Journal of Luminescence最新文献_第8页

A significant enhancement in the luminescent properties of Ga2O3:Eu3+ phosphors induced by fluorine-doping 氟掺杂对Ga2O3:Eu3+荧光粉发光性能的显著增强

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-03-01 Epub Date: 2025-12-16 DOI: 10.1016/j.jlumin.2025.121703

Duo Chen, Ruiyuan Bi, Lifeng Xun, Xiaopeng Zhao

Building upon an anion doping strategy, this study proposes using F⁻ regulation to enhance the luminescence performance of Ga₂O₃:Eu³⁺ phosphors. To address the contradiction between the low Eu³⁺ characteristic absorption and the strong Ga₂O₃ intrinsic emission induced by charge transfer band (CTB) excitation in traditional Ga₂O₃:Eu³⁺ systems, this study successfully prepared a series of Ga₂O₃:Eu³⁺/F⁻ phosphors with different F⁻ doping concentrations using an oleic acid-assisted solvothermal method combined with high-temperature sintering. The phases, morphology, structure, and luminescent properties of the samples were systematically analyzed. Experimental results show that F⁻ successfully replaces part of the O²⁻ in the phosphor and alters the local symmetry of Eu³⁺, which results in ⁵D₀→⁷F₁ becoming the main transition path for the characteristic luminescence of Eu³⁺, shifting the main emission peak from 615 nm to 587 nm. Under CTB excitation, F⁻ doping significantly enhanced the Eu³⁺ characteristic emission without significantly altering the Ga₂O₃ matrix emission. Under optimal reaction conditions, the luminescence intensity of the magnetic dipole transition in Ga₂O₃:Eu³⁺/F⁻ phosphor was enhanced approximately 26-fold, with the quantum yield reaching 9.26 % and the ⁵D₀ excited state lifetime increasing to 1.83 ms. This modulation of the emission behavior also caused the phosphor chromaticity to shift from blue-purple to orange. This study demonstrates the selective enhancement mechanism of F⁻ doping in Ga₂O₃:Eu³⁺ luminescence, providing a reference for the design of high-performance rare-earth luminescent materials.

在阴离子掺杂策略的基础上，本研究提出使用F -调控来提高Ga2O3:Eu3+荧光粉的发光性能。针对传统Ga2O3:Eu3+体系低Eu3+特征吸收与电荷转移带（CTB）激发引起的强Ga2O3本态发射之间的矛盾，本研究采用油酸辅助溶剂热法结合高温烧结成功制备了一系列不同F−掺杂浓度的Ga2O3:Eu3+/F−荧光粉。系统地分析了样品的物相、形貌、结构和发光性能。实验结果表明，F−成功地取代了荧光粉中的部分O2−，改变了Eu3+的局部对称性，导致5D0→7F1成为Eu3+特征发光的主要跃迁路径，使主发射峰从615 nm移至587 nm。在CTB激发下，F−掺杂显著增强了Eu3+的特征发射，而没有显著改变Ga2O3基体的发射。在最佳反应条件下，Ga2O3:Eu3+/F−荧光粉的磁偶极子跃迁发光强度提高了约26倍，量子产率达到9.26%，5D0激发态寿命提高到1.83 ms。这种发射行为的调制也使荧光粉的色度从蓝紫色转变为橙色。本研究揭示了F−掺杂对Ga2O3:Eu3+发光的选择性增强机理，为高性能稀土发光材料的设计提供参考。

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引用次数: 0

Zero-dimensional organic-inorganic metal chloride (C9H13N2)2MnCl4 with highly efficient yellow emission for white light-emitting diode and flexible X-ray imaging 零维有机-无机金属氯化物（C9H13N2）2MnCl4具有高效的黄色发光白光二极管和柔性x射线成像

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-03-01 Epub Date: 2025-12-22 DOI: 10.1016/j.jlumin.2025.121718

Xiaoping Zhou , Jiangcong Zhou , Lijuan Xiao , Zhiwei Tang , Changlin Cai , Ting Zhong , Daying Yu , Yunfang Zhao , Rui Zhang

