Journal of Luminescence最新文献

{"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":"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":"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}

{"title":"Multi-mode temperature sensing and anti-counterfeiting using Ca2+-doped Zn2GeO4 phosphors","authors":"Xincheng Lv ,&nbsp;Liangliang Hu ,&nbsp;Peng Qiao ,&nbsp;Lei Lei ,&nbsp;Shiqing Xu ,&nbsp;Hongping Ma","doi":"10.1016/j.jlumin.2025.121291","DOIUrl":"10.1016/j.jlumin.2025.121291","url":null,"abstract":"<div><div>Multicolor materials have promising applications as multi-sensing probes. In this work, Ca²⁺-doped Zn₂GeO₄ phosphor were employed to enhance ratiometric temperature sensing and multi-mode anti-counterfeiting. Crystal structure and photoluminescence analyses revealed that Ca²⁺ incorporation altered the local crystal environment and increased vacancy defects. By analyzing the temperature-dependent emission spectra and fluorescence lifetime decay, we observed that the Zn_1.8GeO₄:0.2Ca²⁺ sample demonstrated a maximum relative sensitivity of 2.22 % K⁻¹ (fluorescence intensity ratio) and 0.43 % K⁻¹ (lifetime) within the 303–413 K range, enabling dual-mode optical thermometry. Moreover, the prepared labels displayed excitation-wavelength-dependent color changes from blue to green, as well as green afterglow luminescence. They also exhibited temperature-dependent color variations, making them suitable for multi-mode anti-counterfeiting applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121291"},"PeriodicalIF":3.3,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935339","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 in Eu2+-activated KCaLa(PO4)2 phosphor through structural disorder","authors":"Wanying Xie ,&nbsp;Xuan Miao ,&nbsp;Li Zhang ,&nbsp;Guocui Qi ,&nbsp;Xiuju Yin ,&nbsp;Peng Zhang","doi":"10.1016/j.jlumin.2025.121292","DOIUrl":"10.1016/j.jlumin.2025.121292","url":null,"abstract":"<div><div>Cation substitution has emerged as a powerful strategy for both discovering new phosphors and regulating their luminescent properties. However, the incorporation of high concentrations of impurity ions often triggers phase transitions, making it challenging to maintain phase purity while achieving precise luminescent color control. In this study, we present a novel broadband cyan-emitting phosphor KCaLa(PO₄)₂: Eu²⁺, which exhibits multicolor emission capabilities through Sr²⁺ doping-induced site occupancy disorder. By systematically varying the Ca/Sr atomic ratio from 1:0 to 0.7:0.3, we observed significant changes in atomic composition and lattice arrangement, leading to controlled lattice distortion without a phase transition. This structural modification resulted in a progressive red-shift of the Eu²⁺ emission band maximum from 479 nm to 512 nm. Through comprehensive spectroscopic and crystal structure analysis, we elucidated the underlying mechanisms governing photoluminescence intensity variation, emission band shift, and thermal stability, with particular emphasis on the role of local structural modifications. The practical application potential of these synthesized phosphors was demonstrated through the fabrication of full-spectrum white light sources using UV-LED chips, highlighting their promising prospects in solid-state lighting technology.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121292"},"PeriodicalIF":3.3,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068674","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":"Mixed-halide quasi-two-dimensional blue-emitting perovskite light-emitting diodes based on dual-spacer ligand modulation","authors":"Shilei Yu ,&nbsp;Zhiqiang Bao ,&nbsp;Xiaoyang Guo ,&nbsp;Ying Lv ,&nbsp;Tienan Wang ,&nbsp;Xingyuan Liu","doi":"10.1016/j.jlumin.2025.121287","DOIUrl":"10.1016/j.jlumin.2025.121287","url":null,"abstract":"<div><div>The development of high-performance blue perovskite light-emitting diodes (PeLEDs) continues to face significant challenges in achieving both spectral stability and device efficiency required for practical applications in full-color displays and solid-state lighting. Herein, we propose a dual-spacer ligand strategy to address these limitations through precise phase distribution