Journal of Luminescence最新文献_第4页

Concentration-dependent on structural and optical behaviors of Yb2O3-modified Nd3+-doped phosphate glasses yb2o3修饰的掺Nd3+磷酸盐玻璃的结构和光学行为

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-05-01 Epub Date: 2026-01-20 DOI: 10.1016/j.jlumin.2026.121776

M. Shoaib , He Yongtai , A. Ahmad , Xingfa Zi , I. Khan , Gul Rooh , N. Chanthima , N. Intachai , S. Kothan , N. Kiwsakunkran , J. Kaewkhao

In the present work, the effects of Yb³⁺ ion concentrations on the physical, optical and structural properties of Nd³⁺ ions doped phosphate glasses have been investigated. A series of P₂O₅-Nb₂O₅-Na₂O-Li₂O-Nd₂O₃-Yb₂O₃ glasses were synthesized through melt quenching technique. The study shows that with the increasing concertation of Yb₂O₃, the density of the samples increases and the molar volume decreases, demonstrating structural changes. The structure changes also recorded from the FTIR and RAMAN spectra. The absorption spectra show the transition bands associated to Nd³⁺ and Yb³⁺ transitions, and the obvious hypersensitive transitions recorded at 582 nm. The Judd-Ofelt analysis identifies intensity parameters with Ω ₄>Ω₂>Ω ₆ trend, that can be further used to calculate radiative properties. Furthermore, the 1060 nm near-infrared emission corresponding to the Nd³⁺ (⁴F_3/2 → ⁴I_11/2) transition is significantly affected by the content of Yb³⁺ ions demonstrating the energy transfer from Nd³⁺ to Yb³⁺ ions. The optimum Nd³⁺: Yb³⁺ molar ratio of 1.0: 0.7 shows enhanced luminescence, making these glasses promising candidates for photonic applications such as lasers and light amplifiers. The study provides valuable insights into the optimization of rare earth ions concentrations in the phosphate glass matrix for use in advanced optical technologies.

本文研究了Yb3+离子浓度对Nd3+离子掺杂磷酸盐玻璃的物理、光学和结构性能的影响。采用熔体淬火技术合成了P2O5-Nb2O5-Na2O-Li2O-Nd2O3-Yb2O3系列玻璃。研究表明，随着Yb2O3浓度的增加，样品的密度增大，摩尔体积减小，呈现出结构变化。FTIR和RAMAN光谱也记录了结构的变化。吸收光谱显示Nd3+和Yb3+跃迁相关的跃迁带，在582 nm处记录到明显的超敏跃迁。Judd-Ofelt分析确定了具有Ω 4>；Ω2>；Ω 6趋势的强度参数，可进一步用于计算辐射特性。此外，Nd3+ （4F3/2→4I11/2）跃迁对应的1060 nm近红外发射受到Yb3+离子含量的显著影响，表明Nd3+向Yb3+离子的能量转移。最佳的Nd3+: Yb3+摩尔比为1.0:0.7，显示出增强的发光，使这些玻璃成为光子应用（如激光和光放大器）的有希望的候选者。该研究为优化磷酸盐玻璃基质中的稀土离子浓度提供了宝贵的见解，可用于先进的光学技术。

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引用次数: 0

The micro-modified β-diketone boron derivatives based on tetraphenylethylene possess aggregation-induced emission and high-contrast mechanochromism 基于四苯基乙烯的微改性β-二酮硼衍生物具有聚集致发光和高对比度的机械致色性

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-05-01 Epub Date: 2026-01-18 DOI: 10.1016/j.jlumin.2026.121756

Hongxu Wang , Pancheng Feng , Qian Tao , Hongquan Fu , Zizhuan Zhang , Bin Wang , Ying Zhang

Mechanochromic materials exhibiting outstanding reversibility and high contrast have garnered significant attention for applications across numerous fields. We strategically designed and synthesized two novel tetraphenylethylene-modified difluoroboron-β-diketone acid complexes TPE-Nap and TPE-Qui, modifying the N-substituents, to clarify the impact of the ring group transformations on aggregation behaviour and emission properties. The electronic effect of nitrogen substitution groups plays a key role in regulating the emission and the aggregation mode, demonstrating a strong correlation with Hammett constants. It demonstrates precise control over ring group effects on aggregation modes and emission behaviour, elucidates the underlying regulatory. This work demonstrates precise control over ring group effects on aggregation modes and emission behaviour, elucidates the underlying regulatory mechanism, and underscores its significance for tailoring advanced functional materials.

