Zebin Wang , Xinyu Han , Jian Liu , Qingsong Song , Dahua Zhou , Xiaodong Xu , Jun Xu , Kheirreddine Lebbou
{"title":"Potential of Yb-doped CALYSO single crystal fiber as a laser medium for ultrashort laser operation","authors":"Zebin Wang , Xinyu Han , Jian Liu , Qingsong Song , Dahua Zhou , Xiaodong Xu , Jun Xu , Kheirreddine Lebbou","doi":"10.1016/j.jlumin.2025.121311","DOIUrl":"10.1016/j.jlumin.2025.121311","url":null,"abstract":"<div><div>For the first time, single crystal fibers of 2 at.% Yb:CaYAlO<sub>4</sub> (Yb:CALYO) and Yb:CaY<sub>0.95</sub>Sc<sub>0.05</sub>AlO<sub>4</sub> (Yb:CALYSO) were successfully grown using the LHPG method. The structure, absorption, emission, and lifetime characteristics of Yb:CALYO and Yb:CALYSO single crystal fibers were systematically investigated. Additionally, the influence of Yb<sup>3+</sup> concentration on these properties was examined. The absorption cross-sections of Yb:CALY(S)O single crystal fibers were calculated, revealing that the strongest absorption peaks are located at 979 nm. The emission cross-sections for 2 at.% Yb:CALYO and Yb:CALYSO crystal fibers were determined to be 0.88 × 10<sup>−20</sup> cm<sup>2</sup> at 982 nm and 0.81 × 10<sup>−20</sup> cm<sup>2</sup> at 983 nm, with full widths at half maximum (FWHM) of 85.37 nm and 88.34 nm, respectively, corresponding to the transition of <sup>2</sup>F<sub>5/2</sub> → <sup>2</sup>F<sub>7/2</sub>. The fluorescence lifetimes of the <sup>2</sup>F<sub>5/2</sub> energy level for Yb:CALY(S)O crystal fibers with a concentration of 2 at.% were calculated to be 706 μs and 682 μs, respectively. The experimental results indicate that Yb:CALYSO crystal fiber holds potential as a laser medium for ultrashort laser operation.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"285 ","pages":"Article 121311"},"PeriodicalIF":3.3,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170634","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":"Ultraviolet-C emitting device based on Bi3+-activated orthophosphate films in electrolyte-assisted silicon semiconductor","authors":"Mohammad M. Afandi, Jongsu Kim","doi":"10.1016/j.jlumin.2025.121313","DOIUrl":"10.1016/j.jlumin.2025.121313","url":null,"abstract":"<div><div>Electrolyte-assisted semiconductors have garnered significant interest as an innovative category and promising candidates for the development of modern electronics. Herein, we propose an optoelectronic device based on an electrolyte-assisted semiconductor, so-called electrolyte-assisted electroluminescence (EEL) with ultraviolet-C (UVC) emission from Bi<sup>3+</sup>-activated orthophosphate films. The electrolyte in this approach acts as the carrier transfer layer generated from the electrochemical reaction during the sinusoidal source operation. By incorporating Bi<sup>3+</sup> ions into lanthanum orthophosphate films (YPO<sub>4</sub> and LuPO<sub>4</sub>), a UVC emission peaking at 251 nm is observed, attributed to electronic transitions of Bi<sup>3+</sup> within the host lattices. Compared to traditional EL devices, our EEL device operates at a lower voltage and frequency (30 V, 50 Hz), reducing the load on electrical sources. Additionally, it demonstrates decent reliability, maintaining 50 % of its emission intensity after 20 min of continuous operation without any encapsulation. Moreover, compared to other UVC sources, our EEL device offers advantages such as a low-cost manufacturing process and being mercury-free. Thus, this approach could further expand the practical application of the electrolyte-based semiconductor that emits UVC for sterilization technology.