Journal of Luminescence最新文献

{"title":"Synthesis and scintillation properties of Tb3+-Activated tellurite glass-ceramics","authors":"Xin Luo ,&nbsp;Zhi Hong ,&nbsp;Dechen Li ,&nbsp;Hailan Hou ,&nbsp;Weixiong You ,&nbsp;Jianhui Huang","doi":"10.1016/j.jlumin.2025.121424","DOIUrl":"10.1016/j.jlumin.2025.121424","url":null,"abstract":"<div><div>In this study, Tb³⁺-doped tellurite-germanate glass-ceramics containing BaGdF₅ nanocrystals were successfully fabricated via the construction of a Gd³⁺- Tb³⁺ energy transfer system. The microstructure and optical properties were systematically investigated. Through characterization techniques including DTA, XRD, and SEM, the optimal heat treatment condition was determined to be 880 °C for 1 h, under which BaGdF₅ nanocrystals homogeneously precipitated in the glass matrix. Under 378 nm ultraviolet excitation, the glass-ceramics exhibited intense green emission at 545 nm, with a luminescence intensity approximately 100 % higher than that of the precursor glass. X-ray excited luminescence (XEL) tests revealed that the optimized glass-ceramics achieved an integral emission intensity of 72.6 % compared to a commercial BGO crystal. Moreover, the sample demonstrated excellent radiation stability, with only a 20 % decrease in luminescence intensity after 180 min of continuous X-ray irradiation. This study confirms that the Tb³⁺-doped tellurite-germanate glass-ceramics combine high luminescence efficiency with superior radiation resistance, showing significant potential for applications in slow-event X-ray detection.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121424"},"PeriodicalIF":3.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666012","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":"Short-chain ligand synthesis of ytterbium-doped CsPbCl3 perovskite nanocrystals","authors":"Naqing Wang ,&nbsp;Qixin Huang ,&nbsp;Zhehong Zhou ,&nbsp;Shaojun Wang ,&nbsp;Tao Pang ,&nbsp;Lingwei Zeng ,&nbsp;Daqin Chen","doi":"10.1016/j.jlumin.2025.121425","DOIUrl":"10.1016/j.jlumin.2025.121425","url":null,"abstract":"<div><div>Synthesis of lanthanide-doped perovskite nanocrystals generally utilizes long-chain ligands like oleylamine and oleic acid at high temperatures up to 260 °C. To tackle this issue, we develop a strategy (temperatures down to 170 °C) to fabricate ytterbium (Yb³⁺)-doped CsPbCl₃ perovskite nanocrystals using the octylamine ligand benefited from its low boiling point and short carbon chain. The as-prepared Yb³⁺-doped CsPbCl₃ perovskite nanocrystals can yield both violet luminescence assigned to exciton recombination and near-infrared emission ascribed to Yb³⁺: ²F_5/2 → ²F_7/2. Structural and spectroscopic characterizations evidence that energy transfer from CsPbCl₃ to Yb³⁺ and from defect states to Yb³⁺ are simultaneously responsible for the observed Yb³⁺ luminescence with quantum yield of 49.5 %. Femtosecond transient absorption spectra confirm that the transferring time scale is within 100 ps, which is much faster than the photoluminescent decay lifetimes of 3000 ps, enabling efficient CsPbCl₃-to-Yb³⁺ energy transfer and thus Yb³⁺ luminescence.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121425"},"PeriodicalIF":3.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666010","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":"Yb3+/ Er3+ co-doped KBaGd(MoO4)3 luminescent materials: structure, UC luminescence and optical thermometry","authors":"J. Song ,&nbsp;J.G. Zhou ,&nbsp;G.H. Chen","doi":"10.1016/j.jlumin.2025.121420","DOIUrl":"10.1016/j.jlumin.2025.121420","url":null,"abstract":"<div><div>Developing high-performance rare earths activated luminescent materials for optical thermometer and other display devices has been a prominent research topic. This study utilized a conventional solid-state method to prepare KBaGd(MoO₄)₃: Yb³⁺, Er³⁺ phosphors. A comprehensive analysis of the structural characteristics, morphological features, and emission spectrum behaviors was conducted through XRD, SEM, and fluorescence spectroscopy measurements. Upon 980 nm excitation, the obtained samples displayed pronounced up-conversion (UC) luminescence characteristics, featuring characteristic green (530/552 nm) and red (670 nm) emission bands corresponding to Er³⁺ transitions. Employing the distinct thermal responses of Er³⁺ Stark sublevels, a monocentric optical thermometer was developed through FIR analysis of thermally coupled transitions (²H_11/2/⁴S_3/2 and ²H_11/2/⁴F_9/2), enabling dual-channel non-contact temperature detection within a unified emitter system. This phosphor possessed <em>S</em>_r-max of 2.15 % K⁻¹@298K and <em>S</em>_a-max of 2.04 % K⁻¹@573K. More importantly, the phosphor exhibited excellent thermal stability, which is beneficial for achieving high-precision temperature measurements. Experimental evidence confirms the Yb³⁺/Er³⁺ co-doped KBaGd(MoO₄)₃ phosphor with exceptional thermometric performance has potential applications in the field of optical temperature sensing.