机械致色材料表现出优异的可逆性和高对比度，在许多领域的应用获得了极大的关注。我们策略性地设计和合成了两种新型的四苯乙烯修饰的二氟硼-β-二酮酸配合物TPE-Nap和TPE-Qui，修改了n取代基，以阐明环基转化对聚集行为和发射性质的影响。氮取代基的电子效应在调控发射和聚集模式中起着关键作用，与Hammett常数有很强的相关性。它证明了环基团对聚集模式和排放行为的精确控制，阐明了潜在的调节。这项工作证明了环基团对聚集模式和发射行为的精确控制，阐明了潜在的调节机制，并强调了其对定制先进功能材料的重要性。

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引用次数: 0

Laser annealing enhances the color purity and thermal stability of Y2O3: Eu3+ fluorescent phosphors 激光退火提高了Y2O3: Eu3+荧光荧光粉的色纯度和热稳定性

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-05-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jlumin.2026.121782

Yong Tang , Jianwei Zhao , Yi Li , Yujing Wang , Guangqiu Zhang , Yihang Zhao , Lirong Qin

In this study, we demonstrate a synergistic approach combining hydrothermal synthesis with laser annealing to fabricate Y₂O₃:xEu³⁺ phosphors (x = 0.5, 1, 2, 5, 8, 10 %). When the doping concentration is 5 % Eu³⁺, the photoluminescence performance of the sample is the best, with the maximum emission intensity and a longer lifetime. The phosphor obtained by laser annealing, when excited by a 395 nm laser, emits light with a higher color purity than that obtained by traditional annealing; its thermal stability is also improved. Rietveld refinement confirms laser processing promotes preferential Eu³⁺ occupation at low-symmetry C₂ sites, optimizing electric dipole transitions. Meanwhile, both Fourier transform infrared spectroscopy and absorption spectroscopy tests have proved that the performance of the laser-annealed samples is higher than that of the samples annealed in the furnace. In conclusion, laser annealing can be used as a new method for preparing high-performance rare earth luminescent materials.

在这项研究中，我们展示了一种将水热合成与激光退火相结合的协同方法来制备Y2O3:xEu3+荧光粉（x = 0.5, 1,2,5,8,10 %）。当掺杂浓度为5% Eu3+时，样品的光致发光性能最好，发射强度最大，寿命更长。激光退火得到的荧光粉，在395 nm激光激发下，发出的光比传统退火得到的光具有更高的色纯度；其热稳定性也得到了改善。Rietveld细化证实，激光加工促进了低对称性C2位点的Eu3+优先占据，优化了电偶极子跃迁。同时，傅里叶变换红外光谱和吸收光谱测试都证明了激光退火样品的性能高于炉内退火样品。综上所述，激光退火可以作为制备高性能稀土发光材料的一种新方法。

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引用次数: 0

Engineered p-type AlGaN layer for enhanced deep ultraviolet light-emitting diodes performance 设计p型AlGaN层，增强深紫外发光二极管的性能

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-05-01 Epub Date: 2026-02-04 DOI: 10.1016/j.jlumin.2026.121788

Aiman Fatima, Muhammad Usman, Shazma Ali, Anis Naveed, Anuda Bibi, Haseena Noor

In this work, a wedge-shaped p-AlGaN layer (WPL) with bidirectional Al composition grading is introduced to overcome the limitations of conventional rectangular p-type AlGaN layer (CPL). The graded Al composition reduces the Mg acceptor activation energy, allowing a greater fraction of Mg dopants to ionize and thereby improving hole transport. Numerical simulations demonstrate that the proposed design increases the hole and electron concentrations in the active region by 7% and 4%, respectively, leading to a more uniform carrier distribution within the quantum wells. As a result, the radiative recombination rate is increased by 23%, and the internal quantum efficiency (IQE) is enhanced from 52% to 80.4%. These results highlight compositionally graded, wedge-shaped p-AlGaN layers as an effective design strategy for realizing high-performance AlGaN-based DUV LEDs.

