Journal of Luminescence最新文献

{"title":"Molecular luminescent complex of Tagetes patula L. antioxidants with porphyrin and singlet oxygen generation","authors":"Anna Tsibulnikova ,&nbsp;Vasily Slezhkin ,&nbsp;Evgeniya Zemlyakova ,&nbsp;Alena Kostrina ,&nbsp;Dmitry Artamonov ,&nbsp;Ilia Samusev ,&nbsp;Valery Bryukhanov ,&nbsp;Anna Kundalevich ,&nbsp;Elizaveta Demishkevich ,&nbsp;Alina Bakhtiyarova ,&nbsp;Olga Babich ,&nbsp;Matheus Mantuanelli Roberto ,&nbsp;Stanislav Suckhikh","doi":"10.1016/j.jlumin.2025.121307","DOIUrl":"10.1016/j.jlumin.2025.121307","url":null,"abstract":"<div><div>The spectral-luminescent properties of marigold (Tagetes patula L.) flower extracts were studied in alcohol mixtures with a porphyrin derivative (mesoporphyrin IX dihydrochloride) under visible-region photoexcitation. The fluorescence and phosphorescence photonics of the resulting complexes were analyzed under normal and elevated oxygen concentrations to determine the energy and kinetics of the generation of singlet oxygen molecules in solution.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"285 ","pages":"Article 121307"},"PeriodicalIF":3.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170637","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":"Design strategies for optical thermometers based on diverse luminescence thermal-response in Li2CaTa2O7:Ln3+ phosphors (Ln3+ = Pr3+, Er3+)","authors":"Yanru Yin,&nbsp;Dexin Liu,&nbsp;Lianhua Tian","doi":"10.1016/j.jlumin.2025.121304","DOIUrl":"10.1016/j.jlumin.2025.121304","url":null,"abstract":"<div><div>In this paper, the photoluminescence properties of Li₂CaTa₂O₇:Ln³⁺ (Ln³⁺ = Pr³⁺, Er³⁺) phosphors were investigated. Under the 450 nm blue light excitation, Li₂CaTa₂O₇:Pr³⁺ exhibits emission ranging from green to red, and its strong response to blue-light excitation facilitates easier integration into device encapsulation processes. Under 379 nm excitation, the emission spectra of Li₂CaTa₂O₇:Er³⁺ display characteristic peaks in both the green and near-infrared regions. As the temperature increases, the photoluminescence intensities of the emission peaks at 533 nm (Pr³⁺) and 528 nm (Er³⁺) show a slight enhancement. Based on the distinct temperature dependencies of the thermally coupled levels of Pr³⁺ and Er³⁺, the relative sensitivity (<em>S</em>_r) and absolute sensitivity (<em>S</em>_a) of the samples were calculated using the fluorescence intensity ratio (<em>FIR</em>) method. The maximum <em>S</em>_r values for Pr³⁺ and Er³⁺ in the Li₂CaTa₂O₇ host were found to be 3.072 % K⁻¹ at 120 K and 7.739 % K⁻¹ at 140 K, respectively. These results demonstrate the excellent thermometric performance of Li₂CaTa₂O₇:Ln³⁺ (Ln³⁺ = Pr³⁺, Er³⁺), highlighting its potential for temperature sensing applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121304"},"PeriodicalIF":3.3,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108212","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 and high-output voltage lead-free perovskite-based fiber optoelectronic devices","authors":"Xueliang Zhang ,&nbsp;Xiaoman Zhang ,&nbsp;Xiaodong Zhang ,&nbsp;Lefu Mei ,&nbsp;Luoxin Wang ,&nbsp;Hua Wang ,&nbsp;Xiangming Li ,&nbsp;Kun Nie","doi":"10.1016/j.jlumin.2025.121305","DOIUrl":"10.1016/j.jlumin.2025.121305","url":null,"abstract":"<div><div>Lead-free halide perovskites have excellent optoelectronic properties and have been widely studied in the optoelectronic field. A kind of all-inorganic double perovskite crystals (PCs) with high output voltage and high sensitivity was successfully synthesized via a more energy-efficient crystallization method in this study. The luminescence intensity of the perovskite crystals was significantly enhanced by Bi³⁺ doping. These perovskite crystals were used to prepare red light-emitting diodes (LEDs) with color purity of up to 93.1 %. In addition, the perovskite crystals were used to modify aramid chopped fibers (ACFs)/polyphenylene sulfide (PPS) composite fibers to fabricate flexible luminescent fibers. The modified composite fibers also demonstrated exceptional piezoelectric properties. Therefore, the modified composite fiber was used to prepare a piezoelectric sensor. The maximum output voltage of the sensor could reach 50 V at room temperature with a response time of only 8 ms. The piezoelectric constant <em>d</em>₃₃ of this piezoelectric sensor was 374 pC/N, indicating that the sensor had high sensitivity. When the temperature increased to 373 K, the output voltage gradually rose to 100 V. The red and white LED devices demonstrated the potential of perovskites for lighting and display applications. Meanwhile, the flexible light-emitting fibers and piezoelectric sensors further expanded the application scope of perovskite in multifunctional optoelectronic devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121305"},"PeriodicalIF":3.3,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084309","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":"Ultra-broadband near-infrared-I and II emission from chromium doped double perovskite for multifunction application","authors":"Yan Fan ,&nbsp;Haoyi Wu ,&nbsp;Yahong Jin ,&nbsp;Yanmei Li ,&nbsp;Yihua Hu","doi":"10.1016/j.jlumin.2025.121273","DOIUrl":"10.1016/j.jlumin.2025.121273","url":null,"abstract":"<div><div>Broadband near-infrared phosphor converted light-emitting diode (NIR pc-LED) has been widely concerned as a generation of light source. However, the preparation of ultra-broadband NIR phosphors with long wavelength emission remains challenging. In this study, Cr³⁺-doped double perovskite-type GdTiTaO₆ (GTTO) phosphors were successfully prepared using the high-temperature solid-state reaction. The phosphors exhibit ultra-broadband NIR emission spanning 700–1400 nm, with a peak center at 940 nm and a full width at half maximum (FWHM) of 260 nm, which is ascribed to the strong electron-phonon coupling effect (EPC). A NIR pc-LED device was fabricated by integrating GTTO: 0.03Cr³⁺ phosphors with a 470 nm emissive LED-chip. Benefit from the ultra-broadband emission, the LED shows promising application in the night vision and transmission due to the NIR-I emission. In addition, a testing platform was creatively built for the first time. The platform realizes the non-destructive and rapid detection of ethanol concentration and the detection of fruit moisture, verifying the multi-functional application of GdTiTaO₆: Cr³⁺ phosphor.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121273"},"PeriodicalIF":3.3,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108217","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":"Effect of MAAc capping on the enhanced photophysical and photoluminescence properties of Pb-free Cs2SnCl6 double perovskites","authors":"Usman Zahid,&nbsp;Muhammad Asad Riaz,&nbsp;Azhar Iqbal","doi":"10.1016/j.jlumin.2025.121306","DOIUrl":"10.1016/j.jlumin.2025.121306","url":null,"abstract":"<div><div>We reported the enhanced PL and charge carrier lifetimes for Cs₂SnCl₆ double perovskite nanocrystals (NCs) capped with mercaptoacetic acid (MAAc) through various experimental investigations. To regulate and mediate the synthesis of Cs₂SnCl₆ perovskite NCs, MAAc was employed as a capping agent. The X-rays diffraction analysis confirms the formation of Cs₂SnCl₆ double perovskite with outstanding phase stability in cubic phase. The capping effect of Cs₂SnCl₆ NCs with S-moiety of MAAc was clearly observed in the FTIR-spectra. X-ray photoelectron spectroscopy (XPS) analyses confirming +4 oxidation state of Sn. Most probably the higher oxidation state of Sn is responsible for improved air stability of Cs₂SnCl₆ in ambient atmosphere. The genesis of steady-state PL and the PL decay kinetics of Cs₂SnCl₆ NCs are examined using steady-state PL and time-resolved PL. With an increase in the concentration of the MAAc as stabilizing agent, the steady-state PL spectra revealed a slight redshift. The concentration of MAAc also incredibly affects the PL kinetics, charge carrier lifetime and the best sample amongst all synthesized Cs₂SnCl₆ NCs is the one with the 0.5 mM capping agent concentration with charge carrier lifetime of 11.17 ns. The long PL lifetime of Cs₂SnCl₆ NCs enable them to be a viable option for integration in light-emitting diodes and x-ray scintillators.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121306"},"PeriodicalIF":3.