Conventional lead-halide perovskites face persistent challenges of toxicity and instability, severely limiting their applications in commercial X-ray detection and solid-state lighting. This study introduces a novel lead-free, zero-dimensional organic-inorganic manganese(II) chloride, (C₉H₁₃N₂)₂MnCl₄ (C₉H₁₃N₂= PYP). which features strong luminescence, good stability, and high environmental compatibility. This material exhibits a bright yellow emission at 562 nm (full width at half maximum of 87 nm), a high photoluminescence quantum yield of 82.6 % and a long decay lifetime of 2.7 ms. This crystal shows excellent thermal stability, remaining undecomposed up to 240 °C. Moreover, it maintains its structural phase and luminescence intensity after one month of exposure to air. When integrated into a 450 nm InGaN chip, the material enables a stable white-light LED with CIE coordinates of (0.3344, 0.3328), a correlated color temperature of ≈5450 K, a color rendering index (Ra) of 67.6, and a luminous efficacy of 56.37 lm W⁻¹. Moreover, (PYP)₂MnCl₄ functions as a high-gain X-ray scintillator, delivering a light yield of 82,830 photons MeV⁻¹ and showing a linear response across a wide dose-rate range (100–1200 μGy s⁻¹), with a low detection limit of 5.8 μGy s⁻¹. Flexible and transparent composite films fabricated from this material maintain full emission under repeated bending and achieve a spatial resolution of 10 lp mm⁻¹ in X-ray imaging. These results collectively establish (PYP)₂MnCl₄ as a highly promising candidate for next-generation solid-state lighting and high-resolution X-ray imaging technologies.

传统的卤化铅钙钛矿面临着毒性和不稳定性的持续挑战，严重限制了它们在商业x射线探测和固态照明中的应用。本研究介绍了一种新型无铅、零维有机无机氯化锰（II），（C9H13N2）2MnCl4 （C9H13N2= PYP）。发光性强，稳定性好，环境相容性高。该材料具有562 nm的亮黄色发光（半宽为87 nm）、82.6%的高光致发光量子产率和2.7 ms的长衰减寿命。该晶体表现出优异的热稳定性，在240°C下保持未分解。暴露在空气中一个月后，其结构相和发光强度仍保持不变。当将该材料集成到450nm InGaN芯片中时，可产生稳定的白光LED，其CIE坐标为（0.3344,0.3328），相关色温为≈5450 K，显色指数（Ra）为67.6，发光效率为56.37 lm W−1。此外，（PYP）2MnCl4作为高增益x射线闪烁体，提供82,830光子MeV−1的光产率，并在宽剂量率范围（100-1200 μGy s−1）内表现出线性响应，低检测限为5.8 μGy s−1。由该材料制成的柔性和透明复合薄膜在反复弯曲下保持完全发射，在x射线成像中实现10 lp mm−1的空间分辨率。这些结果共同确立了（PYP）2MnCl4作为下一代固态照明和高分辨率x射线成像技术的非常有前途的候选者。

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引用次数: 0

Femtosecond laser-mediated defect engineering in neutron-irradiated hBN: Molecular dynamics and temperature-dependent annealing investigation 飞秒激光介导的中子辐照hBN缺陷工程：分子动力学和温度相关退火研究

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-03-01 Epub Date: 2025-12-23 DOI: 10.1016/j.jlumin.2025.121726

Yifei Duan , Jianshi Wang , Fei Ren , Mengzhi Yan , Chengqi Yao , Bing Dong , Shaojia Huang , Wei Zhao , Tiantian Chen , Yukun Zhao , Fu Wang , Zongwei Xu

As a van der Waals quantum material with a wide bandgap and high stability, hexagonal boron nitride (hBN) demonstrates broad application prospects in quantum sensing and single-photon sources. Among its defects, the boron vacancy defect (

V_{B}^{-})

color centers have attracted significant attention due to their applications in quantum sensing and stability in few-layer hBN. Although conventional thermal neutron irradiation can introduce/induce

V_{B}^{-}

color centers, its spatial resolution is limited. This makes it difficult to achieve localized control of their concentration or to optimize the defect environment in specific micro-scale regions, hindering their precise integration into devices. Here we demonstrate a synergistic strategy combining femtosecond (fs) laser and thermal neutron irradiation to achieve site-specific modification of pre-irradiated hBN samples. This approach results in a significant enhancement (20–30 %) in

V_{B}^{-}

photoluminescence (PL) intensity and improves high-temperature stability. Through atomic force microscopy (AFM), PL spectroscopy, optically detected magnetic resonance (ODMR), and molecular dynamics simulations, the mechanism of laser-induced defect enrichment is systematically elucidated. Gradient thermal annealing experiments further confirm that fs-laser irradiation significantly enhances the thermal stability of

V_{B}^{-}

color centers. This work provides new insights and experimental foundations for the design and fabrication of high-temperature quantum devices based on hBN.