本文提出了一种具有双向Al成分分级的楔形p-AlGaN层（WPL），以克服传统矩形p-AlGaN层（CPL）的局限性。梯度Al成分降低了Mg受体活化能，允许更大比例的Mg掺杂剂电离，从而改善空穴输运。数值模拟表明，所提出的设计使活性区的空穴和电子浓度分别提高了7%和4%，从而使量子阱内载流子分布更加均匀。结果表明，辐射复合率提高了23%，内量子效率（IQE）由52%提高到80.4%。这些结果强调了组成渐变的楔形p-AlGaN层是实现高性能algan基DUV led的有效设计策略。

引用次数: 0

Fast fabrication of all-inorganic monolithic phosphor ceramic module for reflection-type laser lighting 反射型激光照明用全无机单片荧光粉陶瓷模块的快速制备

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-05-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jlumin.2026.121779

Yu Yao , Xinrong Chen , Feng Wang , Heyu Wang , Bingguo Liu , Jian Xu , Baoli Du , Liqiang Ma , Aochen Du , Carsten Dam-Hansen , Ole B. Jensen

The development of ultra-high-brightness laser-driven phosphor-converted light sources is significantly challenged by high-power-density laser irradiation, primarily due to the thermal quenching effect induced by excessive heat accumulation in the phosphor. Conventional approaches aimed at improving the heat dissipation performance of phosphor converters, such as phosphor-in-glass (PiG) and ceramic plates, often requiring the use of attached substrates and thermal interface materials (TIMs), tend to be relatively complex and susceptible to delamination at the interfaces. Here, we proposed a fast, low-cost and TIM-free fabrication of monolithic ceramic-glass modules with integrated top YAG:Ce phosphor layer and bottom alumina layer (as substrate). In the fabricated modules, tight interfacial bonding without cracks was achieved between the phosphor layer and the alumina layer, which is attributed to their matched thermal expansion coefficients as well as a shared glass component. The effects of the phosphor layer’s thickness and glass ratio were examined with respect to the absorption of incident light and the subsequent heat dissipation, as the luminous efficacy is directly governed by the converter’s thermal management. Also, the effects of thickness and glass ratio of phosphor layer on fluorescent-emitting spot expansion (compared to laser spot) and luminous exitance were also investigated. This study not only provides a novel design of a phosphor module for laser lighting but also identifies the critical parameters for enhancing its photo-thermal performance to meet the demands of higher-power laser lighting applications.

高功率密度激光辐照对超高亮度激光驱动磷光转换光源的发展提出了重大挑战，这主要是由于磷光体中过多的热量积累引起的热猝灭效应。旨在改善荧光粉转换器散热性能的传统方法，如玻璃内磷（PiG）和陶瓷板，通常需要使用附加基板和热界面材料（TIMs），往往相对复杂，容易在界面处分层。在这里，我们提出了一种快速，低成本和无tim的单片陶瓷玻璃模块的制造方法，该模块集成了顶部YAG:Ce荧光粉层和底部氧化铝层（作为衬底）。在制造的模块中，荧光粉层和氧化铝层之间实现了紧密的界面结合，没有裂缝，这归因于它们匹配的热膨胀系数以及共享的玻璃组件。研究了荧光粉层厚度和玻璃比例对入射光的吸收和随后的散热的影响，因为光效直接由转换器的热管理决定。此外，还研究了荧光粉层厚度和玻璃化比对荧光光斑扩展（与激光光斑相比）和发光度的影响。该研究不仅为激光照明提供了一种新颖的荧光粉模块设计，而且确定了提高其光热性能的关键参数，以满足更高功率激光照明应用的需求。

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引用次数: 0

Highly twisted dual state emissive imidazole donor-acceptor fluorophore: Reversible halofluorochromism and structure controlled photostability 高度扭曲双态发射咪唑给受体荧光团：可逆的氟化荧光和结构控制的光稳定性

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-04-01 Epub Date: 2026-01-04 DOI: 10.1016/j.jlumin.2026.121746

