Journal of Luminescence最新文献

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Dual-mode optical thermometers and optical fiber temperature sensor based on La2MoO6: Er3+, Yb3+ phosphors
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-19 DOI: 10.1016/j.jlumin.2025.121096
Xutong Wang, Shuyang Chen, Shiqing Xu, Liang Chen
{"title":"Dual-mode optical thermometers and optical fiber temperature sensor based on La2MoO6: Er3+, Yb3+ phosphors","authors":"Xutong Wang,&nbsp;Shuyang Chen,&nbsp;Shiqing Xu,&nbsp;Liang Chen","doi":"10.1016/j.jlumin.2025.121096","DOIUrl":"10.1016/j.jlumin.2025.121096","url":null,"abstract":"<div><div>For the first time, a straightforward optical fiber temperature sensing system based on La<sub>2</sub>MoO<sub>6</sub>:Er<sup>3+</sup>, Yb<sup>3+</sup> phosphors is proposed. The La<sub>2</sub>MoO<sub>6</sub>: Er<sup>3+</sup>, Yb<sup>3+</sup> phosphors were synthesized successfully using the molten salt method. A dual-mode temperature measurement technique based on the fluorescence intensity ratio (FIR) is introduced. The thermally coupled energy levels (<sup>2</sup>H<sub>11/2</sub> and <sup>4</sup>S<sub>3/2</sub>) and non-thermally coupled levels (<sup>2</sup>H<sub>11/2</sub> and <sup>4</sup>F<sub>9/2</sub>) exhibit maximum relative sensitivities of 1.24 % K<sup>−1</sup> and 0.79 % K<sup>−1</sup> at 293 K, respectively. The temperature resolution achieved was below 0.5 K. By utilizing the phosphor and optical fiber temperature sensor, real-time and accurate temperature monitoring was achieved, with a temperature deviation of less than 0.5 K. The optical fiber temperature sensor system provides exceptional reversibility and stability, while also playing a crucial role in precise remote temperature measurements under challenging conditions.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121096"},"PeriodicalIF":3.3,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139047","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}
引用次数: 0
High-efficiency and thermally stable Cr3+-doped BaSiF6 fluoride phosphors for broadband near-infrared LED applications
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-17 DOI: 10.1016/j.jlumin.2025.121086
Wei Wan , Man Li , Jingyan Jiang , Yifei Zhao , Yayun Zhou
{"title":"High-efficiency and thermally stable Cr3+-doped BaSiF6 fluoride phosphors for broadband near-infrared LED applications","authors":"Wei Wan ,&nbsp;Man Li ,&nbsp;Jingyan Jiang ,&nbsp;Yifei Zhao ,&nbsp;Yayun Zhou","doi":"10.1016/j.jlumin.2025.121086","DOIUrl":"10.1016/j.jlumin.2025.121086","url":null,"abstract":"<div><div>Broadband near-infrared (NIR) light sources have emerged as crucial components in a wide array of technological applications, spanning from advanced imaging systems to night vision devices and healthcare therapy. The advent of light-emitting diodes (LEDs) has unlocked new opportunities for broadband NIR phosphor-converted LEDs (NIR pc-LEDs), characterized by improved efficiency, compact form factors, and low operating temperatures. However, high-performance NIR phosphors for high-power LEDs remain scarce. In this work, Cr<sup>3+</sup>-doped fluorides BaSiF<sub>6</sub>:<em>x</em>Cr<sup>3+</sup> (where x ranges from 2.5 % to 15 %) have been designed and synthesized, which offer high quantum efficiency and thermal stability to maintain ∼80 % intensity at 450 K. Theoretical simulations demonstrate that BaSiF<sub>6</sub>, with a sufficiently large electronic bandgap of 7.8 eV, possesses the full potential to host NIR luminescent activators. Furthermore, molecular dynamics (MD) simulations validate its good thermal stability, enduring high temperatures exceeding 600 K annealing. The fabricated NIR pc-LED device using BaSiF<sub>6</sub>:Cr<sup>3+</sup> demonstrates high light output power and photoelectric efficiency under multiple driven currents, making it suitable for a wide range of applications as NIR light source. Capitalizing on the above merits, a prototype NIR transmission detector is demonstrated for potential applications in non-invasive material inspection and security systems. This research expands the repertoire of high-performance NIR phosphors for multifunctional use.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121086"},"PeriodicalIF":3.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138927","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}
引用次数: 0
Photoluminescence-based temperature sensing in Nd³⁺-Doped tellurite glasses