六方氮化硼（hBN）作为一种具有宽带隙和高稳定性的范德瓦尔斯量子材料，在量子传感和单光子源方面具有广阔的应用前景。其中，硼空位缺陷（VB−）色心因其在量子传感和在少层hBN中的稳定性方面的应用而备受关注。虽然传统的热中子辐照可以引入/诱导VB -色心，但其空间分辨率有限。这使得难以实现对其浓度的局部控制或在特定微尺度区域优化缺陷环境，阻碍了它们精确集成到器件中。在这里，我们展示了一种结合飞秒（fs）激光和热中子辐照的协同策略，以实现预辐照的hBN样品的特定位点修饰。该方法显著增强了VB−光致发光（PL）强度（20 - 30%），并提高了高温稳定性。通过原子力显微镜（AFM）、PL光谱、光学检测磁共振（ODMR）和分子动力学模拟，系统地阐明了激光诱导缺陷富集的机理。梯度热退火实验进一步证实了fs激光辐照显著增强了VB−色心的热稳定性。这一工作为基于hBN的高温量子器件的设计和制造提供了新的见解和实验基础。

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引用次数: 0

Charge compensation boosts luminous efficiency to achieve ultra-low doped optical thermometer CaWO4: Tb3+ phosphors 电荷补偿提高了发光效率，实现了超低掺杂光学温度计CaWO4: Tb3+荧光粉

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-03-01 Epub Date: 2025-12-24 DOI: 10.1016/j.jlumin.2025.121725

Linlin Li , Lingxuan Kong , Jingying Chen , Zhi Zhu , Xu Tang , Xuan Wei , Hongyue Wu

Optical temperature measurement is crucial in various fields, driving the development of fluorescent thermometer materials that are highly sensitive, environmentally friendly, and cost-effective. This paper investigates a temperature sensitive phosphor material based on CaWO₄: Tb³⁺, which achieves ultra-low doping concentration temperature measurement by co-doping Li⁺ as a charge compensator. A series of CaWO₄: Tb³⁺ phosphors were synthesized using the high-temperature solid-phase method, and their structures and luminescent properties were studied. XRD Rietveld refinement shows that the introduction of Li⁺ leads to a slight reduction in lattice volume, effectively alleviating the lattice distortion caused by Tb³⁺ doping. The photoluminescence spectra show that the introduction of Li⁺ significantly enhances the luminescence intensity of Tb³⁺, as Li⁺ reduces lattice defects and improves luminous efficiency. More importantly, by optimizing the doping concentration, CaWO₄: 0.0005Tb³⁺, 0.0005Li⁺ phosphor was successfully prepared, and high-sensitivity temperature measurement was achieved. The phosphors exhibits excellent fluorescence intensity ratio and chromaticity variation in the temperature range of 293–473 K, with absolute and relative sensitivity reaching 0.21 K⁻¹ at 473 K and 2.2 % K⁻¹ at 473 K, respectively, making it an ideal material for ultra-low doping concentration optical temperature measurement.

光学温度测量在各个领域都是至关重要的，推动了高灵敏度、环保和成本效益的荧光温度计材料的发展。本文研究了一种基于CaWO4: Tb3+的温度敏感荧光粉材料，该材料通过共掺杂Li+作为电荷补偿器实现了超低掺杂浓度温度的测量。采用高温固相法合成了一系列CaWO4: Tb3+荧光粉，并对其结构和发光性能进行了研究。XRD Rietveld细化表明，Li+的引入使晶格体积略有减小，有效缓解了Tb3+掺杂引起的晶格畸变。光致发光光谱表明，Li+的引入显著增强了Tb3+的发光强度，减少了晶格缺陷，提高了发光效率。更重要的是，通过优化掺杂浓度，成功制备了CaWO4: 0.0005Tb3+， 0.0005Li+荧光粉，并实现了高灵敏度的测温。在293 ~ 473 K温度范围内，荧光强度比和色度变化良好，绝对灵敏度和相对灵敏度分别达到0.21 K−1和2.2% K−1，是超低掺杂浓度光学测温的理想材料。