R. Rameshbabu Priyadharsan , Sasikala Ravi , Elakkiya Sivakumar , Subramanian Karthikeyan , Mehboobali Pannipara , Abdullah G. Al-Sehemi , Dohyun Moon , Savarimuthu Philip Anthony

Dual state emissive imidazole derivatives, 4-(4,5-diphenyl-1H-imidazole-2-yl)-3,5-dimethoxy-N,N-diphenylaniline (Imi-B) and 3,5-dimethoxy-4-(1H-phenanthro[9,10-d]imidazole-2-yl)-N,N-diphenylaniline (Imi-P) were synthesized and investigated their photophysical and stimuli-responsive properties in solution as well as solid-state. Single crystal structural studies revealed highly twisted molecular conformation between triphenylamine phenyl and imidazole due to the presence of methoxy substituents. Imi-B and Imi-P showed strong solid-state fluorescence (quantum yield (ϕ_f) = 22.03 and 12.4 %) at 435 and 456 nm, respectively. Both Imi-B and Imi-P also displayed strong fluorescence in solvents with different polarity (ϕ_f = 0.07 to 0.53 compared to quinine sulphate standard). The presence of acid-responsive nitrogen functionality was utilized to demonstrate pH dependent reversible fluorescence switching in solution as well as solid-state. In solids, Imi-B showed red shifting of fluorescence with strong reduction of intensity whereas Imi-P displayed only red shifting of emission upon trifluoroacetic acid (TFA) exposure. In contrast, both molecules showed significant reduction of intensity with red shifting of emission in solution by TFA exposure. The fluorescence was perfectly reversed to initial state by NH₃ exposure in solution compared to the solid-state. The photostability studies revealed strong reduction of fluorescence intensity and appearance of new absorption for Imi-B. But Imi-P displayed good stability and did not show significant change over 80 min UV exposure. Thus, the conformation of integrating phenyl substituents in the imidazole units significantly influenced on the photostability of imidazole derivatives.

合成了咪唑双态发射衍生物4-（4,5-二苯基- 1h -咪唑-2-基）-3,5-二甲氧基- n， n -二苯基苯胺（Imi-B）和3,5-二甲氧基-4-（1h -菲唑[9,10-d]咪唑-2-基）- n， n -二苯基苯胺（Imi-P），并研究了它们在溶液和固态中的光物理和刺激响应性能。单晶结构研究表明，由于甲氧基取代基的存在，三苯胺苯基和咪唑之间存在高度扭曲的分子构象。在435 nm和456nm处，Imi-B和Imi-P表现出较强的固态荧光（量子产率（ϕf）分别为22.03和12.4%）。Imi-B和Imi-P在不同极性的溶剂中也显示出很强的荧光（与硫酸奎宁标准相比，ϕ = 0.07 ~ 0.53）。利用酸响应氮功能的存在来证明溶液和固态中pH依赖的可逆荧光开关。在固体中，Imi-B在三氟乙酸（TFA）暴露下表现出荧光红移和强度的强烈降低，而Imi-P仅表现出发射红移。相比之下，这两种分子暴露在TFA溶液中都表现出明显的强度降低和发射红移。与固态相比，NH3暴露在溶液中的荧光完全逆转到初始状态。光稳定性研究表明，Imi-B的荧光强度明显降低，并出现新的吸收。但Imi-P表现出良好的稳定性，在紫外线照射80分钟后没有明显变化。因此，在咪唑基上整合苯基取代基的构象对咪唑衍生物的光稳定性有显著影响。

