Structural, morphological and photoluminescence properties of β?Ag_2MoO_4 doped with Eu~(3+)

Priscila B. Almeida; Ivo M. Pinatti; Regiane C. de OliveiraMayara M. TeixeiraClayane C. SantosThales R. MachadoElson LongoIeda L. V. Rosa

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Structural, morphological and photoluminescence properties of β?Ag_2MoO_4 doped with Eu~(3+)

机译：结构、形态、光致发光β的属性?

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In this work, we report the investigation on β-Ag_((2-3x))Eu_xMoO_4 (x = 0.0; 0.0025; 0.005; 0.0075, and 0.01 mmol) materials prepared using the coprecipitation method. X-ray diffraction (XRD), Rietveld refinement analysis, and Raman spectroscopy confirmed that all of the synthesized β-Ag_((2-3x))Eu_xMoO_4 samples were perfectly monophasic, with spinel-like cubic structure. The results obtained in the morphological analysis indicate that the insertion of the Eu~(3+) ion into the β-Ag_2MoO_4 matrix favors the formation of surface defects and suggests that in higher concentrations of dopant the particles become more geometrically defined. The photoluminescence analysis (PL) was performed using two excitation sources: krypton laser and xenon lamp. Through the emission and excitation spectra it was observed that β-Ag_2MoO_4 exhibits broad band in the blue region, and as the concentration of Eu~(3+) increases this emission is gradually suppressed, giving rise to an intense emission with narrow and well-defined lines in the red region, confirming β-Ag_2MoO_4 as a good matrix capable of sensitizing and stabilizing the red emission of the Eu~(3+) ion. In addition, all other characterizations demonstrate that the replacement of Ag~+ by Eu~(3+) ions caused structural, morphological, and optical changes with lattice disturbances in the short, medium, and long ranges.

机译：在这项工作中,我们的调查报告β-Ag_ (2-3x) Eu_xMoO_4 (x = 2.8;0.0075和0.01更易)材料准备使用共沉淀法。(XRD),里特维德细化分析,拉曼光谱分析证实,所有的好几次合成β-Ag_ (()) Eu_xMoO_4样本完美的单相,spinel-like立方结构。形态分析表明,插入欧盟~(3 +)离子进入β-Ag_2MoO_4矩阵对表面缺陷的形成并建议在更高的浓度掺杂剂粒子更加几何定义的。使用两个执行激励来源:氪激光和氙灯。激发光谱是观察到β-Ag_2MoO_4展品宽频带的蓝色地区,欧盟~(3 +)的浓度增加这个排放逐渐压制,引起一场激烈的排放与狭隘在红色区域和明确的线路,证实β-Ag_2MoO_4矩阵作为一个好能干敏化和稳定的红色发射欧盟的~(3 +)离子。特征表明,更换Ag)由欧盟~(3 +)~ +离子引起的结构、形态和光学变化与晶格扰动在短、中、和长时间的范围。

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来源
《Chemical papers》 |2021年第5期|1869-1882|共14页
作者
Priscila B. Almeida; Ivo M. Pinatti; Regiane C. de OliveiraMayara M. TeixeiraClayane C. SantosThales R. MachadoElson LongoIeda L. V. Rosa;
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作者单位

Chemistry Departament, CDMF, Federal University of S?o Carlos, P. O. Box 676, S?o Carlos 13565?905, Brazil;

Faculty of Engineering of Guaratinguetá, S?o Paulo State University, UNESP, Guaratinguetá, SP 12516?410, Brazil;

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正文语种英语
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Europium; Doping in Sports; Surface defectsemissionXenon lampsSENSITIZINGExcitation spectraIons;

机译：铕掺杂在体育;表面defectsemissionXenon lampsSENSITIZINGExcitationspectraIons;

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Structural, morphological and photoluminescence properties of β?Ag_2MoO_4 doped with Eu~(3+)

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