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Cathodoluminescence properties of La2MoO6:Ln3+ (Ln: Eu, Dy, and Sm) phosphors
Applied Radiation and Isotopes ( IF 1.6 ) Pub Date : 2020-09-20 , DOI: 10.1016/j.apradiso.2020.109434
M. Ayvacikli , Ümit H. Kaynar , Y. Karabulut , J. Garcia Guinea , K. Bulcar , N. Can

La2MoO6 orange-red phosphors with high efficiency incorporated with Eu, Dy and Sm have been synthesized through a gel combustion method. The influences of rare earth doping in synthesized samples were analysed by X-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and cathodoluminescence. Rare earth doped La2MoO6 samples show strong emission bands in the range of 400–750 nm and optimal doping concentration for all samples was 2 mol%. La2MoO6 host doped Eu ion showed intense and predominant emission peaks in 450–750 nm range. The electrical multipolar interaction contributed to the non-radiative energy transfer between Eu3+ ions in La2MoO6 host matrix. Sm doped La2MoO6 host exhibited orange-red CL emission peaks at 564, 608, 652 and 708 nm La2MoO6:Dy3+ phosphor displayed emissions at 484, 574 and 670 nm, respectively. The observed intense and sharp emission peaks indicate that La2MoO6 is promising host for lanthanides doped phosphor materials in the applications of optoelectronic.



中文翻译:

La 2 MoO 6:Ln 3+(Ln:Eu,Dy和Sm)荧光粉的阴极发光特性

通过凝胶燃烧法合成了掺有Eu,Dy和Sm的高效La 2 MoO 6橙红色荧光粉。通过X射线衍射(XRD),扫描电子显微镜-能量色散谱(SEM-EDS)和阴极发光分析了稀土掺杂对合成样品的影响。稀土掺杂的La 2 MoO 6样品在400–750 nm范围内显示出强发射带,所有样品的最佳掺杂浓度为2 mol%。La 2 MoO 6主体掺杂的Eu离子在450–750 nm范围内显示出强烈且主要的发射峰。多极电相互作用有助于Eu 3+之间的非辐射能量转移La 2 MoO 6基质中的离子。Sm掺杂的La 2 MoO 6主体在564、608、652、708和708 nm处显示橙红色CL发射峰La 2 MoO 6:Dy 3+荧光粉分别在484、574和670 nm处显示发射。观察到的强烈而尖锐的发射峰表明,La 2 MoO 6在光电子应用中有望成为掺杂镧系元素的磷光体材料的宿主。

更新日期:2020-09-23
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