Journal of Luminescence最新文献

Concentration-dependent and color-tunable room temperature afterglow of carbon dots@boric acid composites 浓度依赖和颜色可调的碳dots@boric酸复合材料的室温余辉

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-14 DOI: 10.1016/j.jlumin.2025.121365

Jianliang Bai , Xuejia Zhang , Zidan Yin , Yanru Liu , Longlong Ma , Mengzhao Li , Cuixing Xu , Runfang Pei , Lili Ren

{"title":"Concentration-dependent and color-tunable room temperature afterglow of carbon dots@boric acid composites","authors":"Jianliang Bai , Xuejia Zhang , Zidan Yin , Yanru Liu , Longlong Ma , Mengzhao Li , Cuixing Xu , Runfang Pei , Lili Ren","doi":"10.1016/j.jlumin.2025.121365","DOIUrl":"10.1016/j.jlumin.2025.121365","url":null,"abstract":"<div><div>Color-tunable room temperature afterglow (RTA) materials have become excellent candidates for a wide range of applications in information encryption and anti-counterfeiting. However, the achievement of color-tunable afterglow materials in a simple way remains a considerable challenge. In recent years, carbon dots (CDs) have attracted more and more attention in preparing metal-free long afterglow materials. Herein, a convenient and low-cost strategy with different doping concentrations for the preparation of carbon dots@boric acid (CDs@BA) composites with ultralong lifetime RTA has been proposed. Excitingly, the CDs@BA-(Ⅰ, Ⅱ, Ⅲ and Ⅳ) composites not only have ultralong afterglow lifetimes, but also exhibit color-tunable properties ranging from turquoise to deep yellow afterglow. In addition, these CDs@BA composites have been successfully used in the optical pattern design of safety exit signs and hazardous material signs. These findings may provide a new approach for the design of CDs-based nanomaterials with ultralong and color-tunable afterglow under ambient conditions.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121365"},"PeriodicalIF":3.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279722","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

Machine learning-based predictions of the 4fn-4fn-15d1 UV absorption for Pr3+ and Ce3+ ions in fluoride and oxide compounds 基于机器学习的氟化物和氧化物中Pr3+和Ce3+离子的4fn-4fn-15d1紫外线吸收预测

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-11 DOI: 10.1016/j.jlumin.2025.121359

G. Dima , A.V. Racu , C.G. Ma , A.M. Srivastava , Ž. Antić , M.D. Dramićanin , M.G. Brik

{"title":"Machine learning-based predictions of the 4fn-4fn-15d1 UV absorption for Pr3+ and Ce3+ ions in fluoride and oxide compounds","authors":"G. Dima , A.V. Racu , C.G. Ma , A.M. Srivastava , Ž. Antić , M.D. Dramićanin , M.G. Brik","doi":"10.1016/j.jlumin.2025.121359","DOIUrl":"10.1016/j.jlumin.2025.121359","url":null,"abstract":"<div><div>The development of UV-C (100–280 nm) emitting phosphors utilizing the upconverted 4fn-15 d1→4fn interconfigurational broad band emission transition of lanthanide ions requires the fundamental understanding of the host-impurity interaction, which determines the positions of energy levels of the 4fn-15 d1 electronic configuration. In this work, we developed an ML Random Forest–based prediction algorithm utilizing a set of 22 dataset descriptors, such as structural characteristics of the host materials, electronic band gaps, ionic radii, and other material properties. The model was successfully tested across 46 impurity centers in various fluoride (chloride) and oxide compounds doped with the Pr3+ or Ce3+ ions. As an outcome of the developed model, predictions of the 4f-5d absorption wavelengths of Pr3+ and Ce3+ ions in the investigated hosts, were generated, demonstrating good correlation with the available literature data used initially for training. The obtained results indicate that host materials characterized by (i) a higher polyhedral volume (defined as the volume of the polyhedron formed by the impurity ion and its nearest neighbors), (ii) a higher coordination number (8 or 9), and (iii) high anion electronegativity—particularly fluorides doped with Pr3+ and Ce3+—may be of interest for applications in the UV-C domain. The resulting prediction model is characterized by the mean absolute errors between the predicted and literature data on the absorption wavelength of less than 3 nm only, which confirms the model's robust and effective performance. The approach developed in this work can be readily extended to other families of materials and/or dopant ions.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121359"},"PeriodicalIF":3.3,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279528","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