control in mixed-halide quasi-two-dimensional (quasi-2D) perovskites. By leveraging the synergistic competition between phenylethylammonium bromide (PEABr) and propylammonium bromide (PABr) ligands, we achieve optimized phase composition with suppressed formation of small-n phases (n ≤ 3) while promoting dominant emission from larger-n phases, thereby minimizing energy funneling losses during interphase energy transfer. The optimized dual-ligand system (1:1 PEABr:PABr ratio) yields blue-emitting PeLEDs demonstrating remarkable performance metrics: stable electroluminescence at 485 nm with a peak external quantum efficiency of 7.3 %, maximum luminance of 755 cd m⁻², and operational lifetime (T₅₀) of 660 s at initial luminance of 100 cd m⁻². This work provides fundamental insights into phase engineering of quasi-2D perovskites while establishing a practical pathway toward spectrally stable mixed-halide blue-emitting PeLEDs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121287"},"PeriodicalIF":3.3,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935337","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 luminescence of Sn2+/Mn2+ codoped phosphate glasses for W-LEDs","authors":"Xiaoman Li ,&nbsp;Ruijin Fan ,&nbsp;Pengfei Zhai ,&nbsp;Xinyu Liu ,&nbsp;Huijun Liu ,&nbsp;Shitong Xu ,&nbsp;Rongfei Wei ,&nbsp;Hai Guo","doi":"10.1016/j.jlumin.2025.121289","DOIUrl":"10.1016/j.jlumin.2025.121289","url":null,"abstract":"<div><div>The demands for white-light-emitting materials are becoming more and more rigorous. In this work, a novel kind of Sn²⁺/Mn²⁺ doped phosphate aluminum calcium glass was fabricated by a traditional melt-quenching technique. Broadband excitation and emission of Sn²⁺ ions were detected in Sn²⁺ single-doped glass samples. By the modulation of excitation wavelength, tunable broadband cyan-blue light emissions of Sn²⁺ were also realized. Combined with the red light emitting of Mn²⁺ ions, a nearly white light with a good chromaticity coordinate (0.339, 0.298) and a relatively low correlated color temperature (CCT) of 5107 K was obtained in Sn²⁺/Mn²⁺ codoped glasses due to the energy transfer process from Sn²⁺ to Mn²⁺ ions. In addition, after two cycles of heating and cooling treatment, the emission intensity of Sn²⁺ doped glass sample remained 97.9 % of the initial emission intensity at 300 K. All of these results reveal that these Sn²⁺/Mn²⁺ doped aluminum calcium phosphate glasses have good resistance to thermal impacts and have prospects in white-light-emitting diodes (W-LEDs) fields.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121289"},"PeriodicalIF":3.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935338","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":"Structural and spectra studies of Dy3+-doped tellurite glass regulated by alkaline earth metals","authors":"Jiapeng Li ,&nbsp;Chunsheng Sun ,&nbsp;Yu Yue ,&nbsp;Xue Wang","doi":"10.1016/j.jlumin.2025.121288","DOIUrl":"10.1016/j.jlumin.2025.121288","url":null,"abstract":"<div><div>In this study, the effects exerted by diverse alkali earth metals concerning the physical properties, microstructure, and spectral properties of Dy³⁺ doped tellurite glass are deliberated. This structure has been inspected through FTIR and Raman spectroscopy. The discoveries reveal that [TeO₄] into numerous [TeO₃] and [TeO₃₊₁] polyhedral units when the alkali earth metal changes from Mg to Ba. The Judd-Ofelt strength parameters are attained and evaluated on the absorption spectra found. The emission intensity rises steadily as the alkali earth metal varies from Mg to Ba, which is associated with the local environment asymmetry surrounding Dy³⁺ ions. The optical parameters were calculated, and the radiation properties of this emission transition were investigated. The CIE chromaticity coordinates are all positioned within the warm white region. These results imply that the preparation of Dy³⁺ doped alkaline earth tellurite glass possesses the potential to function as an optimal material for white fiber lasers.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121288"},"PeriodicalIF":3.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929385","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}