Journal of Luminescence最新文献

{"title":"Selective and sensitive sensing of Hg2+ and furazolidone antibiotic using flexible anthracene based sensor","authors":"Tushar Verma,&nbsp;Shagun Kushwaha,&nbsp;Udai P. Singh","doi":"10.1016/j.jlumin.2025.121197","DOIUrl":"10.1016/j.jlumin.2025.121197","url":null,"abstract":"<div><div>A new fluorescent anthracene based probe, 9,10-bis((pyridine-2-ylthio)methyl)anthracene (ANSN) with 2-mercaptopyridine as receptor at 9 and 10 positions has been synthesized. ANSN selectively and sensitively detects the presence of toxic Hg²⁺ ion and furazolidone (FZD) antibiotic in water via turn off mechanism with detection limits of 0.80 μM and 0.12 μM, respectively. The sensor was characterised by ¹H NMR, ¹³C NMR and single crystal X-ray diffraction techniques. The ANSN crystallizes in monoclinic crystal system with <em>C</em>2/<em>c</em> space group and the pyridine-2-ylthio group adopts the anti-conformation with reference to the plane of anthracene unit. The removal of Hg²⁺ is very important as it is one of the toxic heavy metal presents on the earth that occurs in three forms-elemental, organic and inorganic. The stoichiometry and the interaction of Hg²⁺ with ANSN was examined by job plot and FT-IR spectroscopy, stating that the complex exists in 1:2 stoichiometric ratios. The lowering of stretching band of imine bond (C=N) at 1647 cm⁻¹ in free ANSN to 1609 cm⁻¹ in Hg²⁺ complex clearly demonstrated that the ligand interacts with Hg²⁺ by nitrogen atom. Moreover, the stability of the complex was inferred by DFT calculations. The fluorescence quenching of ANSN by FZD was explained by photoinduced electron transfer (PET). The anti-interference experiments suggested that present probe has good selectivity for both the quenchers. This study concludes that ANSN can be easily and widely used as a promising sensor for sensitive and selective detection of FZD and Hg²⁺ ion in water samples.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121197"},"PeriodicalIF":3.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686999","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":"Enhancement of luminescence and stability of CsPbBr3 quantum dots and their related light-emitting diodes through passivation by guanidine bromide","authors":"Jianping Huang,&nbsp;Fangfang You,&nbsp;Qing Zhang,&nbsp;Yi Yao,&nbsp;Wenhua Zhang,&nbsp;Faqiang Xu","doi":"10.1016/j.jlumin.2025.121196","DOIUrl":"10.1016/j.jlumin.2025.121196","url":null,"abstract":"<div><div>All-inorganic perovskite CsPbX₃ (X = Cl, Br, I) quantum dots (QDs) have attracted considerable attention in the fields of light-emitting diodes (LEDs) and displays owing to their excellent photoelectric properties. However, the intrinsic defects and poor stability in QDs limit their practical application. In order to address these problems, this study introduced guanidine bromide (GABr) as modifying agent during the synthesis of CsPbBr₃ QDs using the ligand-assisted reprecipitation method. From XRD and TEM studies, the introduction of GABr effectively enhances the crystallinity and adjusts the morphology of QDs without altering the crystal structure. The XPS and FTIR results revealed that the GA group not only fills the halogen vacancy defects by replacing part of the long-chain organic ligand Octanoic acid (OTAc), but also effectively passivate the unsaturated Pb forming a stable CsPbBr₃ QD with tri-ligand and optimized optical property and stability. As the confirmation of the passivation effects, the perovskite LEDs (PeLEDs) devices with CsPbBr₃ QDs as emission layers (EMLs) were fabricated and the maximum EQE and luminance for the passivated EML are nearly two times higher than that of primeval CsPbBr₃ QDs devices, and the spectral stability of electroluminescence is obviously enhanced. This work provides a straightforward passivation strategy for preparing efficient and stable CsPbBr₃ QDs and related optoelectronic devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121196"},"PeriodicalIF":3.