{"title":"Highly twisted dual state emissive imidazole donor-acceptor fluorophore: Reversible halofluorochromism and structure controlled photostability","authors":"R. Rameshbabu Priyadharsan , Sasikala Ravi , Elakkiya Sivakumar , Subramanian Karthikeyan , Mehboobali Pannipara , Abdullah G. Al-Sehemi , Dohyun Moon , Savarimuthu Philip Anthony","doi":"10.1016/j.jlumin.2026.121746","DOIUrl":"10.1016/j.jlumin.2026.121746","url":null,"abstract":"<div><div>Dual state emissive imidazole derivatives, 4-(4,5-diphenyl-1H-imidazole-2-yl)-3,5-dimethoxy-N,N-diphenylaniline (<strong>Imi-B</strong>) and 3,5-dimethoxy-4-(1H-phenanthro[9,10-d]imidazole-2-yl)-N,N-diphenylaniline (<strong>Imi-P</strong>) were synthesized and investigated their photophysical and stimuli-responsive properties in solution as well as solid-state. Single crystal structural studies revealed highly twisted molecular conformation between triphenylamine phenyl and imidazole due to the presence of methoxy substituents. <strong>Imi-B</strong> and <strong>Imi-P</strong> showed strong solid-state fluorescence (quantum yield (ϕ<sub>f</sub>) = 22.03 and 12.4 %) at 435 and 456 nm, respectively. Both <strong>Imi-B</strong> and <strong>Imi-P</strong> also displayed strong fluorescence in solvents with different polarity (ϕ<sub>f</sub> = 0.07 to 0.53 compared to quinine sulphate standard). The presence of acid-responsive nitrogen functionality was utilized to demonstrate pH dependent reversible fluorescence switching in solution as well as solid-state. In solids, <strong>Imi-B</strong> showed red shifting of fluorescence with strong reduction of intensity whereas <strong>Imi-P</strong> displayed only red shifting of emission upon trifluoroacetic acid (TFA) exposure. In contrast, both molecules showed significant reduction of intensity with red shifting of emission in solution by TFA exposure. The fluorescence was perfectly reversed to initial state by NH<sub>3</sub> exposure in solution compared to the solid-state. The photostability studies revealed strong reduction of fluorescence intensity and appearance of new absorption for <strong>Imi-B</strong>. But <strong>Imi-P</strong> displayed good stability and did not show significant change over 80 min UV exposure. Thus, the conformation of integrating phenyl substituents in the imidazole units significantly influenced on the photostability of imidazole derivatives.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121746"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature dependence of Quasi-white-light emission in one-dimensional hybrid material (C12H18N)PbBr3 一维杂化材料（C12H18N）PbBr3准白光发射的温度依赖性

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-04-01 Epub Date: 2026-01-05 DOI: 10.1016/j.jlumin.2026.121748

Yassmin Kessentini , Iskandar Chaabane , Kawthar Abid , Ali Ben Ahmed , Habib Feki

Organic-inorganic hybrid materials have the potential of providing excellent properties and promising novel optical properties. This work focuses on the white light emission process of one-dimensional (1D) organic-inorganic perovskite (C₁₂H₁₈N)PbBr₃ abbreviated as 4BPP[PbBr₃]. Contrary to most organic-inorganic hybrid material, where the organic moieties act as barriers and the inorganic part play the role of quantum well, both organic and inorganic parts in 4BPP[PbBr₃] are optically active, giving rise to a strong and large emission band covering a wide range of the visible spectrum that can be seen even with the naked eye at room temperature. The photoluminescence spectrum is composed of three bands located at 490 nm (P1), 550 nm (P2) and 600 nm (P3). The first and the second bands are attributed respectivelyto

π - π^{*}

and intra-molecular charge transfer transition within the 4BPP organic cation whereas the third band is related to the inorganic Wannier exciton confined in lead bromide PbBr₃ chains. This result was supported by density functional theory calculation. Moreover, the temperature dependence of the PL emission for each transition reveals a different behaviour. In fact, a negative thermal quenching (NTQ) is observed for P1 evolution at low temperature. This NTQ emission is interpreted in terms of transitions between excitonic states involving an exciton-phonon interaction. The P2 observed emission behavior is explained by a charge carrier transfer mechanism between two quantum dots population and the P3 temperature quenching was explained by an increased level of non radiative recombination caused by the phonon vibration (80 cm⁻¹) which corresponds well to Pb-Br stretching vibration observed in Raman spectra.

