Journal of Luminescence最新文献

{"title":"Luminescence properties of composite of Mn-doped magnesium aluminosilicate and aluminogermanate","authors":"Hiroyuki Fukushima ,&nbsp;Hiromi Kimura ,&nbsp;Kaho Taniguchi ,&nbsp;Yosuke Hirano ,&nbsp;Kazuki Matsuta","doi":"10.1016/j.jlumin.2025.121522","DOIUrl":"10.1016/j.jlumin.2025.121522","url":null,"abstract":"<div><div>Composites of 1 % Mn-doped magnesium aluminosilicate and aluminogermanate were synthesized by the conventional sintering method, and the luminescence properties including photoluminescence, radioluminescence, and thermally stimulated luminescence were investigated. The photoluminescence spectra of composites showed the broad and sharp emission peaks at around 650 nm due to Mn²⁺ and Mn⁴⁺. The radioluminescence and thermally stimulated luminescence spectra of the synthesized samples showed only the broad emission peak at around 650 nm. The X-ray image by thermally stimulated luminescence was clearly observed using synthesized composites.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121522"},"PeriodicalIF":3.6,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047066","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}

{"title":"Molecule-matrix-exciton synergistic regulation for efficient TS-FRET multicolor organic room-temperature phosphorescent materials: Photo-Stimuli responsiveness and anti-counterfeiting applications","authors":"Yujiao Luo ,&nbsp;Yuman Li ,&nbsp;Yujiao Zhang ,&nbsp;Jie Zhao ,&nbsp;Lei Xue ,&nbsp;Jian Wang ,&nbsp;Wei Shen","doi":"10.1016/j.jlumin.2025.121527","DOIUrl":"10.1016/j.jlumin.2025.121527","url":null,"abstract":"<div><div>The development of organic room-temperature phosphorescence (RTP) materials featuring long-lived emission, color-tunability, and stimuli-responsiveness is critical for advanced anti-counterfeiting technologies. This study innovatively proposes a \"molecule-matrix-exciton synergistic regulation\" strategy to fabricate high-performance, photo-stimuli-responsive multicolor RTP systems. First, carbazole dimer isomers (3,3-CZ/3,9-CZ/2,9-CZ) were selected as luminophores via molecular engineering. Their planar conformation differences and variable hydrogen-bonding sites synergistically stabilized triplet excitons, while poly (vinyl alcohol) (PVA) matrix provided a rigid environment through doping. The 3,3-CZ@PVA film demonstrated exceptional RTP performance, achieving an ultralong phosphorescence lifetime of 1.91 s, a high quantum yield of 39.86 %, and pattern memory retention exceeding 120 h. Second, an efficient triplet-to-singlet Förster resonance energy transfer (TS-FRET) system was constructed. Long-lived RTP donors transferred energy to fluorescent dyes (sodium fluorescein, Fluo; rhodamine B, RhB), enabling precise afterglow color tuning from blue/cyan to green/red. Notably, the RhB/3,3-CZ@PVA 5 % system exhibited an energy transfer efficiency of up to 99.6 %. Furthermore, UV-light-controlled afterglow switching and dynamic pattern storage/erasure were realized via a ³O₂→¹O₂ photoconversion mechanism. By modulating acceptor ratios, anti-counterfeiting labels with lifetime gradients and broad color gamut adjustability were developed, enabling advanced applications such as time-dependent pattern display and dynamic digital encryption. Through multidimensional molecule-matrix-exciton synergy, this work overcomes the limitations of conventional amorphous organic RTP materials, establishing a robust foundation for high-performance, scalable photo-stimuli-responsive multicolor phosphors in intelligent anti-counterfeiting and information encryption.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121527"},"PeriodicalIF":3.6,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057266","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}

