Tunable color of Tb3+/Eu3+/Tm3+-coactivated K3La(PO4)2 via energy transfer: A single-phase white-emitting phosphor
Tunable color of Tb3+/Eu3+/Tm3+-coactivated K3La(PO4)2 via energy transfer: A single-phase white-emitting phosphor
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DOI：
10.1016/j.optlastec.2019.02.021
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发表时间：
2019-07-01
影响因子：
5
通讯作者：
Ren, Yuhan
中科院分区：
文献类型：
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作者：
Wu, Xiulan;Bai, Wenni;Ren, Yuhan
采用固相反应法合成了一系列Tm 3+、Tb 3+、Eu 3+掺杂的K3 La（PO 4）（2）荧光粉。通过X射线衍射（XRD）、荧光光谱（PL）和荧光衰减曲线对化合物进行了表征。根据Inokuti-Hirayama理论模型，研究了K_3La（PO_4）（2）基质中Tb~（3+）与Eu~（3+）之间的能量传递，认为它们是通过偶极-偶极机制进行的共振型能量传递。通过调节Tb 3+、Tm 3+和Eu 3+的掺杂浓度，可以在K3La（PO 4）（2）基质中获得白色发光。计算了K_3La（PO_4）（2）：RE~（3+）（RE = Tm，Tb，Eu）荧光粉的能量转移效率和CIE坐标。此外，随温度变化的发射显示了所制备的磷光体的良好的热稳定性。所获得的性质表明，所制备的化合物可以用作WLED结构中的单组分白色发射磷光体。
A series of Tm3+, Tb3+, Eu3+ coped K3La(PO4)(2) phosphors was synthesized via solid-state reaction. The compounds were characterized by X-ray diffraction (XRD), photoluminescence (PL) spectra as well as fluorescent decay curves. The energy transfers from Tb3+ to Eu3+ in the K3La(PO4)(2) host were investigated according to the Inokuti-Hirayama theoretical model which suggests they are of the resonant type via a dipole-dipole mechanism. By adjusting the doping concentrations of Tb3+, Tm3+ and Eu3+, a white emission can be reached in the K3La(PO4)(2) host. The energy transfer efficiency and the CIE coordinates of K3La(PO4)(2):RE3+ (RE = Tm, Tb, Eu) phosphors were calculated. In addition, the temperature-dependent emission showed good thermal stability of as-prepared phosphors. The obtained properties indicated that prepared compounds can be used as a single-component white emitting phosphor in WLEDs structures.