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121420"},"PeriodicalIF":3.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666011","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":"Laser absorption characteristics and energydeposition patterns of CL-20 explosives","authors":"Yao Yule,&nbsp;Wu Junying,&nbsp;Li Junjian,&nbsp;Liu Ruizheng,&nbsp;Liu Danyang","doi":"10.1016/j.jlumin.2025.121419","DOIUrl":"10.1016/j.jlumin.2025.121419","url":null,"abstract":"<div><div>In order to explore the energy absorption mechanism of femtosecond laser in explosives, the electronic structures, linear and nonlinear optical parameters of five crystal forms of CL-20 molecules (<em>α</em>, <em>β</em>, <em>ε</em>, <em>ξ</em>, and <em>γ</em>) were systematically calculated under laser irradiation based on density functional theory and vibrational frequency analysis in this study. The corresponding ultraviolet–visible (UV) and infrared (IR) absorption spectrum characteristics and laser energy deposition patterns were revealed. The results indicated that single-photon energy level transitions and molecular resonance absorption were not the primary photon absorption mechanisms of CL-20 explosives under laser irradiation (with wavelength ranging from 300 to 1200 nm). The reflection coefficient <em>R</em> and linear absorption coefficient <em>α</em> of explosives were related to the parameters such as crystal form and laser wavelength. Under lasers irradiation with wavelength range from 200 to 250 nm, the only significant single-photon absorption was exhibited in five crystal forms of CL-20 molecules (<em>α</em>, <em>β</em>, <em>ε</em>, <em>ξ</em>, and <em>γ</em>). The corresponding linear absorption coefficients were ranked in descending order as <em>γ</em>-CL-20, <em>α</em>-CL-20, <em>ξ</em>-CL-20, <em>β</em>-CL-20, <em>ε</em>-CL-20, respectively, which was ranked in the opposite order with predicted ablation thresholds. However, under femtosecond lasers irradiation with wavelength range from 400 to 500 nm and from 650 to 750 nm, the obvious two-photon, three-photon absorption and weaker single-photon absorption were exhibited in five crystal forms of CL-20 explosives, respectively. In addition, the multiphoton nonlinear absorption effect of explosives varied significantly with laser power density, while total absorption coefficient <em>A</em>(I) and multiphoton absorption capacity were positively correlated with laser power density.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121419"},"PeriodicalIF":3.3,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656191","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":"In vivo real-time and in situ sensing of nitric oxide in virus-infected mouse lungs using organic near-infrared-to-visible triplet–triplet annihilation upconversion nanoprobes","authors":"Dejuan Lu,&nbsp;Fang Fang,&nbsp;Dandan Jia,&nbsp;Hanyong Yu,&nbsp;Qiang Xu,&nbsp;Chunling Wang,&nbsp;Jiayi Liu,&nbsp;Xu Cai","doi":"10.1016/j.jlumin.2025.121421","DOIUrl":"10.1016/j.jlumin.2025.121421","url":null,"abstract":"<div><div>Nitric oxide (NO) is a crucial gaseous signaling molecule, and its local concentration fluctuations in vivo can reflect the onset and progression of various pulmonary diseases, such as idiopathic pulmonary fibrosis and viral lung infections. Previous studies have demonstrated a positive correlation between in vivo NO concentration and disease progression, highlighting the urgent need to develop a class of bioprobes capable of highly sensitive and specific real-time NO sensing within living organisms. Herein, we report a “turn-on” near-infrared fluorescence sensing nanoprobe for nitric oxide (NO), which integrates a near-infrared-to-visible triplet–triplet annihilation upconversion (TTA-UC) system with an NO-responsive Bodipy dye. By co-encapsulating both components into the amphiphilic polymer F127, we constructed TTA micelles with excellent photostability and biocompatibility. In vitro studies demonstrated that the TTA nanomicelles can sensitively and specifically respond to exogenous NO. In a pseudotyped mouse model of pulmonary viral infection induced by SARS-CoV-2 spike protein (SP), the upconversion fluorescence of the TTA nmicelles was gradually activated over time, indicating that the developed nanoprobe can dynamically reflect the real-time progression of lung infection in mice. Therefore, the TTA micelles can rapidly diagnose the onset of lung infection at early stages, thereby potentially improving the efficiency of subsequent treatments.