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首页> 外文期刊>Physica, B. Condensed Matter >Photoluminescence and phosphorescence properties of MAl2O4:Eu2+, Dy3+ (M=Ca, Ba, Sr) phosphors prepared at an initiating combustion temperature of 500 degrees C
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Photoluminescence and phosphorescence properties of MAl2O4:Eu2+, Dy3+ (M=Ca, Ba, Sr) phosphors prepared at an initiating combustion temperature of 500 degrees C

机译：在500摄氏度的初始燃烧温度下制备的MAl2O4：Eu2 +，Dy3 +（M = Ca，Ba，Sr）荧光粉的光致发光和磷光性能

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摘要

Eu2+ and Dy3+ co-doped calcium aluminate, barium aluminate and strontium aluminate phosphors were synthesized at an initiating combustion temperature of 500 degrees C using urea as an organic fuel. The crystallinity of the phosphors was investigated by using X-ray diffraction (XRD) and the morphology was determined by a scanning electron microscope (SEM). The low temperature monochnic structure for both CaAl2O4 and SrAl2O4 and the hexagonal structure of BaAl2O4 were observed. The effect of the host materials on the photoluminescence (PL) and phosphorescence properties were investigated by using a He-Cd Laser and a Cary Eclipse fluorescence spectro photometer, respectively. The broad band emission spectra observed at 449 nm for CaAl2O4:Eu2+, Dy3+, 450 nm (with a shoulder-peak at 500 nm) for BaAl2O4:Eu2+, Dy3+ and 528 nm for SrAl2O4:Eu2+, Dy3+ are attributed to the 4f(6)5d(1) to 4f(7) transition in the Eu2+ ion in the different hosts.
机译：使用尿素作为有机燃料在500摄氏度的起始燃烧温度下合成了Eu2 +和Dy3 +共掺杂的铝酸钙，铝酸钡和铝酸锶荧光粉。通过使用X射线衍射（XRD）研究磷光体的结晶度，并通过扫描电子显微镜（SEM）确定形态。观察到CaAl2O4和SrAl2O4的低温单峰结构以及BaAl2O4的六方结构。分别使用He-Cd激光和Cary Eclipse荧光分光光度计研究了基质材料对光致发光（PL）和磷光性能的影响。 CaAl2O4：Eu2 +，Dy3 +在449 nm处观察到的宽带发射光谱，BaAl2O4：Eu2 +，Dy3 +在450 nm（肩峰在500 nm处的肩峰）和SrAl2O4：Eu2 +，Dy3 +在528 nm处观察到的宽带发射光谱归因于4f（6 ）5d（1）到4f（7）在不同主体中的Eu2 +离子跃迁。

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