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-17 DOI: 10.1016/j.jlumin.2025.121090
Arthur S.B.Z. Alves , Nilmar S. Camilo , José C.S. Filho , Jorge E. Mabjaia , Viviane Pilla , Noelio O. Dantas , Acácio A. Andrade
{"title":"Photoluminescence-based temperature sensing in Nd³⁺-Doped tellurite glasses","authors":"Arthur S.B.Z. Alves ,&nbsp;Nilmar S. Camilo ,&nbsp;José C.S. Filho ,&nbsp;Jorge E. Mabjaia ,&nbsp;Viviane Pilla ,&nbsp;Noelio O. Dantas ,&nbsp;Acácio A. Andrade","doi":"10.1016/j.jlumin.2025.121090","DOIUrl":"10.1016/j.jlumin.2025.121090","url":null,"abstract":"<div><div>Tellurite glasses doped with varying concentrations of Nd<sup>3+</sup> ions (1–4 mol%) were synthesized via the melt-quenching method and investigated for their potential application in temperature sensing. Raman spectroscopy confirmed the amorphous nature of the glass matrix and revealed minimal structural changes upon Nd<sup>3+</sup> incorporation. Optical absorption spectra exhibited characteristic Nd<sup>3+</sup> bands, confirming successful doping. Temperature-dependent photoluminescence measurements (303–573 K) under 532 nm excitation revealed a significant variation in the intensity ratio between the <sup>4</sup>F<sub>5/2</sub>+<sup>2</sup>H<sub>9/2</sub> → <sup>4</sup>I<sub>9/2</sub> (806 nm) and <sup>4</sup>F<sub>3/2</sub> → <sup>4</sup>I<sub>9/2</sub> (890 nm) transitions of Nd<sup>3+</sup>. This luminescence intensity ratio exhibited a temperature dependence, demonstrating the material's potential as an optical thermometer. The relative sensitivity of 1.62 % K<sup>−1</sup> was calculated and found to be maximal near room temperature, highlighting the suitability of the material for this temperature range. The photoluminescence decay curves provided insights into the energy transfer processes and non-radiative decay pathways affecting the luminescence dynamics. The results demonstrate the potential of Nd<sup>3+</sup>-doped tellurite glass as a sensitive and reliable optical temperature sensor, particularly for applications near room temperature.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121090"},"PeriodicalIF":3.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139048","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}
引用次数: 0
Fabrication of multimodal optical imaging agents through direct triplet energy transfer from rare-earth doped nanoparticles
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-17 DOI: 10.1016/j.jlumin.2025.121092
Zijian Xiao, Kangru Wang, Xinyang Lu, Xiaojun Sun, Feng Lu
{"title":"Fabrication of multimodal optical imaging agents through direct triplet energy transfer from rare-earth doped nanoparticles","authors":"Zijian Xiao,&nbsp;Kangru Wang,&nbsp;Xinyang Lu,&nbsp;Xiaojun Sun,&nbsp;Feng Lu","doi":"10.1016/j.jlumin.2025.121092","DOIUrl":"10.1016/j.jlumin.2025.121092","url":null,"abstract":"<div><div>Fluorescence imaging in the 1500–1700 nm region (NIR-IIb) enables high resolution intravital imaging with deep tissue penetration. Meanwhile, afterglow imaging provides large signal-to-background ratio due to the absence of autofluorescence. These two imaging modalities represent the most advanced optical imaging techniques, and their combination would significantly improve the reliability of optical imaging. Herein, core-shell rare-earth nanoparticle (NaYF<sub>4</sub>:Yb,Er,Ce@NaYF<sub>4</sub>:Nd), photosensitizer chlorin e6, and <sup>1</sup>O<sub>2</sub> responsive afterglow polymer were integrated together to fabricate multifunctional nanoprobes. The Nd<sup>3+</sup>-rich sensitizing shell enables the NIR-IIb luminescence of Er<sup>3+</sup> around 1550 nm through the tandem energy transfer (Nd→Yb→Er). Meanwhile, the direct triplet energy transfer from Nd<sup>3+</sup> <sup>4</sup>F<sub>3/2</sub> state to the chlorin e6 triplet level offers efficient <sup>1</sup>O<sub>2</sub> generation under 808 nm, which further reacts with the polymer to produce afterglow emission. The superiority of afterglow and NIR-IIb imaging were verified both in vitro and in vivo. Whole-body blood vessel imaging can be achieved with high resolution and contrast in living mice, a capillary with a diameter of 0.23 mm was unambiguously observed. As the first nanoprobes capable of NIR-IIb and afterglow imaging under 808 nm excitation, the nanoparticles also afford great potential for various applications in bioimaging and diagnostics.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121092"},"PeriodicalIF":3.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139046","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}