有机-无机杂化材料具有优异的性能和前景广阔的新型光学性能。本文主要研究一维（1D）有机-无机钙钛矿（C12H18N）PbBr3（简称4BPP[PbBr3]）的白光发射过程。与大多数有机-无机杂化材料相反，其中有机部分充当屏障，无机部分发挥量子阱的作用，4BPP[PbBr3]中的有机和无机部分都具有光学活性，产生强大而大的发射带，覆盖了宽广的可见光谱范围，即使在室温下也可以用肉眼看到。光致发光光谱由位于490 nm （P1）、550 nm （P2）和600 nm （P3）的三个波段组成。第一能带和第二能带分别归因于π−π *和4BPP有机阳离子内的分子内电荷转移跃迁，而第三能带与局限在溴化铅PbBr3链中的无机万尼尔激子有关。该结果得到了密度泛函理论计算的支持。此外，每个跃迁的PL发射的温度依赖性揭示了不同的行为。事实上，在低温下P1的演化存在负热猝灭（NTQ）。这种NTQ发射被解释为涉及激子-声子相互作用的激子态之间的跃迁。P2的发射行为可以用两个量子点之间的电荷载流子转移机制来解释，P3的温度猝灭可以用声子振动（80 cm−1）引起的非辐射复合水平的增加来解释，这与拉曼光谱中观察到的Pb-Br拉伸振动很好地对应。

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引用次数: 0

Fluorescence thermometry utilizing ambient light via energy transfer progression 荧光测温利用环境光通过能量转移过程

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-04-01 Epub Date: 2025-12-31 DOI: 10.1016/j.jlumin.2025.121732

Shuai He , Shuang Zheng , Yubo Lin , Liangliang Zhang , Xuanli Wang , Xiaobo Yu , Qian Guan , Luomeng Chao , Jun Qiao , Yonghong Ma

Optical thermometry based on temperature-dependent luminescent parameters, such as the luminescent intensity ratio (LIR), offers non-contact operation and high resolution but often requires complex excitation systems. This study presents a broadband near-infrared (NIR)-emitting phosphor, Gd_2.4Lu_0.6Ga₄AlO₁₂ (GLGA): Cr³⁺, xYb³⁺, which can be directly excited by ambient light, thereby significantly simplifying the measurement setup by eliminating the need for an external light source. The material exhibits an emission spectrum covering 650–1050 nm and demonstrates remarkable temperature-dependent characteristics over the 303–483 K range. By leveraging energy transfer between Cr³⁺ and Yb³⁺ and their distinct thermal quenching behaviors, the LIR of Yb³⁺ to Cr³⁺ emission is established as a reliable temperature probe. A maximum relative sensitivity of 0.5 % K⁻¹ is achieved at 423 K for the sample with x = 0.20. Practical applicability is verified using phosphor-embedded silicone elastomers, which enable accurate temperature sensing under various ambient light conditions (sunlight, cloudy day, and indoor lighting). This work confirms the great potential of visible-light-excited NIR-emitting materials in ambient-light-activated fluorescence thermometry.

光学测温基于温度相关的发光参数，如发光强度比（LIR），提供非接触操作和高分辨率，但往往需要复杂的激发系统。本研究提出了一种宽带近红外（NIR）发光荧光粉Gd2.4Lu0.6Ga4AlO12 (GLGA): Cr3+, xYb3+，它可以被环境光直接激发，从而大大简化了测量设置，无需外部光源。该材料的发射光谱覆盖650-1050 nm，在303-483 K范围内具有显著的温度依赖性。利用Cr3+和Yb3+之间的能量传递及其不同的热猝灭行为，建立了Yb3+对Cr3+发射的LIR作为可靠的温度探头。在423 K时，对于x = 0.20的样品，最大相对灵敏度为0.5% K−1。使用嵌入磷的有机硅弹性体验证了实用性，该弹性体可以在各种环境光条件下（阳光，阴天和室内照明）实现精确的温度传感。这项工作证实了可见光激发nir发射材料在环境光激活荧光测温中的巨大潜力。

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引用次数: 0

Wafer-scale hybrid integration of Micro-LED arrays with ultra-small pixels on Si platform 硅平台上超小像素微led阵列的晶圆级混合集成

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-04-01 Epub Date: 2025-12-22 DOI: 10.1016/j.jlumin.2025.121717

