Blue-Green-Yellow Color-Tunable Luminescence of Ce3 -, Tb3 -, and Mn2 -Codoped Sr3YNa(PO4)(3)F via Efficient Energy Transfer
Blue-Green-Yellow Color-Tunable Luminescence of Ce3 -, Tb3 -, and Mn2 -Codoped Sr3YNa(PO4)(3)F via Efficient Energy Transfer
复制标题
Ce3 -、Tb3 - 和 Mn2 共掺杂 Sr3YNa(PO4)(3)F 通过高效能量转移实现蓝绿黄颜色可调发光
DOI：
10.1021/acs.inorgchem.9b00030
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发表时间：
2019
影响因子：
4.6
通讯作者：
Chen Baojiu
中科院分区：
文献类型：
--
作者：
Zhang Bingye;Ying Shitian;Wang Shiping;Han Lu;Zhang Jinsu;Chen Baojiu
采用高温固相反应法制备了Sr 3 YNa（PO 4）3F（SYNPF）：Ce 3+，Tb 3+，Mn 2+可调谐蓝绿黄荧光粉。对样品的结构和发光性能、能量传递机制和热猝灭进行了详细的研究。在SYNPF中，Ce ~（3+）与Tb ~（3+）和Mn ~（2+）的电子转移为电偶极-电四极相互作用，电子转移效率分别为81.6%和69.3%。通过光谱重叠法计算出Ce ~（3+）/Tb ~（3+）和Ce ~（3+）/Mn ~（2+）的临界距离分别为9.54和10.92 μ m。在紫外光激发下，Ce ~（3+）对Tb ~（3+）和Mn ~（2+）的发光可以实现蓝-绿-黄的高效可调谐。此外，还可以通过适当地调节SYNPF磷光体中Ce 3+和Mn 2+的化学计量比来实现白色光。此外，随温度变化的发光光谱表现出良好的热猝灭行为所制备的荧光粉。上述结果表明SYNPF：Ce 3+，Tb 3+，Mn 2+荧光粉可以作为颜色可调的发光荧光粉在WLED中具有潜在的应用。
Tunable blue–green–yellow emitting Sr3YNa(PO4)3F (SYNPF):Ce3+,Tb3+,Mn2+phosphors have been prepared via a high-temperature solid-state reaction method. The structural and luminescent properties, energy transfer (ET) mechanism, and thermal quenching of the samples are investigated in detail. The ET from Ce3+to Tb3+and Mn2+in SYNPF is identified as the interaction of the electric dipole–quadrupole with ET efficiencies of 81.6% and 69.3%, respectively. The critical distances for Ce3+/Tb3+and Ce3+/Mn2+are calculated through the spectral overlap method to be 9.54 and 10.92 Å. Under UV excitation, high-efficiency tunable blue–green–yellow emissions from Ce3+to Tb3+and Mn2+can be obtained. Moreover, white light can also be achieved by adjusting the stoichiometry of Ce3+and Mn2+properly in the SYNPF phosphor. In addition, the temperature-dependent luminescence spectra exhibit good thermal quenching behaviors for the as-prepared phosphors. The above results suggest that SYNPF:Ce3+,Tb3+,Mn2+phosphors can act as color-tunable emission phosphors for potential applications in WLEDs.