{"title":"Tunable visible luminescence from Tb3+/Fe3+ co-doped LiAl5O8 under UV and X-ray excitation","authors":"Ariosvaldo J.S. Silva ,&nbsp;Eralci M. Therézio ,&nbsp;Luis Craco ,&nbsp;Iure da S. Carvalho ,&nbsp;Patresio A.M. Nascimento ,&nbsp;Wellisson S. Silveira ,&nbsp;Marcos V. dos S. Rezende","doi":"10.1016/j.jlumin.2025.121497","DOIUrl":"10.1016/j.jlumin.2025.121497","url":null,"abstract":"<div><div>In this work, we report the synthesis and optical characterization of LiAl₅O₈ co-doped with Tb³⁺ and Fe³⁺ ions, aiming to investigate tunable visible luminescence under different excitation conditions. The samples were prepared using the sol-gel method, with glucose as the chelating agent. Photoluminescence (PL) responses were analyzed under ultraviolet excitation at 215 nm and 270 nm, while X-ray-excited optical luminescence (XEOL) was investigated under excitation at the L<span><math><msub><mrow></mrow><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></msub></math></span>-edge of Tb³⁺ (7520 eV). The results show that co-doping enables effective control of the emission color, with green and red contributions from Tb³⁺ and Fe³⁺ ions, respectively, confirming the potential of Fe³⁺ as a red-emitting center in co-doped systems for tunable luminescence applications. The evolution of chromaticity coordinates (<em>x</em>, <em>y</em>) and correlated color temperature (<span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>) was evaluated using CIE 1931 diagrams. Emission tones ranged from warm white to orange under 215 nm excitation, indicating potential for white light-emitting diode (WLED) applications, and shifted from green to intense red under 7520 eV excitation. These findings demonstrate that all samples exhibit visible luminescence under both near-ultraviolet and X-ray excitation, confirming their potential for application in solid-state lighting devices and scintillator materials.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121497"},"PeriodicalIF":3.6,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020086","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}

{"title":"Quantum extension of the Judd–Ofelt theory: Static dipole effects with application to Eu3+ in water","authors":"Adelmo S. Souza ,&nbsp;Jorge L.O. Santos ,&nbsp;Vinicius Coelho ,&nbsp;J.D.L. Dutra ,&nbsp;Heveson Lima","doi":"10.1016/j.jlumin.2025.121520","DOIUrl":"10.1016/j.jlumin.2025.121520","url":null,"abstract":"<div><div>We propose a quantum extension of the Judd–Ofelt (JO) theory to include static dipole contributions in the description of 4f→4f electric dipole transitions. By treating the Ln³⁺ ion and its ligand environment as a unified quantum system, our approach unifies the conventional JO and Dynamic Coupling (DC) formalisms. The model is applied to Eu³⁺ in aqueous solution, where water molecules possess permanent dipole moments. Experimental and computational results show that only the ⁵D₀→⁷F₂ transition intensity increases with NO₃⁻ concentration, despite the anion not entering the first hydration shell. This effect is attributed to enhanced long-range dipolar fields, which selectively influence the Ω₂ parameter. The findings highlight the role of static dipoles in modulating hypersensitive transitions and offer a refined framework for interpreting luminescence in complex environments.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121520"},"PeriodicalIF":3.6,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047068","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}

{"title":"Combined 5d–4f and 4f–4f luminescence of Pr3+ ion under tribo- and X-ray excitation in anhydrous praseodymium(III) sulfate crystals","authors":"Adis A. Tukhbatullin,&nbsp;Nadezhda A. Panova,&nbsp;Glyus L. Sharipov","doi":"10.1016/j.jlumin.2025.121525","DOIUrl":"10.1016/j.jlumin.2025.121525","url":null,"abstract":"<div><div>Combined 5d–4f and 4f–4f luminescence of Pr³⁺ ions was discovered in anhydrous praseodymium(III) sulfate crystals under both mechanical and X-ray excitation. The X-ray excited luminescence and triboluminescence spectra exhibit intense broad bands in the UV region (215–350 nm), corresponding to 4f¹5 d¹ → 4f² transitions, along with weaker bands in the visible range (485–725 nm) attributed to intra-4f-shell transitions. The emission spectra are identical to the photoluminescence spectrum of the anhydrous crystals, indicating that the same transitions occur regardless of the excitation mechanism. The measured PL quantum yields were 73 % for 5d–4f transitions and 0.36 % for 4f–4f transitions, with corresponding excited-state lifetimes of 18 ns and 335 ns, respectively. Excitation efficiencies for 5d–4f transitions (⁴f₁5d₁ → ⁴f₂) and 4f–4f transitions (from multiplets ³P_{0, 1} and ¹D₂ to multiplets ³H_4,5,6 and ³F_2,3,4) were compared. It was found that in X-ray excited luminescence and triboluminescence for Pr³⁺ ion the excitation of 4f–4f transitions is noticeably more efficient than the excitation of 5d–4f transitions.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121525"},"PeriodicalIF":3.6,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047110","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}

