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Multicolor emission in Agmn+ clusters and Eu3+ activated ZnO–P2O5 glasses achieved under near ultraviolet light excitation
Optical Materials ( IF 3.9 ) Pub Date : 2021-12-04 , DOI: 10.1016/j.optmat.2021.111833
O. Soriano-Romero 1 , I. Juárez-Rayón 1 , S. Carmona-Téllez 2 , G. Alarcón-Flores 3 , R. Lozada-Morales 1 , U. Caldiño 4 , C. Falcony 5 , A. Méndez-Blas 6 , A.N. Meza-Rocha 2
Affiliation  

The structural and photoluminescence properties of zinc phosphate glasses activated with Agmn+ clusters and Eu3+ are studied. The addition of Ag+ and Eu3+ does not significantly modify the glassy structural properties evaluated by X-ray diffraction (XRD) patterns and Raman spectroscopy. The only change observed by Raman spectroscopy, is ascribed to the creation of molecular oxygen. The photoluminescence spectra, recorded under near ultraviolet (NUV) light excitation, display the feature broad band attributed to Agmn+ clusters. With the Eu3+ addition, Eu3+ bands located at 578, 591, 611, 652 and 701 nm, appear on the Agmn+ cluster emission, achieving the highest intensity at 0.8 mol% of Eu3+. This behavior is accompanied by a gradual reduction of the Agmn+ cluster emission. Sinks related to Eu3+ absorption on Agmn+ cluster emission and shortening of Agmn+ cluster: S1 → S0 and T1,T2 → S0 emission decays, suggest respectively the existence of radiative and non-radiative energy transfers from Agmn+ clusters to Eu3+. The Burstein model points out that the non-radiative energy transfer processes are predominantly mediated by electric dipole-dipole interaction for the Agmn+ :S1 → S0 transition. The emission tonality, estimated from the CIE1931 chromaticity coordinates and correlated color temperature (CCT) can be tuned from the cold white region to the warm white one, with effective quantum yield measurements up to 48%, depending on the excitation wavelength and Eu3+ doping content. Emission tonalites out of the white light region (orange-pink, purple-pink and pink) are obtained at higher amounts of Eu3+ (0.8 and 1.0 mol%) as well.



中文翻译:

在近紫外光激发下实现的 Agmn+ 簇和 Eu3+ 激活的 ZnO-P2O5 玻璃中的多色发射

磷酸锌玻璃的结构和光致发光特性 n+簇和 Eu 3+进行了研究。添加 Ag +和 Eu 3+不会显着改变通过 X 射线衍射 (XRD) 图案和拉曼光谱评估的玻璃状结构特性。拉曼光谱观察到的唯一变化归因于分子氧的产生。在近紫外 (NUV) 光激发下记录的光致发光光谱显示特征宽带归因于n+集群。与欧盟3+另外,铕3+频带位于578,591,611,652和701纳米,出现在n+簇发射,在 0.8 mol% Eu 3+ 时达到最高强度。这种行为伴随着逐渐减少n+簇发射。与 Eu 3+吸收有关的汇n+ 簇发射和缩短 n+簇:S 1 → S 0和T 1 ,T 2 → S 0发射衰减,分别表明存在辐射和非辐射能量转移n+簇到 Eu 3+。Burstein 模型指出,非辐射能量转移过程主要由电偶极-偶极相互作用介导,n+:S 1 → S 0转换。根据 CIE1931 色度坐标和相关色温 ( CCT )估计的发射色调可以从冷白区域调整到暖白区域,有效量子产率测量值高达 48%,具体取决于激发波长和 Eu 3+兴奋剂含量。在较高量的 Eu 3+ (0.8 和 1.0 mol%) 下也获得了白光区域(橙色-粉色、紫色-粉色和粉色)之外的发射色调石。

更新日期:2021-12-04
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