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686997","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 photoluminescence of graphene quantum dots synthesized via laser ablation in ethanol","authors":"Philipi Cavalcante Ricardo ,&nbsp;Gustavo Nicolodelli ,&nbsp;Márcio Celso Fredel","doi":"10.1016/j.jlumin.2025.121186","DOIUrl":"10.1016/j.jlumin.2025.121186","url":null,"abstract":"<div><div>GQDs were synthesized via eco-friendly pulsed laser ablation in the liquid (PLAL) method, employing ethanol as the solvent and carbon black as the carbon source. The photoluminescence (PL) behavior of GQDs was systematically analyzed using emission-excitation matrices across varying concentrations and pH conditions. Increasing GQD concentrations resulted in redshifts of maximum PL excitation bands, transitioning from 235 nm to 272 nm and subsequently to 365 nm. The corresponding PL emission shifted from 310 nm to 410 nm and finally to 495 nm. These findings reveal aggregation-induced quenching (AIQ) in the blue region and aggregation-induced emission (AIE) at longer wavelengths, emphasizing the role of aggregation in modulating GQD PL properties. The photoluminescence of GQDs was also strongly influenced by pH. At acidic pH, dual emission maxima were observed at 375 nm and 450 nm, linked to higher aggregation states due to the protonation of edge groups. Conversely, at pH values above 7.0, the GQDs exhibited a single emission peak at 470 nm, reflecting controlled aggregation dominated by core group contributions. Neutral pH yielded a redshifted emission maximum at 460 nm, attributed to oxygenated groups in the core structure. This work elucidates the crucial influence of aggregation and pH on GQD photoluminescence, offering essential insights into their mechanisms when synthesized without acidic agents. Adopting a sustainable synthesis approach reveals the tunable luminescent properties of high-purity, undoped GQDs, advancing their potential for environmentally friendly applications and supporting the design of graphene-based nanomaterials for targeted functionalities.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121186"},"PeriodicalIF":3.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686996","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":"Energy transfer phenomena in Er3+, Yb3+, Tm3+ tri-doped lanthanum oxysulfide phosphors","authors":"Alexandre Le Coz,&nbsp;Louis Cornet,&nbsp;Guillaume Durand,&nbsp;Romane Henry-Bauer,&nbsp;Manon Even,&nbsp;Marine Poitou,&nbsp;François Cheviré,&nbsp;Yan Suffren,&nbsp;Odile Merdrignac-Conanec","doi":"10.1016/j.jlumin.2025.121195","DOIUrl":"10.1016/j.jlumin.2025.121195","url":null,"abstract":"<div><div>Lanthanum oxysulfide (La₂O₂S) was investigated as an effective doping matrix for the development of Er³⁺, Yb³⁺, Tm³⁺ tri-doped phosphors emitting white light. The powders were prepared by combustion synthesis and subsequently post-sulfurized under H₂S/N₂. They were characterized using Powder X-Ray Diffraction, Fourier-Transform Infrared Spectroscopy, Scanning Electron Microscopy and thermogravimetric analysis to assess their purity, morphology and thermal stability. The excitation, down-conversion and up-conversion properties of the phosphors were then studied using UV/Visible/NIR and fluorescence spectroscopy. Although white emission was not achieved with the studied compositions, a mechanism for up-conversion energy transfer in the tri-doped samples is proposed.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121195"},"PeriodicalIF":3.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Luminescence and upconversion properties of Pr3+-doped CsSrF3 fluoroperovskite","authors":"Nadiia Rebrova","doi":"10.1016/j.jlumin.2025.121190","DOIUrl":"10.1016/j.jlumin.2025.121190","url":null,"abstract":"<div><div>Praseodymium-doped compounds exhibiting visible-to-UVC upconversion are currently being extensively researched for potential applications in disinfection and sterilization. This study, for the first time, investigates the luminescence and upconversion properties of CsSrF₃:Pr³⁺. Crystallites activated with varying concentrations of Pr³⁺ were synthesized using the solid-state method. Under direct ³P₂ excitation, upconversion emission was observed in the UVC region (230–310 nm), along with visible emission spanning 465–750 nm. The influence of Pr³⁺ doping concentration on the phosphor's characteristics was systematically analyzed. To elucidate the mechanism responsible for upconversion in CsSrF₃:Pr³⁺ crystallites, the dependence of emission intensity on laser pump power and the upconversion lifetime under pulsed laser excitation were measured.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121190"},"PeriodicalIF":3.