Feng Xu , XiangDong Meng , YuXiong Xue , ZiLi Xie , GuoHao Yu , BaoShun Zhang

GaN-based micro-light-emitting-diode (Micro-LED) arrays on Silicon (Si) platform with 4-μm-diameter ultra-small pixels is realized using a novel wafer-scale hybrid integration strategy by which the pixel-to-pixel electrical isolation is obtained by specialized ion treatment process, and the opto-electrical characteristics of the ion-treated Micro-LED arrays fabricated by different conditions are investigated to clarify the luminescence mechanisms. The results confirmed that a better balance between the electrical isolation and luminescence efficiency can be achieved via optimizing the fabrication conditions related to the ion treatment pixelation. Extensive analysis based on a room-temperature reference-point method (RTRM) further reveals that the dislocation decorating mechanism in InGaN/GaN multiple quantum wells is weakened by higher temperature annealing, which increases the nonradiative recombination and reduces internal quantum efficiency (η_IQE) markedly. The successful hybrid integration of the ion-treated Micro-LED arrays with a Si platform exhibits a great potential for cost-effective mass production of the high performance active-matrix microdisplay applications.

采用一种新的晶圆级混合集成策略，在直径为4 μm的超小像素硅（Si）平台上实现了gan基微发光二极管（Micro-LED）阵列，该策略通过特殊的离子处理工艺实现了像素间的电隔离，并研究了不同条件下离子处理的微发光二极管阵列的光电特性，以阐明其发光机理。结果证实，通过优化与离子处理像素化相关的制造条件，可以在电隔离和发光效率之间取得更好的平衡。基于室温参考点法（RTRM）的广泛分析进一步表明，高温退火削弱了InGaN/GaN多量子阱中的位错装饰机制，增加了非辐射复合，显著降低了内量子效率（ηIQE）。离子处理微led阵列与硅平台的成功混合集成显示出高性能有源矩阵微显示应用的巨大潜力。

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引用次数: 0

Multimodal and color-tunable luminescence in CaZnOS:Eu3+,Pr3+ phosphors CaZnOS:Eu3+，Pr3+荧光粉的多模态和颜色可调发光

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence

Pub Date : 2026-04-01 Epub Date: 2026-01-04 DOI: 10.1016/j.jlumin.2026.121745

Sarfraz Ahmad , Shulong Chang , Fuhang Jiao , Yuan Deng , Xiang Li , Junlu Sun , Ying Xiao , Lin Dong

With the growing demands for multilayered security and advanced anti-counterfeiting technologies, luminescent materials capable of multimodal excitation and color tuning are increasingly vital. Here, we report the solid-state synthesis of CaZnOS-based phosphors co-doped with Eu³⁺ and Pr³⁺, enabling excitation- and stress-dependent emission across a broad chromatic range. Systematic variation of Pr³⁺ concentration, with Eu³⁺ fixed at 1.5 %, revealed broad photoluminescence spanning red to bluish-green under UV excitation (290–490 nm) and mechanoluminescence with force-induced color evolution from red to green. Temperature-dependent PL further demonstrated clear thermochromic responses, particular in CaZnOS:1.5 %Eu³⁺,1 %Pr³⁺. Practical demonstrations in color-tunable handwriting and anticounterfeiting labels underscore the versatility of these phosphors in secure and interactive optical applications. The combination of remarkable color-tuning capability, robust mechanoluminescent performance, and thermal stability positions CaZnOS:Eu³⁺,Pr³⁺ as an ideal platform for next-generation e-signatures, security features, and integrated optoelectronic devices.

随着人们对多层安全性和先进防伪技术的需求日益增长，具有多模态激发和颜色调谐功能的发光材料变得越来越重要。在这里，我们报道了与Eu3+和Pr3+共掺杂的caznos基荧光粉的固态合成，使激发和应力依赖的发光在宽的色范围内。Pr3+浓度系统变化时，Eu3+固定在1.5%，在紫外激发下（290-490 nm）显示出从红色到蓝绿色的广泛光致发光，并在力诱导下从红色到绿色演变为机械发光。温度依赖性PL进一步表现出明显的热致变色反应，特别是在CaZnOS: 1.5% Eu3+， 1% Pr3+中。可调色手写和防伪标签的实际演示强调了这些荧光粉在安全和交互式光学应用中的多功能性。卓越的调色能力、强大的机械发光性能和热稳定性使CaZnOS:Eu3+、Pr3+成为下一代电子签名、安全功能和集成光电器件的理想平台。

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引用次数: 0