钙离子掺杂对负热猝灭Sc2W3O12: Yb3+/Er3+荧光粉上转换发光的显著增强

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-09-09 DOI:10.1016/j.jphotochem.2025.116771

Yuanyuan Fan , Yongtao Liu , Shun Li , Bin Duan , Daobin Zhu , Keyu Guo , Rangrang Fan , Chunfeng Dong , Wei Jin , Junshan Hu

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引用次数: 0

摘要

上转换发光强度是高声子能量负热猝灭材料的关键问题。本文采用高温固相法制备了Sc2W3O12: Yb3+/Er3+/Ca2+ (SWO: Er/Yb/Ca)荧光粉，并在980 nm激光激发下研究了SWO: Er/Yb/Ca的多模UCL特性。Ca2+离子的最佳掺杂浓度为15%。与不含Ca2+的样品相比，荧光体的绿色和红色发射强度分别提高了306.33倍和23.45倍。在可见光区呈现出三个特征发射峰：（528 nm, 2H11/2→4I15/2）、（551 nm, 4S3/2→4I15/2）、（657 nm, 4F9/2→4I15/2）。分析了Sc2W3O12:Yb3+/Er3+/Ca2+的吸收光谱、UCL光谱和下转换发光光谱。(1)通过构建热耦合能级（2H11/2-4S3/2）的玻尔兹曼分布模型，在523 K处获得最大相对灵敏度SR = 0.247% K−1；(2)结合非热耦合能阶（2H11/2-4F9/2）和荧光强度比（FIR）进行温度依赖分析，在298 K处相对灵敏度达到0.962% K−1的峰值。(3)采用交叉弛豫补偿模式（4S3/2-4F9/2）实现了523 K时的SR = 0.403 % K−1，为非接触式多模温度传感提供了新的材料和思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Giant enhancement in upconversion luminescence of negative thermal quenching Sc2W3O12: Yb3+/Er3+ phosphors by Ca2+ ions doping for multi-mode temperature sensing

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Giant enhancement in upconversion luminescence of negative thermal quenching Sc2W3O12: Yb3+/Er3+ phosphors by Ca2+ ions doping for multi-mode temperature sensing

Upconversion luminescence (UCL) intensity is a critical issue for negative thermal quenching material with high phonon energy. In this work, the phosphors of Sc₂W₃O₁₂: Yb³⁺/Er³⁺/Ca²⁺ (SWO: Er/Yb/Ca) were prepared by high-temperature solid-phase method, and the multi-mode UCL characteristics of SWO: Er/Yb/Ca excited by 980 nm laser. The optimal doping concentration for Ca²⁺ ions is 15 %. Compared with the sample without Ca²⁺ ions, the green and red emission intensities of the phosphor were increased by 306.33 times and 23.45 times, respectively. It presents three characteristic emission peaks in the visible region: (528 nm, ²H_11/2 → ⁴I_15/2), (551 nm, ⁴S_3/2 → ⁴I_15/2), (657 nm, ⁴F_9/2 → ⁴I_15/2). The absorption spectrum, UCL spectrum and downconversion luminescence spectra of Sc₂W₃O₁₂:Yb³⁺/Er³⁺/Ca²⁺ were analyzed. A multi-mode temperature sensing system was innovatively constructed, covering three independent temperature sensing channels: (1) by constructing a Boltzmann distribution model of the thermal coupling energy level (²H_11/2-⁴S_3/2), the maximum relative sensitivity S_R = 0.247 % K⁻¹ was obtained at 523 K; (2) Combined with the non-thermally coupled energy level (²H_11/2-⁴F_9/2) and fluorescence intensity ratio (FIR) for temperature-dependent analysis, the relative sensitivity reached a peak of 0.962 % K⁻¹ at 298 K. (3) S_R = 0.403 % K⁻¹ at 523 K is achieved by cross-relaxation compensation mode (⁴S_3/2-⁴F_9/2), which provides new materials and ideas for non-contact multi-mode temperature sensing.

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.