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引用次数: 0

Mg-intercalated GaN superlattices enhancing the performance of AlGaN UVC LEDs 镁嵌入GaN超晶格提高AlGaN UVC led的性能

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-03-01 Epub Date: 2025-12-22 DOI: 10.1016/j.jlumin.2025.121723

Changde Luo , Zian Dong , Xiangshou Zeng , Zhangfeng Tao , Ni Ma , Jun Li , Jason Hoo , Bingdong Pan , Shiping Guo , Guojian Ding , Yang Wang , Xiaohui Wang , Haiqiang Jia , Qiao Wang , Rong Yang , Yangfeng Li

The aluminum gallium nitride (AlGaN) ultra-violet light-emitting diodes (UV LEDs) emitting at the UVC range render environmentally-friendly efficient sterilization, disinfection, and water purification. However, the high activation energy of magnesium (Mg) in p-AlGaN hinders the improvement of UVC LEDs. In this study, we demonstrate a Mg-delta doping in p-AlGaN to reduce the reverse leakage current and augment the light-output power of UVC LEDs. The UVC LEDs incorporating this design exhibit a significant reduction in reverse leakage current by 71 % and a notable enhancement in light output power (LOP) compared to conventional devices. The Mg-intercalated GaN superlattices structure has been observed by scanning transmission electron microscopy (STEM), which will both increase the hole concentration and mobility in AlGaN, thus leading to an outperforming performance of UVC LEDs.

氮化铝镓（AlGaN）紫外发光二极管（UV LEDs）在UVC范围内发光，实现环保高效的杀菌、消毒和水净化。然而，p-AlGaN中镁（Mg）的高活化能阻碍了UVC led的改进。在这项研究中，我们展示了在p-AlGaN中掺杂mg - δ，以减少反向漏电流并增加UVC led的光输出功率。与传统器件相比，采用这种设计的UVC led显着减少了71%的反向漏电流，并显着提高了光输出功率（LOP）。通过扫描透射电子显微镜（STEM）观察到mg嵌入GaN的超晶格结构，这将增加AlGaN中的空穴浓度和迁移率，从而导致UVC led的优异性能。

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引用次数: 0

Efficient blue-to-UV-B up-conversion in Li2CaSiO4:Pr,Gd,Na Li2CaSiO4:Pr,Gd，Na中蓝光到uv - b的高效上转换

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-03-01 Epub Date: 2025-12-22 DOI: 10.1016/j.jlumin.2025.121700

Christoph Rick, Thomas Jüstel

The present work concerns the efficient blue-to-UV-B up-conversion in the host material Li₂CaSiO₄ by co-doping with Pr³⁺ and Gd³⁺. The focus is on excitation with a 488 nm laser diode, which initiates a multi-stage energy transfer process resulting in intense emission in the UV-B range at 311 nm. The maximum emission intensity was observed at a Gd³⁺ doping level of 10 mol%. The spectral analyses demonstrate an efficient, non-radiative energy transfer from the Pr³⁺ to the Gd³⁺ ion as the central mechanism of this process. The up-conversion emission achieved is primarily based on a two-photon process, which is triggered particularly effectively by the high-power density of the laser light. These results emphasise the potential of the investigated materials for applications in photomedical therapy and UV-based disinfection, where compact laser systems can be used.