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121313"},"PeriodicalIF":3.3,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124010","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":"Broadband NIR luminescence of Te-doped barium borate glass for gc-LED device applications","authors":"Mingjun Zhao , Chongyun Shao , Weichang Li , Danping Chen , Wei Chen","doi":"10.1016/j.jlumin.2025.121314","DOIUrl":"10.1016/j.jlumin.2025.121314","url":null,"abstract":"<div><div>A strong near-infrared (NIR) fluorescent borate glass doped with tellurium (Te) clusters was developed, and spectral properties were studied. Under an oxidizing atmosphere, Te clusters could not be formed; however, under a reducing atmosphere, broadband Te-cluster NIR emission covering 600–1400 nm was successfully achieved, with a peak centered at 900 nm and a full width at half maximum (FWHM) of 270 nm. The findings demonstrated that adjusting the glass composition and TeO<sub>2</sub> doping concentration can significantly enhance the NIR emission of Te-doped borate glass. Furthermore, the study revealed that the photoluminescence performance of this material is highly sensitive to both temperature and excitation wavelength, demonstrating its potential for tunable luminescent properties. A NIR glass-converted LED (gc-LED) device was fabricated by integrating Te-cluster-doped borate glass with a commercial 460 nm LED, demonstrating its potential applications in night vision, non-destructive testing, and biomedical imaging. This research provides a theoretical foundation and technical pathway for developing novel ultra-broadband NIR emission glass materials.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121314"},"PeriodicalIF":3.3,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108219","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}
Johan Lub , Sylvain L.J. Hamon , Zhuo Li , Paul A. van Hal , Ton J. Visser , Rifat A.M. Hikmet
{"title":"Synthesis and properties of organic fluorescent molecules for blue to red conversion for LED systems using energy transfer","authors":"Johan Lub , Sylvain L.J. Hamon , Zhuo Li , Paul A. van Hal , Ton J. Visser , Rifat A.M. Hikmet","doi":"10.1016/j.jlumin.2025.121309","DOIUrl":"10.1016/j.jlumin.2025.121309","url":null,"abstract":"<div><div>The efficiency of color conversion in remote phosphor light emitting diode (LED) applications can be improved by direct blue to red conversion instead of blue to yellow to red conversion. In this publication, two molecules that have chemically linked blue light absorbing donor and red emitting acceptor moieties were synthesized in which the blue to red conversion takes place via Förster resonance energy transfer (FRET). The properties of these so called “FRET molecules” were studied in poly(methyl methacrylate) (PMMA) films and compared with those of the parent yellow and red fluorescent molecules. The quantum efficiency (QE) of these films depends strongly on the chemical structure of the blue light absorbing moiety. The molecule with high QE showed an increased photochemical stability of the blue light absorbing moiety compared to that of the parent yellow fluorescent molecule and a decreased photochemical stability of the red emitting moiety compared to that of the parent red fluorescent molecule.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"284 ","pages":"Article 121309"},"PeriodicalIF":3.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124009","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}
Anna Tsibulnikova , Vasily Slezhkin , Evgeniya Zemlyakova , Alena Kostrina , Dmitry Artamonov , Ilia Samusev , Valery Bryukhanov , Anna Kundalevich , Elizaveta Demishkevich , Alina Bakhtiyarova , Olga Babich , Matheus Mantuanelli Roberto , Stanislav Suckhikh
{"title":"Molecular luminescent complex of Tagetes patula L. antioxidants with porphyrin and singlet oxygen generation","authors":"Anna Tsibulnikova , Vasily Slezhkin , Evgeniya Zemlyakova , Alena Kostrina , Dmitry Artamonov , Ilia Samusev , Valery Bryukhanov , Anna Kundalevich , Elizaveta Demishkevich , Alina Bakhtiyarova , Olga Babich , Matheus Mantuanelli Roberto , 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, Dexin Liu, 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 Li<sub>2</sub>CaTa<sub>2</sub>O<sub>7</sub>:Ln<sup>3+</sup> (Ln<sup>3+</sup> = Pr<sup>3+</sup>, Er<sup>3+</sup>) phosphors were investigated. Under the 450 nm blue light excitation, Li<sub>2</sub>CaTa<sub>2</sub>O<sub>7</sub>:Pr<sup>3+</sup> 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 