Tunable spectrum aqueous Ag-In-Zn-Ga-S quantum dots with high photoluminescence quantum yield 具有高光致发光量子产率的可调光谱水溶液Ag-In-Zn-Ga-S量子点

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-10 DOI: 10.1016/j.jlumin.2025.121355

Yikun He, Yongheng Fu, Danni Yan, Shuai Yang, Li Zhang, Jiajun Xu, Feifan Song, Xiaokun Zhang, Yuhui Dong, Yousheng Zou

{"title":"Tunable spectrum aqueous Ag-In-Zn-Ga-S quantum dots with high photoluminescence quantum yield","authors":"Yikun He, Yongheng Fu, Danni Yan, Shuai Yang, Li Zhang, Jiajun Xu, Feifan Song, Xiaokun Zhang, Yuhui Dong, Yousheng Zou","doi":"10.1016/j.jlumin.2025.121355","DOIUrl":"10.1016/j.jlumin.2025.121355","url":null,"abstract":"<div><div>In recent years, Ag-In-Ga-S (AIGS) quantum dots (QDs) have received widespread attention as non-toxic and environmentally friendly QDs. However, the low photoluminescence quantum yield (PLQY) restricts the further application of AIGS QDs in optoelectronic devices. Here, we constructed quinary Ag-In-Zn-Ga-S (AIZGS) QDs with outstandingly high PLQY of 92.1 % by doping Zn into AIGS QDs via an economical and environment-friendly hydrothermal method. The synergistic action of the internal doped Zn providing radiative recombination channels and the surface doped Zn passivating the non-radiative recombination defects leads to enhanced PLQY of QDs. The corresponding QDs backlight films fabricated based on AIZGS QDs and polyvinyl alcohol (PVA) also show a high PLQY of 82.7 %. The improved PLQY of AIZGS QDs is comparable to other toxic metal-containing QDs in the same spectrum. Furthermore, the PL peak wavelength of the QDs can be tuned from 545 nm to 616 nm by varying the Ag/In ratio. The realization of high PLQY in aqueous AIZGS QDs and its backlight films contributes to the application in the field of eco-friendly backlight display devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121355"},"PeriodicalIF":3.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271581","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

Optical temperature sensing in LaInO3:Er3+ by up-conversion emission exciting at 975 nm 975 nm上转换发射激发LaInO3:Er3+的光学温度传感

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-10 DOI: 10.1016/j.jlumin.2025.121357

Mauricio A. Vega-Pallauta , Rodrigo Castillo , Kevin Soler-Carracedo , Inocencio R. Martin

{"title":"Optical temperature sensing in LaInO3:Er3+ by up-conversion emission exciting at 975 nm","authors":"Mauricio A. Vega-Pallauta , Rodrigo Castillo , Kevin Soler-Carracedo , Inocencio R. Martin","doi":"10.1016/j.jlumin.2025.121357","DOIUrl":"10.1016/j.jlumin.2025.121357","url":null,"abstract":"<div><div>This work reports the luminescent properties of Er3+ ion-doped LaInO3 for temperature detection and measurement. The samples were synthesized using the Pechini sol-gel method, obtaining pure, homogeneous materials with non-defined morphology that agglomerate forming microspheres. Exciting at 975 nm, up-conversion was obtained with emission bands centered at 527, 542 and 675 nm, which are generated due to the absorption of two photons and an energy transfer mechanism. The ratio between 527 and 542 nm emissions, well known thermally coupled levels, was studied as a function of temperature in the range between 297 and 327 K using the luminescence intensity ratio technique. The thermometric parameters of absolute sensitivity, relative sensitivity, and uncertainty were obtained to evaluate the material's application in luminescent thermometry. The maximum sensitivity and relative sensitivity values found were 6.18 x 10−3 % K−1 at 417 K and 1.05 % K−1 at 297 K, while the uncertainty found was 0.07 K at 297 K and 0.15 K at 417 K. The uncertainty values are excellent due to the intense emission of the samples, leading to a very high signal/noise ratio.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121357"},"PeriodicalIF":3.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271582","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