本研究是通过与Pr3+和Gd3+共掺杂，在主体材料Li2CaSiO4中实现蓝光到uv - b的高效上转换。重点是488nm激光二极管的激发，它启动了一个多阶段的能量转移过程，导致在311nm的UV-B范围内强烈发射。在Gd3+掺杂量为10 mol%时，观察到最大的发射强度。光谱分析表明，Pr3+向Gd3+离子的有效非辐射能量转移是这一过程的主要机制。实现的上转换发射主要基于双光子过程，这是由激光的高功率密度特别有效地触发。这些结果强调了所研究材料在光电治疗和基于紫外线的消毒方面的应用潜力，在这些领域可以使用紧凑的激光系统。

引用次数: 0

Mastering the suppression of the phosphorescence of Pr-doped aluminum-gallium Gd1.5Y1.5Al2Ga3O12 ceramic scintillators 掌握了掺pr铝镓Gd1.5Y1.5Al2Ga3O12陶瓷闪烁体的磷光抑制

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-02-01 Epub Date: 2025-11-25 DOI: 10.1016/j.jlumin.2025.121674

M. Korzhik , V. Smyslova , A. Bondarau , V. Dubov , E. Borisevich , K. Ivanovskikh , P. Karpuyk , I. Komendo , V. Pustovarov , D. Tavrunov , Y. Talochka

The radioluminescence and phosphorescence of Gd_1.5Y_1.5Al₂Ga₃O₁₂ transparent scintillation ceramics doped with Pr³⁺, Ce³⁺, or their combination, as well as co-doped with Mg²⁺ were investigated for the first time. The results demonstrate that phosphorescence, which is a well-known phenomenon in Pr³⁺-doped aluminum-gallium garnets, can be effectively suppressed by introduction of Ce³⁺ ions and a small concentration of Mg²⁺ in the ceramics. The yield of radioluminescence of Ce³⁺ and Pr³⁺ co-doped ceramics was found to exceed a little that of ceramics doped solely with Ce³⁺, showing a low dependence on dopant concentration. The study also reveals that the Gd sublattice plays a crucial role in energy transfer between doping ions. Mg²⁺ co-doping acts similarly to the aluminum-gallium garnets solely doped with Ce; it suppresses phosphorescence in Pr³⁺-doped polycationic garnets resulting in sufficient diminishing of the afterglow level. Developed materials maintain high scintillation efficiency which makes them promising for applications in radiation detection.

本文首次研究了掺杂Pr3+、Ce3+或其组合以及共掺杂Mg2+的Gd1.5Y1.5Al2Ga3O12透明闪烁陶瓷的辐射发光和磷光特性。结果表明，在Pr3+掺杂的铝镓石榴石中常见的磷光现象可以通过在陶瓷中引入Ce3+离子和少量Mg2+来有效抑制。Ce3+和Pr3+共掺杂陶瓷的辐射致发光率略高于单独掺杂Ce3+的陶瓷，且对掺杂浓度的依赖性较低。研究还揭示了Gd亚晶格在掺杂离子之间的能量传递中起着至关重要的作用。Mg2+共掺杂与单独掺杂Ce的铝镓石榴石的行为相似；它抑制了Pr3+掺杂的多阳离子石榴石的磷光，导致余辉水平的充分降低。所开发的材料具有较高的闪烁效率，在辐射探测领域具有广阔的应用前景。

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引用次数: 0

Excellent aggregation-induced emission and mechanofluorochromic performances of donor–acceptor luminophores functionalized with tetraphenylethene 四苯乙烯功能化的给受体发光团具有优异的聚集诱导发射和机械荧光性能

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-02-01 Epub Date: 2025-11-26 DOI: 10.1016/j.jlumin.2025.121667

Juanfang Zhou , Zhihao Zhou , Meng Li , Yanhong Zhou , Xiaohan Ma , Dehao Xie , Xingliang Liu , Defang Xu

Two novel D-A type MFC molecules, BTPEBZBP and BTPECEBP, incorporating tetraphenylethylene units, were synthesized via a unified synthetic route. Both compounds exhibit pronounced ICT characteristics and significant AIE behavior, with AIE factors exceeding 135 and 58, respectively. Notably, they demonstrate exceptional MFC performance. The pristine powders of BTPEBZBP and BTPECEBP display intense blue and yellow-green luminescence, correspondingly. Mechanical grinding causes their luminescence colors to transform to green and orange-red, respectively. The fluorescence peaks exhibit redshifts, shifting from 461 nm to 533 nm–504 nm and 594 nm, accordingly. Additionally, the solid-state emission efficiencies of BTPEBZBP and BTPECEBP notably elevate from 0.135 to 0.174 to 0.175 and 0.385, respectively, upon mechanical stimulation. BTPEBZBP exhibits reversible MFC characteristics when exposed to DCM vapors, while ground BTPECEBP samples transition to Y-powders emitting yellow fluorescence with the wavelength of about 567 nm under DCM vapor fuming, demonstrating three-color fluorescence switching. The MFC properties of both compounds arise primarily from the transformation between crystalline and non-crystalline states. The detected bathochromic shift in PL spectra stems from a decreased bandgap, which results from extended π-conjugation, enhanced PICT effects, strengthened π-π stacking, and elevated exciton coupling coupled with stronger orbital overlap between adjacent molecules.