{"title":"Extraction and analysis of temperature-induced intrinsic absorption changes in the charge transfer band of YVO4","authors":"Lixin Peng ,&nbsp;Zhoulin Ding ,&nbsp;Zhiguo Zhang","doi":"10.1016/j.jlumin.2025.121519","DOIUrl":"10.1016/j.jlumin.2025.121519","url":null,"abstract":"<div><div>The real temperature-dependent variation in the absorption of the charge transfer band (CTB) is obscured due to its presence in the photoluminescence excitation (PLE) spectrum. To address this, a method based on the steady-state rate equation was developed to extract the intrinsic absorption of the CTB. The temperature-dependent absorption spectra of CTB in VO₄³⁻ groups were obtained by analyzing temperature-dependent photoluminescence (PL) spectra, PLE spectra, time-resolved spectra of YVO₄, and the spectrum of a xenon (Xe) lamp. The results reveal that, in contrast to the changes in the PLE spectra of YVO₄, the absorption of CTB increases with temperature in the absorption spectra, and the total absorption change of CTB with temperature in YVO₄ follows the Boltzmann distribution law. This work offers a new optical framework for CTB absorption analysis, potentially supporting the design of temperature-sensitive optical materials and devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121519"},"PeriodicalIF":3.6,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027442","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}

{"title":"Illuminating stability and spectral shifts: A DFT+U study of Eu-doped ZnWO4 for visible-light optoelectronics","authors":"Muhammad Tayyab ,&nbsp;Sikander Azam ,&nbsp;Qaiser Rafiq ,&nbsp;Vineet Tirth ,&nbsp;Ali Algahtani ,&nbsp;Amin Ur Rahman ,&nbsp;Syed Sheraz Ahmad ,&nbsp;M. Tahir Khan","doi":"10.1016/j.jlumin.2025.121511","DOIUrl":"10.1016/j.jlumin.2025.121511","url":null,"abstract":"<div><div>Tungstate-based oxides have attracted significant attention owing to their excellent structural stability, chemical robustness, and versatile optical properties, making them suitable for next-generation optoelectronic and phosphor applications. Among these, ZnWO₄ has emerged as a promising host matrix; however, the role of europium (Eu) substitution in modulating its optoelectronic behavior remains underexplored. In this work, we employ spin-polarized density functional theory (DFT) within the GGA + U framework to investigate the structural, electronic, and optical properties of pristine ZnWO₄ and Eu-doped ZnWO₄ systems. Phonon dispersion analysis confirms dynamical stability for both pristine and doped structures. Eu doping reduces the bandgap, introduces new localized states near the Fermi level, and significantly alters the density of states, thereby enhancing electronic transitions. The optical response reveals a broadened dielectric function, red-shifted absorption edge, and intensified extinction coefficient, consistent with the presence of Eu 4f states. Additionally, reflectivity and energy-loss spectra indicate improved photon–phonon coupling and optical tunability upon doping. These findings highlight that Eu incorporation not only stabilizes the ZnWO₄ lattice but also tailors its optoelectronic features, positioning Eu-doped ZnWO₄ as a potential candidate for white-light-emitting diodes (w-LEDs) and related optoelectronic technologies.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121511"},"PeriodicalIF":3.6,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047104","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}

{"title":"High-resolution optical spectroscopy of europium nitrate hexahydrate crystals","authors":"Federico Chiossi,&nbsp;Diana Serrano,&nbsp;Alexey Tiranov,&nbsp;Philippe Goldner","doi":"10.1016/j.jlumin.2025.121500","DOIUrl":"10.1016/j.jlumin.2025.121500","url":null,"abstract":"<div><div>We report the optical study of europium nitrate hexahydrate crystals Eu(NO₃)<span><math><mmultiscripts><mrow><mo>⋅</mo></mrow><mprescripts></mprescripts><mrow><mn>3</mn></mrow><none></none></mmultiscripts></math></span> 6H₂O and their deuterated version Eu(NO₃)<span><math><mmultiscripts><mrow><mo>⋅</mo></mrow><mprescripts></mprescripts><mrow><mn>3</mn></mrow><none></none></mmultiscripts></math></span> 6D₂O conducted at 50 mK. The crystals show sub-GHz inhomogeneous linewidths for the <span><math><mmultiscripts><mrow><mi>F</mi></mrow><mrow><mn>0</mn></mrow><none></none><mprescripts></mprescripts><none></none><mrow><mn>7</mn></mrow></mmultiscripts><msup><mrow><mo>↔</mo></mrow><mrow><mn>5</mn></mrow></msup><msub><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> transition and optical coherence times up to 136 μs for the non-deuterated crystal and 750 μs for the deuterated one. In addition, using the spectral hole burning technique, the hyperfine splittings in the absence of an external field have been estimated for the ground and optical levels. These results suggest that rare-earth nitrate crystals could represent a promising class of materials for quantum information applications as well as for fundamental physics experiments requiring narrow optical transitions and good coherence properties.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121500"},"PeriodicalIF":3.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020085","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}