引用次数: 0
On the luminescent properties of Eu3+ doped La2Hf3(WO4)9
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-17 DOI: 10.1016/j.jlumin.2025.121091
Julia Goldmann, Tim Pier, Thomas Jüstel
{"title":"On the luminescent properties of Eu3+ doped La2Hf3(WO4)9","authors":"Julia Goldmann,&nbsp;Tim Pier,&nbsp;Thomas Jüstel","doi":"10.1016/j.jlumin.2025.121091","DOIUrl":"10.1016/j.jlumin.2025.121091","url":null,"abstract":"<div><div>This work concerns the host material La<sub>2</sub>Hf<sub>3</sub>(WO<sub>4</sub>)<sub>9</sub> doped with Eu<sup>3+</sup> as a widely applied red emitting activator, focusing on its luminescent properties under various excitation conditions. La<sub>2-x</sub>Eu<sub>x</sub>Hf<sub>3</sub>(WO<sub>4</sub>)<sub>9</sub> solid solutions were synthesized and confirmed to crystallize in a single-phase structure. The reflectivity decreases with increasing Eu³⁺ doping level, while characteristic Eu³⁺ electronic transitions emerge, enhancing absorption strength and emission intensity. Emission spectra under various excitation conditions (395 nm; 160 nm; X-rays) reveal concentration-dependent characteristic Eu³⁺ luminescence behavior with stable peak positions and red emission profiles. Under X-ray excitation, luminescence peaks at 10 % Eu³⁺ doping, followed by intensity quenching at higher concentrations due to non-radiative mechanisms. The depth of X-ray penetration, calculated using the Feldman equation, correlates with the observed luminescence efficiency. The materials exhibit a rather low thermal quenching temperature, with T<sub>1/2</sub> determined as 228 K. Lifetime measurements highlight concentration quenching effects and distinct Eu³⁺ environments. Chromaticity coordinates confirm a consistent red emission with minor variations across doping levels. The study provides insights into the structural, optical, and thermal properties of Eu³⁺-doped La₂Hf₃(WO₄)₉, emphasizing its potential and limitations for luminescent applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121091"},"PeriodicalIF":3.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138945","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}
引用次数: 0
Cross-relaxation processes in Nd-doped selenide glass and 5.7 μm laser action in it
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-17 DOI: 10.1016/j.jlumin.2025.121089
M.P. Frolov , B.I. Denker , B.I. Galagan , V.V. Koltashev , V.G. Plotnichenko , YaK. Skasyrsky , M.V. Sukhanov , S.E. Sverchkov , A.P. Velmuzhov
{"title":"Cross-relaxation processes in Nd-doped selenide glass and 5.7 μm laser action in it","authors":"M.P. Frolov ,&nbsp;B.I. Denker ,&nbsp;B.I. Galagan ,&nbsp;V.V. Koltashev ,&nbsp;V.G. Plotnichenko ,&nbsp;YaK. Skasyrsky ,&nbsp;M.V. Sukhanov ,&nbsp;S.E. Sverchkov ,&nbsp;A.P. Velmuzhov","doi":"10.1016/j.jlumin.2025.121089","DOIUrl":"10.1016/j.jlumin.2025.121089","url":null,"abstract":"<div><div>It was found that the low-lying levels of Nd<sup>3+</sup> (<sup>4</sup>I<sub>15/2</sub> and <sup>4</sup>I<sub>13/2</sub>) in selenide glass are the subject to intense cross-relaxation at the concentration of 10<sup>20</sup> ions per cm<sup>3</sup>. This circumstance allowed to implement a cross-relaxation pumping scheme of a ∼5.7 μm Nd-doped selenide glass laser. The laser was pumped at 2.53 μm into the absorption band corresponding to <sup>4</sup>I<sub>13/2</sub> level. The upper laser level <sup>4</sup>I<sub>11/2</sub> was excited due to the cross-relaxation process producing two ions at the upper laser level per each pump photon. Output energy of up to 26 mJ at a slope efficiency of 12 % was demonstrated.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121089"},"PeriodicalIF":3.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138950","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}
引用次数: 0
Axial and radial random lasing in a biopolymer based liquid core ring resonator
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-17 DOI: 10.1016/j.jlumin.2025.121085
Mitty George , I. Hubert Joe , M. Kailasnath