采用统一的合成路线合成了含四苯基乙烯单元的新型D-A型MFC分子BTPEBZBP和BTPECEBP。两种化合物均表现出明显的ICT特征和显著的AIE行为，AIE因子分别超过135和58。值得注意的是，它们表现出卓越的MFC性能。BTPEBZBP和BTPECEBP的原始粉末分别显示出强烈的蓝色和黄绿色发光。机械研磨使其发光颜色分别转变为绿色和橙红色。荧光峰呈现红移，从461 nm移至533 nm - 504 nm和594 nm。机械增产后，BTPEBZBP和BTPECEBP的固态发射效率分别从0.135提高到0.174，再提高到0.175和0.385。BTPEBZBP暴露于DCM蒸汽时表现出可逆的MFC特性，而磨后的btpeebp样品在DCM蒸汽发烟作用下转变为y -粉末，发出波长约为567 nm的黄色荧光，呈现三色荧光切换。这两种化合物的MFC性质主要来自于晶体和非晶体状态之间的转变。由于π-共轭作用的扩大、PICT效应的增强、π-π叠加的增强以及激子耦合的增强以及相邻分子之间轨道重叠的增强，导致了带隙的减小。

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引用次数: 0

Organic doping-based optimization of triplet radioluminescence of Tb3+/Ga3+ metallacrown scintillators for X-Ray detection 基于有机掺杂的Tb3+/Ga3+金属冠闪烁体三态辐射发光优化研究

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-02-01 Epub Date: 2025-11-26 DOI: 10.1016/j.jlumin.2025.121677

Mengke Bai , Wenya Lai , Fei Zhou , Hangqing Xie , Jing Xu , Jiadi Lian , Shiqing Xu

Triplet excitons serve as a critical pathway for harvesting energy released during X-ray interactions with heavy elements; however, strategies to enhance their activation efficiency remain limited. Herein, we report a novel organic doping approach to optimize the triplet radioluminescence (RL) of Tb³⁺/Ga³⁺ metallacrown (Tb-1) scintillators. By introducing 1,2,4,5-benzenetetracarboxylic acid (PMA) as a ligand dopant, a new scintillation crystal, Tb-1-PMA, is synthesized. Compared to the Tb-1 crystal, Tb-1-PMA exhibits a significant reduction in metal content while maintaining structural integrity. When excited by ultraviolet light or X-rays, Tb-1-PMA crystal emit bright green light, and the photoluminescence quantum yield (PLQY) is increased from 36.8 % to 45.3 %. The RL intensity of Tb-1-PMA surpasses that of Tb-1 by 50 %, achieving a relative light yield of 17,000 photons MeV⁻¹, accompanied by nearly eliminated afterglow. These enhancements stem from improved energy-level alignment between organic triplet excitons and Tb³⁺ in Tb-1-PMA, enabling efficient energy transfer. The RL intensity demonstrates a linear response to X-ray dose rates, with a detection limit of 0.044 μGy s⁻¹, approximately 123-fold lower than conventional diagnostic doses. This work provides a cost-effective and scalable strategy for designing organic-doped high-performance triplet-emitting scintillators.

