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首页> 外文期刊>Optics & Laser Technology >Photoluminescence enhancement of Ca3Sr3(VO4)(4):Eu3+,Al3+ red-emitting phosphors by charge compensation
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Photoluminescence enhancement of Ca3Sr3(VO4)(4):Eu3+,Al3+ red-emitting phosphors by charge compensation

机译：CA3SR3（VO4）（4）（4）的光致发光增强：EU3 +，Al3 +红发磷光体通过电荷补偿

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In this study, Ca3Sr3(VO4)(4):0.05Eu(3+), Ca3Sr3(VO4)(4):0.05Eu(3+),xAl(3+), and Ca3Sr3(VO4)(4):0.05Eu(3+),0.06Al(3+), yM(+) (M = Li, Na, and K) red-emitting phosphors were synthesized by a citric acid-assisted sol combustion method. For the photoluminescence properties and crystal structure characterization of the prepared powder samples, the X-ray diffraction (XRD), photoluminescence (PL) spectroscopy and scanning electron microscopy (SEM) were used. The powder XRD analysis illustrated that the low content of doped Al3+ ions and charge compensators did not have a significant effect on the crystal structure of the prepared samples, and the samples still retained the rhombohedral crystal structure. The SEM images indicated that the charge compensator-doped samples were well crystallized, with a homogeneous particle size distribution. The PL studies revealed that the luminescence intensity was significantly improved by doping Al3+ into Ca3Sr3(VO4)(4):Eu3+. The emission intensity of Ca3Sr3(VO4)(4):0.05Eu(3+),0.06Al(3+) was nearly doubled upon co-doping with the charge compensator M+ (M = Li, Na, and K); the optimal concentration of the charge compensator was 12%. In particular, the maximum emission intensity and particle size were observed when Li+ was co-doped. In addition, the emission intensity of Ca3Sr3(VO4)(4):0.05Eu(3+),0.06Al(3+),0.12Li(+) is about 2.08 times higher than that of Ca3Sr3(VO4)(4):0.05Eu(3+),0.06Al(3+). Its color purity is as high as 95% and the external quantum efficiency is 57.77%. The Ca3Sr3(VO4)(4):Eu3+,Al3+,Li+ system provides potential red phosphors for near-ultraviolet excitation applied in white light-emitting diodes (LEDs).
机译：在本研究中，CA3SR3（VO4）（4）：0.05EU（3+），CA3SR3（VO4）（4）：0.05EU（3 +），XAL（3+）和CA3SR3（VO4）（4）：0.05 Eu（3 +），0.06Al（3+），Ym（+）（M = Li，Na和K）通过柠檬酸辅助溶胶燃烧方法合成红发磷光体。对于所制备的粉末样品的光致发光性和晶体结构表征，使用X射线衍射（XRD），光致发光（PL）光谱和扫描电子显微镜（SEM）。粉末XRD分析说明掺杂Al3 +离子和电荷补偿器的低含量对制备样品的晶体结构没有显着影响，并且样品仍然保留了菱形晶体结构。 SEM图像表明电荷补偿器掺杂样品均匀结晶，具有均匀的粒度分布。 PL研究表明，通过将Al3 +掺入Ca3SR3（VO4）（4）（4）：Eu3 +，通过掺杂Al3 +显着改善发光强度。 CA3SR3（VO4）（4）：0.05EU（3 +），0.06Al（3+）的发射强度在共掺杂时几乎加倍，电荷补偿器M +（M = Li，Na和K）;电荷补偿器的最佳浓度为12％。特别地，当Li +共掺杂时，观察到最大发射强度和粒度。此外，CA3SR3（VO4）（4）（4）：0.05（3 +），0.06Al（3 +），0.12li（+）的发射强度约为比CA3SR3（VO4）（4）的约2.08倍： 0.05EU（3 +），0.06Al（3+）。其颜色纯度高达95％，外部量子效率为57.77％。 CA3SR3（VO4）（4）：Eu3 +，Al3 +，Li +系统提供用于近紫外激发的潜在的红色磷光体，适用于白色发光二极管（LED）。

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