{"title":"Axial and radial random lasing in a biopolymer based liquid core ring resonator","authors":"Mitty George ,&nbsp;I. Hubert Joe ,&nbsp;M. Kailasnath","doi":"10.1016/j.jlumin.2025.121085","DOIUrl":"10.1016/j.jlumin.2025.121085","url":null,"abstract":"<div><div>Tunable random lasing from a liquid core cylindrical microcavity by transversely pumping a silica capillary filled with a BSA (Bovine Serum Albumin)-Rhodamine B (RhB) composite biopolymer solution is reported. The binding of RhB to discrete sites of BSA mediates the structural arrangement of lasing species, influencing the stimulated emission and tunability. The UV–Vis, Photoluminescence (PL), FTIR spectroscopy and molecular docking studies were used to analyze the dye binding with BSA. Laser emission was collected from the surface as well as the end of the capillary upon transverse pumping along its length. The optical feedback from the cavity effects of the cylindrical microstructure enhances the random lasing modes. Lasing threshold and red shift in the emission were found to be tunable with BSA concentrations. The surface emissions were characterized by sharp and distinct lasing peaks at low thresholds in contrast to the relatively broad end emissions requiring a four-fold pump pulse energy at a BSA concentration of 0.6 g/ml. This difference in lasing threshold is in agreement with the Power Fourier Transform (PFT) analysis of the surface and end emissions. The cavity path lengths corresponding to the surface and end emissions were analyzed and the shorter path length for surface emissions favours the formation of coherent loops of photons and a lower lasing threshold. The coexistence of surface and end emissions with entirely different characteristics from the capillary and its tunability opens up new avenues in the development of biomaterial-based integrated light sources for sensing, display technology and encryption.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121085"},"PeriodicalIF":3.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139070","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}
引用次数: 0
Triplet reflection at boundaries of grains and its influence on optical and scintillation characteristics of organic composite detectors
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-16 DOI: 10.1016/j.jlumin.2025.121087
I. Khromiuk, A. Krech, E. Martynenko, O. Tarasenko
{"title":"Triplet reflection at boundaries of grains and its influence on optical and scintillation characteristics of organic composite detectors","authors":"I. Khromiuk,&nbsp;A. Krech,&nbsp;E. Martynenko,&nbsp;O. Tarasenko","doi":"10.1016/j.jlumin.2025.121087","DOIUrl":"10.1016/j.jlumin.2025.121087","url":null,"abstract":"<div><div>The work investigates composite scintillators based on <em>p</em>-terphenyl grains (both pure and doped) with sizes ranging from less than 0.04 mm–1.0 mm, which are excited by both optical radiation and alpha particles from <sup>239</sup>Pu. For composite scintillators based on micrograins, significantly higher intensity of the delayed fluorescence was observed under optical excitation compared to the reference single crystals. It was found that the relative light output for composite scintillators increases with the grain size. Furthermore, for samples with grain sizes &lt;60 μm, an abnormally high relative light output was observed. These experimental results are analysed in terms of the impact of the triplet exciton reflection effect at the boundaries of micro-sized grains. Mathematical estimates of the effect's influence are made for the cases where the grains are modelled as spheres or cubes. It is shown that the approximation of cubic-shaped grains more accurately explains the light output results than the approximation of spherical-shaped grains.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121087"},"PeriodicalIF":3.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139045","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}
引用次数: 0
LaSc3(BO3)4:Eu3+&g-C3N4 composite phosphor for dual-mode temperature sensing
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-13 DOI: 10.1016/j.jlumin.2025.121084
JieYing Shang , Qian Liao , XingYu Zhao , Fangfang Hu , Hai Guo