三重态激子是收集x射线与重元素相互作用时释放的能量的关键途径；然而，提高其激活效率的策略仍然有限。本文报道了一种新的有机掺杂方法来优化Tb3+/Ga3+金属冠（Tb-1）闪烁体的三重态辐射发光（RL）。通过引入1,2,4,5-苯四羧酸（PMA）作为配体掺杂剂，合成了一种新的闪烁晶体tb1 -PMA。与Tb-1晶体相比，Tb-1- pma在保持结构完整性的同时显着降低了金属含量。在紫外光或x射线激发下，Tb-1-PMA晶体发出明亮的绿光，光致发光量子产率（PLQY）由36.8%提高到45.3%。Tb-1- pma的RL强度超过Tb-1 50%，相对产光量达到17000个光子MeV−1，并伴有几乎消除的余辉。这些增强源于Tb-1-PMA中有机三重态激子和Tb3+之间的能级对齐改善，从而实现有效的能量传递。RL强度与x射线剂量率呈线性关系，检测限为0.044 μGy s−1，比常规诊断剂量低约123倍。这项工作为设计有机掺杂的高性能三重态发光闪烁体提供了一种具有成本效益和可扩展性的策略。

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引用次数: 0

Design of dual-mode optical thermometry using Sb3+/Mn2+ codoped Cs2NaLuCl6 double perovskite Sb3+/Mn2+共掺杂Cs2NaLuCl6双钙钛矿双模光学测温设计

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-02-01 Epub Date: 2025-11-30 DOI: 10.1016/j.jlumin.2025.121687

Zehua Zhang, Lili Wang, Ruiliang Zuo, Zhenzhen Jiang, Guangyong Jin

Wide band emission has aroused widespread focus in various fields such as display, plant lighting, and solar cells due to its spectral continuity. Here, a series of Sb³⁺/Mn²⁺ doped Cs₂NaLuCl₆ double perovskites with wide blue and red emissions were synthesized through a precipitation method. Enhanced self-trapped exciton (STE) emission and red emission of Mn²⁺ ion are achieved by doping Sb³⁺ ion to construct energy transfer channels. The temperature dependent fluorescence spectra exhibit that the emission intensity at 418 K remains 66.4% of that at 298 K in Cs₂NaLuCl₆: 1% Sb³⁺, 10% Mn²⁺ microcrystal. Importantly, the full-width at half-maximum (FWHM) of STE and Mn²⁺ ion emissions show obvious broadening as the temperature increases, which is attributed to the enhanced electron-phonon interaction. The optical temperature sensing method based on FWHM of STE and Mn²⁺ emissions is designed, the corresponding maximum relative sensitivity (S_r) values are 0.14% at 298 K and 0.61% at 448 K, respectively. Furthermore, due to the fluorescence intensity ratio (FIR) between STE and Mn²⁺ ion is highly temperature-dependent, the temperature sensing based on FIR technique is investigated. The maximum S_r values reach 1.31% K⁻¹ at 448 K under 317 nm excitation. The minimum temperature resolution (δT) is calculated as 0.26 K at 448 K. The dual-mode temperature measurement methods based on FWHM and FIR can achieve more accurate remote temperature measurement. These results indicate the microcrystal has potential application in the fields of optical temperature thermometry.

宽带发射由于其光谱的连续性，在显示、植物照明、太阳能电池等领域引起了广泛的关注。本文采用沉淀法合成了一系列Sb3+/Mn2+掺杂的Cs2NaLuCl6双钙钛矿，具有宽蓝光和红光发射。通过掺杂Sb3+离子构建能量传递通道，实现了Mn2+离子的自捕获激子（STE）发射和红光发射增强。温度依赖性荧光光谱显示，在Cs2NaLuCl6: 1% Sb3+， 10% Mn2+的微晶体中，418 K时的发射强度保持在298 K时的66.4%。重要的是，随着温度的升高，STE和Mn2+离子发射的半最大值全宽度（FWHM）表现出明显的展宽，这是由于电子-声子相互作用的增强。设计了基于STE和Mn2+发射FWHM的光学温度传感方法，在298 K和448 K时的最大相对灵敏度Sr值分别为0.14%和0.61%。此外，由于STE和Mn2+离子之间的荧光强度比（FIR）具有高度的温度依赖性，因此研究了基于FIR技术的温度传感技术。在317 nm激发下，在448 K处Sr值最大达到1.31% K−1。最小温度分辨率（δT）在448 K时为0.26 K。基于FWHM和FIR的双模测温方法可以实现更精确的远程测温。这些结果表明该微晶体在光学测温领域具有潜在的应用前景。

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