Li<sub>2</sub>CaTa<sub>2</sub>O<sub>7</sub>:Er<sup>3+</sup> 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 (Pr<sup>3+</sup>) and 528 nm (Er<sup>3+</sup>) show a slight enhancement. Based on the distinct temperature dependencies of the thermally coupled levels of Pr<sup>3+</sup> and Er<sup>3+</sup>, the relative sensitivity (<em>S</em><sub>r</sub>) and absolute sensitivity (<em>S</em><sub>a</sub>) of the samples were calculated using the fluorescence intensity ratio (<em>FIR</em>) method. The maximum <em>S</em><sub>r</sub> values for Pr<sup>3+</sup> and Er<sup>3+</sup> in the Li<sub>2</sub>CaTa<sub>2</sub>O<sub>7</sub> host were found to be 3.072 % K<sup>−1</sup> at 120 K and 7.739 % K<sup>−1</sup> at 140 K, respectively. These results demonstrate the excellent thermometric performance of Li<sub>2</sub>CaTa<sub>2</sub>O<sub>7</sub>:Ln<sup>3+</sup> (Ln<sup>3+</sup> = Pr<sup>3+</sup>, Er<sup>3+</sup>), 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}
Xueliang Zhang , Xiaoman Zhang , Xiaodong Zhang , Lefu Mei , Luoxin Wang , Hua Wang , Xiangming Li , Kun Nie
{"title":"High-sensitivity and high-output voltage lead-free perovskite-based fiber optoelectronic devices","authors":"Xueliang Zhang , Xiaoman Zhang , Xiaodong Zhang , Lefu Mei , Luoxin Wang , Hua Wang , Xiangming Li , 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 Bi<sup>3+</sup> 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><sub>33</sub> 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}
Yan Fan , Haoyi Wu , Yahong Jin , Yanmei Li , Yihua Hu
{"title":"Ultra-broadband near-infrared-I and II emission from chromium doped double perovskite for multifunction application","authors":"Yan Fan , Haoyi Wu , Yahong Jin , Yanmei Li , 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, Cr<sup>3+</sup>-doped double perovskite-type GdTiTaO<sub>6</sub> (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: 0.03Cr<sup>3+</sup> 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 GdTiTaO<sub>6</sub>: Cr<sup>3+</sup> 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, Muhammad Asad Riaz, 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 Cs<sub>2</sub>SnCl<sub>6</sub> double perovskite nanocrystals (NCs) capped with mercaptoacetic acid (MAAc) through various experimental investigations. To regulate and mediate the synthesis of Cs<sub>2</sub>SnCl<sub>6</sub> perovskite NCs, MAAc was employed as a capping agent. The X-rays diffraction analysis confirms the formation of Cs<sub>2</sub>SnCl<sub>6</sub> double perovskite with outstanding phase stability in cubic phase. The capping effect of Cs<sub>2</sub>SnCl<sub>6</sub> 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 Cs<sub>2</sub>SnCl<sub>6</sub> in ambient atmosphere. The genesis of steady-state PL and the PL decay kinetics of Cs<sub>2</sub>SnCl<sub>6</sub> 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 Cs<sub>2</sub>SnCl<sub>6</sub> 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 Cs<sub>2</sub>SnCl<sub>6</sub> 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}
Federica Scardaci , José I. Espeso , Diego Pérez-Francés , Graziella Malandrino , Rafael Valiente
{"title":"Highly sensitive optical nanothermometry using Er3+-doped GdOF nanoparticles: synthesis, characterization, and temperature sensing applications","authors":"Federica Scardaci , José I. Espeso , Diego Pérez-Francés , Graziella Malandrino , 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% Er<sup>3+</sup>-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 <sup>2</sup>H<sub>11/2</sub> and <sup>4</sup>S<sub>3/2</sub> levels of Er<sup>3+</sup> over the 294–423 K range. The results demonstrate a high sensitivity, with an absolute sensitivity of 3.07 × 10<sup>−3</sup> K<sup>−1</sup> at 423 K and a relative sensitivity of 1.25 % K<sup>−1</sup> at 294 K. These competitive values position Er<sup>3+</sup>-doped GdOF nanoparticles as promising candidates for temperature sensing applications in biomedicine and nanotechnology, offering advantages over other Er<sup>3+</sup>-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}