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Spectroscopic analysis of alkaline-earth metal (Mg, Ca, Sr and Ba) co-doped Gd2O3:Eu phosphors synthesized via co-precipitation route.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-01-17 , DOI: 10.1016/j.saa.2020.118078 Ruby Priya 1 , O P Pandey 1
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-01-17 , DOI: 10.1016/j.saa.2020.118078 Ruby Priya 1 , O P Pandey 1
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This paper reports the effect of alkaline earth metals (AEM = Mg2+, Ca2+, Sr2+, Ba2+) co-doping on the structural, morphological and luminescent properties of Gd2O3:Eu phosphors. The concentration of the Eu3+ ions was fixed 4 mol% to avoid the chances of the concentration quenching. AEM co-doped Gd2O3:Eu XRD profile confirmed the synthesis of cubic-phase of all the co-doped samples. FESEM micrographs exhibited the rod like morphology of the synthesized phosphors. All the samples were irradiated under UV excitation and exhibited intense, sharp and narrow emission spectra corresponding to the characteristic transitions (5D0 → 7F1,2,3,4) transitions of Eu3+ ions. The photometric parameters such as CIE coordinates, CCT and color purity are calculated. In order to probe the further luminescent properties and influence of the of alkaline earth metals on the local environment of the Eu ions in the host lattice, spectral parameters are calculated from Judd Ofelt theory from emission spectra. The obtained results suggest that AEM can be effectively utilized to enhance the luminescence intensity even after concentration quenching. The as-synthesized phosphors can be used in various solid state lighting devices and bio-sensors.
中文翻译：
通过共沉淀途径合成的碱土金属（Mg，Ca，Sr和Ba）共掺杂的Gd2O3：Eu荧光粉的光谱分析。
本文报道了碱土金属（AEM = Mg2 +，Ca2 +，Sr2 +，Ba2 +）共掺杂对Gd2O3：Eu荧光粉的结构，形态和发光性能的影响。Eu3 +离子的浓度固定为4 mol％，以避免浓度猝灭的机会。AEM共掺杂Gd2O3：Eu XRD谱图证实了所有共掺杂样品的立方相合成。FESEM显微照片显示了合成磷光体的棒状形态。所有样品均在紫外线激发下辐照，并呈现出与Eu3 +离子的特征跃迁（5D0→7F1,2,3,4）跃迁相对应的强烈，尖锐和狭窄的发射光谱。计算光度参数，例如CIE坐标，CCT和色纯度。为了探测进一步的发光特性以及碱土金属元素对主晶格中Eu离子局部环境的影响，根据Judd Ofelt理论从发射光谱中计算出光谱参数。获得的结果表明，即使在浓度猝灭之后，也可以有效地利用AEM来增强发光强度。合成后的磷光体可用于各种固态照明设备和生物传感器中。
更新日期：2020-01-17
中文翻译：
通过共沉淀途径合成的碱土金属（Mg，Ca，Sr和Ba）共掺杂的Gd2O3：Eu荧光粉的光谱分析。
本文报道了碱土金属（AEM = Mg2 +，Ca2 +，Sr2 +，Ba2 +）共掺杂对Gd2O3：Eu荧光粉的结构，形态和发光性能的影响。Eu3 +离子的浓度固定为4 mol％，以避免浓度猝灭的机会。AEM共掺杂Gd2O3：Eu XRD谱图证实了所有共掺杂样品的立方相合成。FESEM显微照片显示了合成磷光体的棒状形态。所有样品均在紫外线激发下辐照，并呈现出与Eu3 +离子的特征跃迁（5D0→7F1,2,3,4）跃迁相对应的强烈，尖锐和狭窄的发射光谱。计算光度参数，例如CIE坐标，CCT和色纯度。为了探测进一步的发光特性以及碱土金属元素对主晶格中Eu离子局部环境的影响，根据Judd Ofelt理论从发射光谱中计算出光谱参数。获得的结果表明，即使在浓度猝灭之后，也可以有效地利用AEM来增强发光强度。合成后的磷光体可用于各种固态照明设备和生物传感器中。
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