained phosphor exhibits a strong excitation band between 250 and 450 nm, matching well with the dominant emission band of a near‐UV light‐emitting‐diode (LED) chip. Upon excitation at 365 nm, the Sr9Sc(PO4)7:Eu2+, Mn2+phosphor shows strong yellow emissions centered at 510 and 610 nm. The energy transfer mechanism from Eu2+to Mn2+in Sr9Sc(PO4)7:Eu2+, Mn2+has been studied and demonstrated to be a resonant type through a dipole‐quadrupole mechanism based on the decay lifetime data. These results indicate that yellow‐emitting Sr9Sc(PO4)7:Eu2+, Mn2+can serve as a promising candidate for application in white‐light LEDs.