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072653","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":"Highly sensitive optical nanothermometry using Er3+-doped GdOF nanoparticles: synthesis, characterization, and temperature sensing applications","authors":"Federica Scardaci ,&nbsp;José I. Espeso ,&nbsp;Diego Pérez-Francés ,&nbsp;Graziella Malandrino ,&nbsp;Rafael Valiente","doi":"10.1016/j.jlumin.2025.121290","DOIUrl":"10.1016/j.jlumin.2025.121290","url":null,"abstract":"<div><div>The synthesis and characterization of 1 mol% Er³⁺-doped GdOF nanoparticles for use as optical nanothermometer are presented. The nanoparticles were synthesized using a microwave-assisted solvothermal method, followed by calcination at 700 °C to obtain the oxyfluoride phase. Temperature sensitivity was evaluated using the fluorescence intensity ratio (FIR) method, based on the thermally coupled ²H_11/2 and ⁴S_3/2 levels of Er³⁺ over the 294–423 K range. The results demonstrate a high sensitivity, with an absolute sensitivity of 3.07 × 10⁻³ K⁻¹ at 423 K and a relative sensitivity of 1.25 % K⁻¹ at 294 K. These competitive values position Er³⁺-doped GdOF nanoparticles as promising candidates for temperature sensing applications in biomedicine and nanotechnology, offering advantages over other Er³⁺-based nanothermometers in different host matrices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121290"},"PeriodicalIF":3.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108216","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":"Dual mode luminescence and abnormal thermal quenching of Ho3+ activated Ca2SnO4 phosphors","authors":"Haiying Cheng,&nbsp;Congliang Shen,&nbsp;Ting Li,&nbsp;Baoqing Sun,&nbsp;Mingyue Zhang,&nbsp;Zhaoyu Guang","doi":"10.1016/j.jlumin.2025.121277","DOIUrl":"10.1016/j.jlumin.2025.121277","url":null,"abstract":"<div><div>In this work, Ho³⁺ and Ho³⁺/Yb³⁺ co-doped Ca₂SnO₄ (CSO) phosphors are synthesized using high-temperature solid-state method. Under 980 nm excitation, CSO: Ho³⁺/Yb³⁺ exhibits 550 nm green emission (⁵F₄, ⁵S₂ → ⁵I₈) and 650 nm red emission (⁵F₅ → ⁵I₈) via a two-photon UC process, and the luminescence chromaticity is independent of the dopant concentration. Intense pure 550 nm green emission with abnormal thermal quenching effect in CSO: Ho³⁺ and CSO: Ho³⁺/Yb³⁺ phosphors are obtained under 461 nm blue excitation. The green emission intensities of CSO: Ho³⁺ and CSO: Ho³⁺/Yb³⁺ reach 106 % at 373 K and 112 % at 348 K, respectively, in comparison to that at ambient temperature (298 K), which is attributed to matrix based intrinsic defects. The incorporation of Yb³⁺ in CSO: Ho³⁺ further enhances the fluorescence intensity from 87.7 % to 103.8 % at 423 K. These phosphors with UC and DC dual-mode luminescence and abnormal thermal quenching behavior have application prospect for green emitting LEDs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121277"},"PeriodicalIF":3.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090176","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 nonlinear transmission of GaSe thin films","authors":"M.A. Samsonov ,&nbsp;A. Hasan ,&nbsp;D.M. Zhigunov ,&nbsp;V.N. Mantsevich ,&nbsp;A.M. Smirnov","doi":"10.1016/j.jlumin.2025.121293","DOIUrl":"10.1016/j.jlumin.2025.121293","url":null,"abstract":"<div><div>We present the analysis of linear and nonlinear optical properties of gallium selenide (GaSe) films measured by means of pump and probe technique. GaSe films with different thickness were obtained by mechanical exfoliation approach. The exciton transition bleaching was observed under excitation of 10 ns pulses centered at 360 nm and 540 nm, which was explained by the exciton phase space filling effect. The main mechanisms of recombination of excited charge carriers at room temperature were established and their kinetic properties were studied. Three bands were identified within the measured photoluminescence (PL) spectra of GaSe films. The detuning of the maxima of these PL bands was shown to be stable across different samples, different excitation energies, and different excitation wavelengths. This consistency of relative peak positions indicates their physical nature. We were able to identify the contribution to PL signal from direct excitons, indirect excitons and electron-hole pairs with the participation of optical phonons. The theoretical model was proposed, which allowed to analyze electron, hole and exciton kinetics measured by time-resolved PL.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121293"},"PeriodicalIF":3.