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121421"},"PeriodicalIF":3.3,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666009","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":"Effects of Cr3+ and Al3+ co-doping on the spontaneous and stimulated luminescence of MgTa2O6","authors":"D.V. Mlotswa ,&nbsp;M.Y.A. Yagoub ,&nbsp;D. Poelman ,&nbsp;V.R. Orante-Barrón ,&nbsp;S.J. Mofokeng ,&nbsp;H.C. Swart ,&nbsp;K.O. Obodo ,&nbsp;L.L. Noto","doi":"10.1016/j.jlumin.2025.121416","DOIUrl":"10.1016/j.jlumin.2025.121416","url":null,"abstract":"<div><div>Near-infrared (NIR) luminescent materials play a vital role in photonic, optoelectronic, and biological applications. In this work, MgTa₂O₆: 1 mol% Cr³⁺ samples doped with different Al³⁺ concentrations were synthesized by a solid-state chemical reaction at 800 °C for 8 h after ball-milling the mixed precursors. X-ray diffraction (XRD) was used to confirm that the sample crystallized into a single phase, without impurities. Scanning electron microscopy (SEM), was used to confirm the morphology, which consists of irregular particles, and energy dispersive spectroscopy (EDS) confirmed the presence of Mg, Ta, O, Cr, as well as Al. Incorporating Cr³⁺ and Al³⁺ into the host reduced the optical energy band gap of the material from 4.34 to 4.31 eV. The results showed that adding Al³⁺ can improve the photon absorption of the Al³⁺ co-doped MgTa₂O₆: 1mo% Cr³⁺, enhancing its emission intensity. The photoluminescence (PL) spectra displayed a broad emission between 700 and 900 nm, with a barycentre at 850 nm, when the samples were excited at 280 nm. The emission originates from the spin-allowed transition, ⁴T₂ - ⁴A₂, of Cr³⁺ ions.Additionally, the decay curve was recorded, and the extracted time parameter corresponding to the luminescence was 29.79 ± 0.11 μs. The presence of electron trapping centres was confirmed using thermoluminescence (TL) spectroscopy. The depths of the electron trapping centres were approximated to be 0.69 ± 0.05, 0.77 ± 0.04, and 1.21 ± 0.04 eV, respectively. Finally, density functional theory (DFT) was applied to understand the electronic and optical properties with pronounced effects attributed to the presence of the Cr³⁺ ions. The study suggests that Al³⁺ doping MgTa₂O₆: 1 mol% Cr³⁺ has potential applications in solid-state lighting, safety illumination, and possible future development of PersL applications, etc.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121416"},"PeriodicalIF":3.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634341","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":"Thermal equilibrium of light-matter interaction in InGaAs/GaAs quantum wells","authors":"Paweł Wyborski ,&nbsp;Artur Broda ,&nbsp;Iwona Sankowska ,&nbsp;Tomasz Czyszanowski ,&nbsp;Jan Muszalski ,&nbsp;Maciej Pieczarka","doi":"10.1016/j.jlumin.2025.121403","DOIUrl":"10.1016/j.jlumin.2025.121403","url":null,"abstract":"<div><div>We investigated the thermal equilibrium relation between absorption and emission of photons in semiconductor InGaAs/GaAs quantum wells by employing a spectrally resolved photoluminescence excitation spectroscopy. Spectral temperatures were extracted for a wide range of sample temperatures. A deviation from the actual sample temperature is found for values below 60 K, which is attributed to the localisation of excitons and photoexcited carriers in the inhomogeneities of the quantum wells, preventing efficient relaxation and thermalisation. The vanishing supports this conclusion Stokes shift at higher temperatures and the thermal phonon broadening of the exciton line. Our results provide strong evidence for the suitability of alloy-based quantum wells in laser microcavities for achieving Bose-Einstein condensation of photons.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121403"},"PeriodicalIF":3.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679550","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":"A multi-spectroscopic, molecular docking and molecular dynamics study on the binding between bovine serum albumin and ethyl-paraben/propyl-paraben","authors":"Shang-Chun Li ,&nbsp;Peng-Fei Wang ,&nbsp;Li-Mei Wang ,&nbsp;Han Xu ,&nbsp;Qing-Bi Zhang","doi":"10.1016/j.jlumin.2025.121417","DOIUrl":"10.1016/j.jlumin.2025.121417","url":null,"abstract":"<div><div>Parabens can cause endocrine-disrupting effects, hepatotoxicity and pulmonary toxicity in human. Serum albumin is crucial for transporting different exogenous and endogenous molecules. However, the transport mechanisms of parabens in body are not fully understood. In this study, ethyl-paraben (EtP) and propyl-paraben (PrP) were selected to investigate the interactions between parabens and bovine serum albumin (BSA) using multi-spectroscopy, molecular docking and molecular dynamics (MD) analysis. The spectroscopic results showed that EtP and PrP spontaneously occupied site I of BSA to form complexes. The quenching mechanism of BSA-PrP system was static quenching, whereas the quenching behavior of BSA-EtP system was a mixed quenching mechanism of dynamic and static quenching. The formation of BSA-EtP complex is mainly driven by hydrophobic interactions, while van der Waals and hydrogen bonding forces were predominant in BSA-PrP interaction. The results of three-dimensional (3D) and circular dichroism (CD) spectroscopy revealed that EtP and PrP caused alternations on the conformational structure of BSA. PrP exerted a more pronounced effect on BSA conformation. Meanwhile, EtP inhibited the esterase-like activity of BSA, while PrP increased the esterase-like activity of BSA. Molecular docking analysis showed some specific amino acid residues and π-electrons on the benzene ring of EtP/PrP were crucial for maintaining the stability of BSA-EtP/PrP complexes. The results of MD study further confirmed that PrP exerted more effects on the structure of BSA, which were consistent with the results of spectral and molecular docking analysis. This study will provide essential insights for understanding the transportation and distribution mechanisms of parabens in body.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121417"},"PeriodicalIF":3.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656188","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 scintillation properties of Dy-doped SrY2O4 single crystals","authors":"Yusuke Endo ,&nbsp;Kensei Ichiba ,&nbsp;Daisuke Nakauchi ,&nbsp;Keiichiro Miyazaki ,&nbsp;Kenichi Watanabe ,&nbsp;Takumi Kato ,&nbsp;Noriaki Kawaguchi ,&nbsp;Takayuki Yanagida","doi":"10.1016/j.jlumin.2025.121413","DOIUrl":"10.1016/j.jlumin.2025.121413","url":null,"abstract":"<div><div>Currently, CdWO₄, Tl:CsI, and Pr:Gd₂O₂S are commonly used scintillators for X-ray detectors; however, each has inherent drawbacks in terms of containing harmful Cd, deliquescence, and optical transparency. With the aim of developing new scintillators that solve these issues, Sr(Y_1-<em>x</em>Dy_<em>x</em>)₂O₄ (<em>x</em> = 0.05 %, 0.1 %, 0.5 %, and 1 %) single crystals were synthesized using the floating zone method, and their photoluminescence and scintillation properties were evaluated. Emission peaks corresponding to the 4f–4f transitions of Dy³⁺ were observed under X-ray irradiation. Among the samples, the <em>x</em> = 0.1 % sample exhibited the highest scintillation light yield of 15,000 photons/MeV under γ-ray irradiation, comparable to commercially available CdWO₄ (15,800 photons/MeV). Although the afterglow level requires further improvement, the present results suggest a promising scintillator showing good light yield and high chemical stability without toxic elements.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121413"},"PeriodicalIF":3.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634393","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":"Dependence of speckle contrast in laser lighting on laser and phosphor characteristics","authors":"Ole Bjarlin Jensen ,&nbsp;Jian Xu ,&nbsp;Michael Linde Jakobsen","doi":"10.1016/j.jlumin.2025.121415","DOIUrl":"10.1016/j.jlumin.2025.121415","url":null,"abstract":"<div><div>A challenge using lasers for general lighting is the ability of lasers to form speckles. Speckles arise due to the coherence of the laser light. In laser lighting, a blue laser is typically converted to white light through luminescence in a phosphor material. The correct mixing of scattered blue laser light and the yellow light, generated by luminescence, creates the impression of white light. However, elastic scattering of the coherent laser light in phosphor materials causes speckles to appear in the blue part of the generated white light. The presence of speckles affects the uniformity of the light and therefore efforts to reduce the contrast of the speckles are needed. We present a thorough investigation of the influence of different laser and phosphor properties on the degree of speckle contrast in the white light. In this study, we consider objective speckles, observed on a surface, illuminated by the white light. We find that the speckle contrast depends significantly on the coherence properties of the laser as well as on the properties of the phosphor material. These findings are beneficial in order to design low-speckle laser lighting systems for general lighting applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121415"},"PeriodicalIF":3.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656189","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}