固态照明器件用NaCd(1−x) SO4F: XEu2+卤代硫酸盐荧光粉的蓝绿色发光

IF 0.2 Q4 PHYSICS, MULTIDISCIPLINARY
S.T. Taide , N.B. Ingle , S.K. Omanwar
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引用次数: 1

摘要

采用再结晶法合成了一系列新的发绿蓝色卤代硫酸盐荧光粉NaCd(1−x)SO4F: xEu2+ (x = 1,3,5,7 mol%),并用x射线粉末衍射(XRD)技术对其相形成进行了表征。傅里叶变换红外光谱(FTIR)表征和扫描电镜分析也进行了研究,以探索各种拉伸带的存在和颗粒形态的研究。光致发光(PL)结果表明,该荧光粉在波长为200 ~ 400 nm的紫外光下被激发,在波长为280 nm的紫外光下发射出明亮的绿蓝色。发射光谱显示出以500 nm为中心的单一宽带,对应于Eu2+的4f65d1→4f7跃迁。nadso4f:Eu2+中Eu2+浓度相关的PL表明Eu2+离子存在偶极-偶极相互作用。临界传递距离约为15.51 Å。在280 nm激发下的NaCdSO4F:Eu2+卤代硫酸盐荧光粉非常适合在固态照明器件中的紫外应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Greenish blue luminescence in NaCd(1−x) SO4F: XEu2+ halosulphate phosphor for solid state lightening devices

A series of new greenish blue emitting halosulphate phosphors NaCd(1x)SO4F: xEu2+ (x = 1,3,5,7 mol%) was synthesized by re-crystallization method and its phase formation was confirmed by using the x-ray powder diffraction (XRD) technique. Fourier transform infrared spectroscopy (FTIR) characterizations and SEM analysis have also been investigated to explore the existence of various stretching bands and study of particle morphology. The photoluminescence (PL) results showed that the phosphor was excited by ultraviolet (UV) light at the wavelength of 200–400 nm, and it exhibited bright greenish blue emission under 280 nm UV light. The emission spectrum showed that a single broad band centered at 500 nm, corresponding to the 4f65d14f7 transition of Eu2+. The Eu2+ concentration dependent PL in NaCdSO4F:Eu2+ indicated that there was dipole–dipole interaction of Eu2+ ions. The critical transfer distance was around 15.51 Å. The NaCdSO4F:Eu2+ halosulphate phosphor under 280 nm excitation is very suitable for UV applications in solid state lightening devices.

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