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068673","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 properties of homoepitaxial Mg-doped GaN under different doping concentrations and annealing atmospheres","authors":"Wenxuan Wu ,&nbsp;Zhengdong Shu ,&nbsp;Xiaodan Wang ,&nbsp;Yue Wang ,&nbsp;Yangye Pan ,&nbsp;Jiahao Sun ,&nbsp;Xiaodong Gao ,&nbsp;Shunan Zheng ,&nbsp;Miao Wang ,&nbsp;Xionghui Zeng ,&nbsp;Ke Xu","doi":"10.1016/j.jlumin.2025.121294","DOIUrl":"10.1016/j.jlumin.2025.121294","url":null,"abstract":"<div><div>The luminescence properties of p-type GaN thin films grown on high-quality GaN FS substrates, with Mg doping concentrations ranging from 5 × 10¹⁸ cm⁻³ to 8 × 10¹⁹ cm⁻³, were investigated using low-temperature and room-temperature PL and CL spectra. The UVL peak at 3.27 eV and the two BL peaks at 3.05 eV and 2.7 eV observed in the sample have been identified. These peaks are attributed to different defect states introduced by Mg doping in GaN. Their correlation with the UVL peak and the two BL peaks has been established, providing insight into the acceptor energy levels induced by Mg doping. At different doping concentrations, annealing has a varying impact on the luminescence peaks. It was observed that the BL2 peak at 2.7 eV competes with the UVL peak. Annealing in N₂ produces higher-intensity UVL peaks than annealing in O₂, indicating that N₂ annealing is more beneficial for activating Mg_Ga acceptors compared to O₂ annealing in c-plane homoepitaxial GaN.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121294"},"PeriodicalIF":3.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072654","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":"Thermoluminescent and photoluminescent properties of CaGd2ZnO5:Er3+ phosphors: Insights into dosimetry and w-LED fabrication","authors":"I.S. Pruthviraj ,&nbsp;B.R. Radha Krushna ,&nbsp;K. Karthikeyan ,&nbsp;S.C. Sharma ,&nbsp;S.S. Mohapatra ,&nbsp;K. Manjunatha ,&nbsp;Sheng Yun Wu ,&nbsp;K.N. Narasimhamurthy ,&nbsp;F. Femila Komahal ,&nbsp;H. Nagabhushana","doi":"10.1016/j.jlumin.2025.121295","DOIUrl":"10.1016/j.jlumin.2025.121295","url":null,"abstract":"<div><div>A series of CaGd_2-xZnO₅:xEr³⁺ (CGZO:Er³⁺) phosphors, doped with Er³⁺ at concentrations ranging from 1 to 5 mol %, were synthesized using the solution combustion method, employing <em>Mimosa pudica (M.P.)</em> extract as a natural fuel. Comprehensive characterization was conducted through powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Thermoluminescence (TL) investigations were performed to analyze dose response, reproducibility, fading, and the material's sensitivity to gamma (<em>γ</em>) and X-ray photons. The phosphors demonstrated a linear TL response across a <em>γ</em> dose range of 0.01–100 Gy, with 32.17 % fading over a two-month period, highlighting their potential for medical dosimetry. Curve fitting of TL glow peaks through CGCD (Computerized Glow Curve Deconvolution) revealed multiple overlapping peaks below the primary peak at 146 °C, corresponding to activation energies between 0.8 and 2.1 eV. Higher heating rates reduced the peak intensity and area, underscoring the role of thermal stimulation in modulating trap depth characteristics. Photoluminescence (PL) measurements indicated intense green emissions at 553 nm under 378 nm excitation, attributed to intra-4f transitions of Er³⁺ ions. Temperature-dependent PL (TDPL) demonstrated thermally stable luminescence, linking dopant ion symmetry to emission efficiency. The phosphors exhibited excellent color purity (∼99.7 %), with favourable CIE chromaticity coordinates (0.2971, 0.6956) and a correlated color temperature (CCT) of 6004 K. White-light-emitting diodes (w-LEDs) fabricated using the phosphors displayed a high color rendering index (CRI) (<em>R</em>_<em>a</em> = 95) alongside optimized chromaticity coordinates (0.3261, 0.3378) and a CCT of 5790 K. These findings highlight the phosphors as strong candidates for green light emission in horticultural lighting and solid-state devices. Furthermore, the robust TL properties establish them as viable materials for <em>γ</em> dosimetry, reinforcing their suitability for medical applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121295"},"PeriodicalIF":3.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071654","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}