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628545","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":"Exploring the luminescence mechanism and enabling tunable emission in Sr3YGa2O7.5: Bi3+, Eu3+ phosphors for advanced UV-converted white LEDs","authors":"Taifang Zhang ,&nbsp;Dan Zhang ,&nbsp;Peng Wang ,&nbsp;Lingxuan Zhou ,&nbsp;Mikhail G. Brik ,&nbsp;Chonggeng Ma","doi":"10.1016/j.jlumin.2025.121192","DOIUrl":"10.1016/j.jlumin.2025.121192","url":null,"abstract":"<div><div>Inorganic phosphors with tunable broadband emission hold significant applications in solid-state lighting. Herein, a series of novel Sr₃YGa₂O_7.5: Bi³⁺, Eu³⁺ (abbreviated as SYGO: Bi³⁺, Eu³⁺) phosphors with tunable optical properties were synthesized by high-temperature solid-state reaction process. The photoluminescence excitation (PLE) spectrum of Sr₃YGa₂O_7.5: Bi³⁺ ranges from 200 to 400 nm with two peaks at 280 and 331 nm, matching well with the n-UV chip based white light-emitting diodes (WLED). Under ultraviolet light excitation, a single Bi³⁺-doped Sr₃YGa₂O_7.5 phosphor exhibited five distinct luminescence peaks at 410, 510, 560, 605, and 700 nm at 10 K, which are attributed to the ³P₁→¹S₀ transition emissions of Bi³⁺ ions occupying the four Sr sites and one Y site within the Sr₃YGa₂O_7.5 host lattice. The optical tuning of the Sr₃YGa₂O_7.5: Bi³⁺ phosphor is achieved by designing the Bi³⁺→Eu³⁺ energy transfer and changing the excitation wavelength based on the selected site occupation. The Commission Internationale de l'Eclairage (CIE) coordinates and emission color of the Sr₃YGa₂O_7.5: Bi³⁺, Eu³⁺ phosphors were successfully tuned from blue via white to red. The energy transfer efficiency from Bi³⁺ to Eu³⁺ can reach as high as 89.54 %, and this energy transfer process is predominantly governed by the dipole-quadrupole interaction. In addition, the white LED device prepared by combination of SYGO: 0.02Bi³⁺, 0.03Eu³⁺ phosphors with 365 nm chip has high color rendering index (CRI) of 85.5 and low correlated color temperature of 3537 K. As the driving current increases, the white light emitting diodes (WLED) device demonstrates good color stability. Based on these findings, the synthesized SYGO: Bi³⁺, Eu³⁺ phosphors can serve as color-tunable and single-phase white phosphors with potential applications in UV-excited white LEDs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121192"},"PeriodicalIF":3.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642935","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":"YAG:Ce-glass/porous stainless steel composite materials for laser illumination","authors":"Xu Changyi ,&nbsp;Ding Haifeng ,&nbsp;Fan Guohua ,&nbsp;Zhou Tianliang ,&nbsp;Zhou Wenbin","doi":"10.1016/j.jlumin.2025.121193","DOIUrl":"10.1016/j.jlumin.2025.121193","url":null,"abstract":"<div><div>Al₂O₃-based YAG:Ce PiG composite films have gained significant attention as optimal color converters for laser illumination due to their straightforward fabrication process and exceptional stability. However, the inherent limitations in the thermal conductivity of Al₂O₃ result in a low pump utilization rate, making it challenging to achieve efficient white light output from PiG films. In this study, we introduce a novel laser illumination component composed of porous stainless steel (PSS) integrated with YAG:Ce/glass (PGiPSS), which has been sintered at 750 °C. The PSS demonstrates adequate thermal conductivity and the capacity to host a substantial number of luminescent particles within its pores, leading to enhanced quantum efficiency and reduced thermal quenching effects. Notably, when subjected to a 450 nm laser diode with a peak excitation power density of 24.10 W/mm², the developed PGiPSS generated white light with a correlated color temperature (CCT) of 6693 K and an impressive luminous efficiency of 135.2 lm/W. These findings indicate that PGiPSS is a viable candidate for applications requiring high-power and high-brightness laser illumination.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121193"},"PeriodicalIF":3.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631998","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":"Optical and scintillating properties of Cs-doped (PEA)2PbBr4 perovskite crystals","authors":"Francesco Maddalena ,&nbsp;Michal Makowski ,&nbsp;Md Abdul Kuddus Sheikh ,&nbsp;Dominik Kowal ,&nbsp;Romakanta Bhattarai ,&nbsp;Marcin Eugeniusz Witkowski ,&nbsp;Konrad Jacek Drozdowski ,&nbsp;Muhammad Haris Mahyuddin ,&nbsp;Trevor David Rhone ,&nbsp;Winicjusz Drozdowski ,&nbsp;Cuong Dang ,&nbsp;Muhammad Danang Birowosuto","doi":"10.1016/j.jlumin.2025.121188","DOIUrl":"10.1016/j.jlumin.2025.121188","url":null,"abstract":"<div><div>Inorganic ion doping has emerged as a promising approach to enhance the scintillation properties of two-dimensional (2D) organic-inorganic hybrid perovskite (OIHP) crystals, particularly by increasing mass density and effective atomic number (Z). In this study, we investigate the effects of cesium (Cs) doping on (PEA)₂PbBr₄. Our findings indicate that Cs-doping in (PEA)₂PbBr₄, especially above 5 %, results in the formation of local quasi-2D domains within the grown crystal and even bulk domains at higher concentrations. This leads to an overall narrowed band gap, reduced by as