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首页> 外文期刊>RSC Advances >Dual-enhancement of photoluminescence and cathodoluminescence in Eu3+-activated SrMoO4 phosphors by Na+ doping
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Dual-enhancement of photoluminescence and cathodoluminescence in Eu3+-activated SrMoO4 phosphors by Na+ doping

机译：Na +掺杂对Eu3 +活化SrMoO4荧光粉的光致发光和阴极发光双重增强

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摘要

Eu3+-activated and Eu3+/Na+-coactivated SrMoO4 phosphors were prepared by a conventional high-temperature solid-state reaction method. The characteristic properties of the as-prepared phosphors were investigated by photoluminescence (PL) and cathodoluminescence (CL) spectra, together with PL decay curves, as well as X-ray diffraction (XRD) patterns. The XRD results confirmed that all the samples exhibited a pure tetragonal phase. Under 290 nm excitation, the PL emission intensity of the Eu3+-activated SrMoO4 phosphors was increased by increasing the Eu3+ ion concentration, indicating an optimal concentration of 7 mol%. As a charge compensator, Na+ ions were incorporated into the SrMoO4:7 mol% Eu3+ (i.e., 0.07Eu(3+)) phosphor and the PL emission intensity increased gradually with the increment of Na+ ion concentration, which reaches its maximum value at 7 mol%. Furthermore, the color purity of the Sr0.86MoO4:0.07Eu(3+)/0.07Na(+) phosphor was as high as 92.1% and its Commission Internationale de I'Eclairage chromaticity coordinate was very close to that of standard red light. Ultimately, under low-voltage electron beam excitation, strong CL properties were observed in the Sr0.86MoO4:0.07Eu(3+)/0.07Na(+) phosphor.
机译：通过常规的高温固态反应方法制备了Eu3 +活化的Eu3 + / Na +共活化的SrMoO4荧光粉。通过光致发光（PL）和阴极发光（CL）光谱，以及PL衰减曲线以及X射线衍射（XRD）图案，研究了所制备磷光体的特性。 XRD结果证实所有样品均显示纯四方相。在290 nm激发下，Eu3 +活化的SrMoO4荧光粉的PL发射强度通过增加Eu3 +离子浓度而增加，表明最佳浓度为7 mol％。作为电荷补偿剂，将Na +离子掺入SrMoO4：7 mol％Eu3 +（即0.07Eu（3+））荧光粉中，PL的发射强度随着Na +离子浓度的增加而逐渐增加，在7时达到最大值摩尔％。此外，Sr0.86MoO4：0.07Eu（3 +）/ 0.07Na（+）荧光粉的色纯度高达92.1％，其国际照明委员会的色度坐标非常接近标准红光。最终，在低压电子束激发下，在Sr0.86MoO4：0.07Eu（3 +）/ 0.07Na（+）荧光粉中观察到强CL特性。

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