{"title":"High-sensitivity optical thermometer enabled by Yb3+-Sensitized upconversion in tungsten bronze-type KCaAl2F9:Er3+/Ho3+ phosphors","authors":"Xueqing Guo ,&nbsp;Dongxi Liu ,&nbsp;Dongyu Ai ,&nbsp;Hengjuan Deng ,&nbsp;Yu Liu ,&nbsp;Xinxin Han ,&nbsp;Li Chen ,&nbsp;Bingsuo Zou","doi":"10.1016/j.jlumin.2025.121518","DOIUrl":"10.1016/j.jlumin.2025.121518","url":null,"abstract":"<div><div>Non-contact fluorescent temperature sensing has garnered significant attention in the fields of life sciences and medicine owing to its non-invasive operation with deep tissue penetration and minimal autofluorescence interference through near-infrared excitation with enhanced sensitivity. In this work, we report a tungsten bronze-type KCaAl₂F₉ (KCAF) host co-doped with Yb³⁺-Er³⁺/Ho³⁺ ions, which achieved intense visible upconversion luminescence (UCL) under 980 nm excitation. This arises from efficient energy transfer from Yb³⁺ sensitizers to Er³⁺/Ho³⁺ activators within the unique crystal field environment. Through systematic optimization of lanthanide ion concentrations, we engineered three distinct fluorescence intensity ratio thermometric channels: (1) FIR₁ (<em>I</em>_{521 nm}/<em>I</em>_{538 nm}, Er³⁺), (2) FIR₂ (<em>I</em>_{654 nm}/<em>I</em>_{536 nm}, Ho³⁺), and (3) FIR₃ (<em>I</em>_{654 nm}/<em>I</em>_{748 nm}, Ho³⁺). The optimized KCAF:Yb³⁺, Er³⁺ phosphor achieves a maximum relative sensitivity (<em>S</em>_r) of 1.0271 % K⁻¹ (FIR₁) at 298 K, while KCAF:Yb³⁺, Ho³⁺ demonstrates <em>S</em>_r of 0.4193 % K⁻¹ (FIR₂) and 1.4488 % K⁻¹ (FIR₃) at 298 K, surpassing over 50 % of the reported rare earth-based optical thermometers. Furthermore, power-dependent spectral evolution reveals tunable green emission purity through controlled cross-relaxation processes, enabling multifunctional applications in solid-state lighting technologies and high-performance optoelectronics. These results suggest the KCAF:Yb³⁺, Er³⁺/Ho³⁺ phosphor as a promising candidate for advanced optical sensors in precision medicine and industrial process monitoring.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121518"},"PeriodicalIF":3.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027441","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}

{"title":"Photoluminescence and thermal behavior of Pb2+-Doped CaMgB2O5: A candidate phosphor for UV-LED technology","authors":"Ali Sadi Başak","doi":"10.1016/j.jlumin.2025.121507","DOIUrl":"10.1016/j.jlumin.2025.121507","url":null,"abstract":"<div><div>Phosphors with the composition Ca_1-xPb_xMgB₂O₅ (0.0025 ≤ x ≤ 0.03) were synthesized at 900 °C for 6 h in an air atmosphere via a solution combustion method. The phase composition of all synthesized borates was confirmed by powder X-ray diffraction (XRD) and the diffraction peaks matched with the standard card of CaMgB₂O₅ (JCPDS–0 73–0618). The bond structure and morphological characteristics of CaMgB₂O₅ were examined using Fourier Transform Infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. Photoluminescence properties were investigated at room temperature, revealing excitation and emission bands at 271 nm and 341 nm, respectively, for CaMgB₂O₅:Pb²⁺. The optimal Pb²⁺ concentration for maximum emission intensity was determined as 0.01 mol. A large Stokes shift of 7575 cm⁻¹ was observed, indicating strong electron–phonon coupling and reduced reabsorption losses. Thermal analysis (TGA/DSC) demonstrated high thermal stability above 900 °C. The combination of strong near-UV emission, thermal robustness, and the use of waste-derived Pb²⁺ sources makes this phosphor a promising candidate for UV-LEDs, germicidal lighting, photochemical excitation, and other solid-state lighting applications. This study introduces a novel, sustainable UV-emitting borate material to the literature with potential for high-performance optoelectronic devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"288 ","pages":"Article 121507"},"PeriodicalIF":3.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047109","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}