much as 0.2 eV compared to the undoped material. Cs-doping also broadens photoluminescence (PL) spectra and significantly accelerates PL decay times, achieving fast as (1.1 ± 0.1) ns, with an average decay time reduction of 81 % compared to undoped crystals. Furthermore, the inclusion of Cs ions shortens scintillation decay times, reaching as fast as (51.6 ± 5.7) ns, with an average decrease of 10 %. Notably, Cs-doping at a threshold concentration of 5 % leads to a 30 % improvement in light yields (LYs). These results demonstrate that Cs-doping significantly enhances the performance of (PEA)₂PbBr₄ crystals, making them particularly well-suited for high LYs and fast timing applications, such as photon counting and positron emission tomography. This study underscores the potential of Cs-doped OIHP crystals in advancing the capabilities of scintillation-based radiation detection technologies.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121188"},"PeriodicalIF":3.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631997","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":"Luminescence thermometry based on upconversion luminescence of yttrium oxide doped with thulium and ytterbium","authors":"I.V. Baklanova,&nbsp;V.N. Krasil'nikov,&nbsp;А.P. Tyutyunnik,&nbsp;Ya.V. Baklanova","doi":"10.1016/j.jlumin.2025.121189","DOIUrl":"10.1016/j.jlumin.2025.121189","url":null,"abstract":"<div><div>The (Y_0.95Yb_0.05-xTm_х)₂O₃ (x = 0.0025, 0.005, 0.0075 and 0.01) phosphors were synthesized by the precursor method to study their upconversion emission characteristics in the spectral visible region. The phase purity of the obtained oxides was confirmed by X-ray powder diffraction analysis. The power and concentration dependences of upconversion luminescence were determined for the 420–730 nm region. To evaluate the potential of the compounds as fluorescent temperature sensors, the temperature dependences of upconversion emission of (Y_0.95Yb_0.045Tm_0.005)₂O₃ sample were investigated in the range from 25 to 225 °C. The maximum absolute and relative sensitivities were 2.416 % K⁻¹ at 498 K and 1.351 % K⁻¹ at 300 K, respectively. The luminescence color of the (Y_0.95Yb_0.045Tm_0.005)₂O₃ sample changes from blue to white in a narrow temperature range of 150–175°С.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121189"},"PeriodicalIF":3.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686995","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":"Enhanced photoluminescence and optical properties of erbium-doped zinc tellurite glasses for visible and near-infrared photonic applications","authors":"S.N. Nazrin ,&nbsp;M.S. Sutrisno ,&nbsp;Halimah Badioze Zaman ,&nbsp;Neesha Jothi ,&nbsp;Aladdin Assaiqeli ,&nbsp;Safa Ezzine","doi":"10.1016/j.jlumin.2025.121184","DOIUrl":"10.1016/j.jlumin.2025.121184","url":null,"abstract":"<div><div>Erbium-doped zinc tellurite glasses are emerging as valuable materials for photonic applications, particularly in visible and near-infrared (NIR) regions, due to their strong photoluminescence and favorable optical properties. However, optimizing these glasses for high emission intensity while avoiding concentration quenching remains a challenge. This study aims to fabricate and characterize erbium-doped zinc tellurite glasses with varying erbium oxide (Er₂O₃) concentrations, focusing on their photoluminescence behavior in both visible and NIR regions. Glass samples were prepared using the melt-quenching method and analyzed through UV–Vis–NIR optical and photoluminescence (PL) spectroscopy. The results showed strong emissions in the green (550 nm) region, with optimal emission intensities at a 0.02 M fraction of erbium oxide. Additionally, broad NIR emissions were observed at 1530 nm, suitable for optical communication applications such as broadband optical amplifiers. Beyond a 0.03 M fraction, the intensity decreased due to concentration quenching, attributed to cross-relaxation mechanisms among erbium ions. Judd-Ofelt analysis and McCumber theory were applied to understand the radiative properties and gain coefficients. The study concludes that 0.02 M fraction is the optimal erbium concentration, offering a balance between high visible and NIR emission intensities and minimal quenching. These findings demonstrate the potential of erbium-doped zinc tellurite glasses for improving optical communication systems and photonic devices, paving the way for advancements in fiber amplifiers and laser technologies.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121184"},"PeriodicalIF":3.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714942","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}