{"title":"LaSc3(BO3)4:Eu3+&g-C3N4 composite phosphor for dual-mode temperature sensing","authors":"JieYing Shang ,&nbsp;Qian Liao ,&nbsp;XingYu Zhao ,&nbsp;Fangfang Hu ,&nbsp;Hai Guo","doi":"10.1016/j.jlumin.2025.121084","DOIUrl":"10.1016/j.jlumin.2025.121084","url":null,"abstract":"<div><div>In this paper, g-C<sub>3</sub>N<sub>4</sub> and LaSc<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub>:Eu<sup>3+</sup> (LSB:Eu<sup>3+</sup>) phosphors were successfully fabricated through a high-temperature solid-phase approach. The luminescent intensity of LSB:Eu<sup>3+</sup> and g-C<sub>3</sub>N<sub>4</sub> exhibited distinct response patterns to temperature, enabling their luminescence intensity ratio to serve as a reliable indicator for temperature characterization. Composite phosphors were obtained by mixing LSB:Eu<sup>3+</sup> and g-C<sub>3</sub>N<sub>4</sub> at various mass ratios (1:1, 3:1, 5:1), followed by studying their variable temperature spectra within the range of 313–573 K were studied. The results demonstrated that the composite phosphor achieved a maximum absolute sensitivity of 0.24 % K<sup>−1</sup>@573 K and a maximum relative sensitivity of 1.16 % K<sup>−1</sup>@313 K, respectively. Furthermore, the luminescent color of composite phosphor shifted from violet to red as the temperature increased, enabling temperature characterization based on CIE coordinates of spectra. Notably, a maximum color shift of 0.246 at 573 K was observed due to thermochromic effects, which facilitated dual-mode self-calibration for temperature measurement. In summary, g-C<sub>3</sub>N<sub>4</sub> and LSB:Eu<sup>3+</sup> composite phosphors exhibit significant potential for applications in self-calibration temperature sensing.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121084"},"PeriodicalIF":3.3,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138952","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}
引用次数: 0
Synergistic Ce3+, Tb3+ activated LaCaAl3O7 phosphor: Bridging forensic science with advanced w-LEDs applications
IF 3.3 3区 物理与天体物理
Journal of Luminescence Pub Date : 2025-01-11 DOI: 10.1016/j.jlumin.2025.121080
I.S. Pruthviraj , B.R. Radha Krushna , S.C. Sharma , H.B. Premkumar , K. Manjunatha , Sheng Yun Wu , Swati Mishra , Lambodaran Ganesan , D. Ganesh Kumar , Augustine George , J.B. Prasanna Kumar , H. Nagabhushana
{"title":"Synergistic Ce3+, Tb3+ activated LaCaAl3O7 phosphor: Bridging forensic science with advanced w-LEDs applications","authors":"I.S. Pruthviraj ,&nbsp;B.R. Radha Krushna ,&nbsp;S.C. Sharma ,&nbsp;H.B. Premkumar ,&nbsp;K. Manjunatha ,&nbsp;Sheng Yun Wu ,&nbsp;Swati Mishra ,&nbsp;Lambodaran Ganesan ,&nbsp;D. Ganesh Kumar ,&nbsp;Augustine George ,&nbsp;J.B. Prasanna Kumar ,&nbsp;H. Nagabhushana","doi":"10.1016/j.jlumin.2025.121080","DOIUrl":"10.1016/j.jlumin.2025.121080","url":null,"abstract":"<div><div>In this study, we introduce a novel Ce<sup>3+</sup>/Tb<sup>3+</sup> co-activated LaCaAl<sub>3</sub>O<sub>7</sub> (LCAO) green-emitting phosphor, prepared via a solution combustion route using <em>Aloe Vera</em> <em>(A.V.)</em> gel as fuel. Detailed photoluminescence (PL) analysis revealed intense green emission at 542 nm with high internal quantum efficiency (<em>I</em><sub><em>QE</em></sub>) of 89.9 %, under 330 nm ultra-violet (UV) excitation. Energy transfer (ET) from Ce<sup>3+</sup> to Tb<sup>3+</sup> ions was optimized, achieving ideal doping concentrations of 7 mol % Ce<sup>3+</sup> and 3 mol % Tb<sup>3+</sup>. We fabricated a prototype near-UV (n-UV)-pumped white-LED (w-LED) device using LCAO:7%Ce<sup>3+</sup>,3%Tb<sup>3+</sup> phosphor as a color converter. Operating at a 120 mA current, the LED emitted bright cool-white light with outstanding CIE chromaticity coordinates (0.3245, 0.3322), a high colour correlated temperature CCT of 5879 K, and an ultra-high color rendering index (CRI) of R<sub>a</sub> = 95. Additionally, it demonstrated a luminous efficacy (LE) of 28.65 lm·W⁻<sup>1</sup>. The phosphor also exhibited remarkable thermal stability and resistance to color shift from 300 to 480 K, indicating suitability for high-performance lighting. Moreover, the optimized phosphor showed great potential for high-resolution latent fingerprint (LFP) detection. This work provides a promising approach for designing efficient LED phosphors, contributing to advanced solid-state lighting and forensic applications. Our findings establish LCAO:7%Ce<sup>3+</sup>,3%Tb<sup>3+</sup> as a versatile material with significant implications for high-quality lighting and security technologies.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121080"},"PeriodicalIF":3.3,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138947","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}
引用次数: 0
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