SrAl2O4:Eu2+, Dy3+复合材料修饰的Sm(DBM)3phen复合物中的多光谱发射和拉长的红色发射衰减

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-10-10 DOI:10.1016/j.ceramint.2024.10.125

Kiran Kalkal, Pooja Uttam, Y. Dwivedi

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引用次数: 0

摘要

在本研究中，我们报告了在聚乙烯醇（PVA）基质中通过持久性发光荧光粉 SrAl2O4:Eu2+,Dy3+ (SrAl)的辐射转移刺激下，Sm(DBM)3phen（SDp）复合物的红色发射衰减拉长的情况。在 405 nm 激光激发下进行的详细光谱研究显示，以 520 nm 为中心的宽发射占主导地位，衰减时间较长，而 PVA 中的 SDp 复合物则产生特征性的黄红色发射，衰减时间为 535 μs。由于晶格效应，PVA 复合物会产生强度改变、峰形变化的混合发射。我们报告了不同浓度、层堆叠、晶格效应等条件下发射光谱的光谱分析。晶格导致发射峰变宽，从而促进了 SDp 复合物与 SrAl 荧光粉之间的相互作用。对 4G5/2→6H9/2（Sm3+ 离子）红色发射转变的辐射衰变分析表明，在 PVA 中，其衰变速度（535μs）比纯络合物慢（260μs）。此外，在 PVA 中有 SrAl 荧光粉存在的情况下，由于辐射衰减时间延长（∼3.5ms），即使在激发停止后仍有红色发射，这表明从荧光粉到 Sm(DBM)3phen 复合物之间的辐射传递效率很高（传递速率∼1580 s-1）。报告还介绍了详细的光物理和 CIE 坐标计算。

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Multispectral emissive and elongated red emission decay in Sm(DBM)3phen complex modified by SrAl2O4:Eu2+, Dy3+ composite

In the present study, we report elongated red emission decay in Sm(DBM)₃phen (SDp) complex stimulated via radiative transfer from a persistent luminescent phosphor SrAl₂O₄:Eu²⁺,Dy³⁺ (SrAl) in the Polyvinyl alcohol (PVA) matrix. The detailed spectroscopic investigations carried out on 405 nm laser excitation reveal the predominating broad emission, centered at 520 nm with a prolonged decay time, while the SDp complex in PVA yields characteristic yellow-red emissions with a decay time of ∼535 μs. The PVA composite yields an amalgam of emissions with modified intensities and changes in peak shape due to the lattice effect. We report spectroscopic analysis of the emission spectrum with varying concentrations, layer stacking, lattice effect, etc. The lattice leads the emission peak broadening, facilitating improved interaction between the SDp complex and SrAl phosphor. The radiative decay analysis of red emission for transition ⁴G_5/2 → ⁶H_9/2 (Sm³⁺ ion) reveals that in PVA host, it decays slower (∼535μs) than in the pure complex (∼260μs). Further, red emission was present even after cessation of excitation due to the elongated radiative decay (∼3.5 ms) in the presence of SrAl phosphor in PVA, indicating efficient radiative transfer (transfer rate of ∼1580 s⁻¹) from the phosphor to Sm(DBM)₃phen complex. Detailed photophysics and CIE coordinate calculations were presented.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.