Li+ induced enhancements in Eu3+→Eu2+ reduction and photoluminescence properties of Eu-doped KAlSi2O6 phosphors for WLED applications Li+诱导WLED应用中Eu3+→Eu2+还原和掺eu的KAlSi2O6荧光粉的光致发光性能的增强

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-10 DOI: 10.1016/j.jlumin.2025.121352

Panpan Li, Ruoshan Lei, Huanping Wang, Youjie Hua, Shiqing Xu

{"title":"Li+ induced enhancements in Eu3+→Eu2+ reduction and photoluminescence properties of Eu-doped KAlSi2O6 phosphors for WLED applications","authors":"Panpan Li, Ruoshan Lei, Huanping Wang, Youjie Hua, Shiqing Xu","doi":"10.1016/j.jlumin.2025.121352","DOIUrl":"10.1016/j.jlumin.2025.121352","url":null,"abstract":"<div><div>WLEDs have revolutionized modern lighting technologies, but the exploration of high-quality NUV-excited phosphors remains a significant challenge. Herein, we propose a Li+ co-doping strategy to regulate Eu valence states and enhance luminescence properties in silicate-based phosphors. A series of [K1-xLix]AlSi2O6: 0.02Eu (x = 0–0.08) phosphors are successfully synthesized via a solid-state reaction method. XRD and XPS analyses reveal that Li+ ions preferentially occupy the K+ sites in the KAlSi2O6 lattice, weakening K-O bonding energy and facilitating the Eu3+→Eu2+ reduction. Under 365 nm excitation, KAlSi2O6: 0.02Eu exhibits a broad Eu2+-related emission band (400–600 nm) and two narrow Eu3+-related peaks (593 and 612 nm). Incorporation of Li+ ions quenches Eu3+ emissions and enhances Eu2+ emission, peaking at x = 0.06. Moreover, [K0.94Li0.06]AlSi2O6: 0.02Eu demonstrates excellent thermal stability (85.45 % at 423 K) with negligible chromaticity shift (ΔE = ∼0.0022 in 293–463 K), attributed to its high structural rigidity and single emitting center. A WLED fabricated with [K0.94Li0.06]AlSi2O6: 0.02Eu achieves a high color rendering index (Ra = 90.4) and a moderate correlated color temperature (CCT = 4536 K). These findings not only highlight the potential of [K0.94Li0.06]AlSi2O6: 0.02Eu as a blue phosphor for human-centric WLEDs, but also provide a strategy for enhancing Eu3+→Eu2+ reduction efficiency in silicates.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121352"},"PeriodicalIF":3.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271579","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

Er:YScO3 mixed sesquioxide crystal fibers grown by the LHPG technique and optical characterization 利用LHPG技术生长Er:YScO3混合倍半氧化物晶体光纤及其光学特性

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-10 DOI: 10.1016/j.jlumin.2025.121360

Zhengyuan Jiang , Jian Liu , Longxin Liu , Jun Zhang , Peng Liu , Xiaodong Xu , Jun Xu , Kheirreddine Lebbou

{"title":"Er:YScO3 mixed sesquioxide crystal fibers grown by the LHPG technique and optical characterization","authors":"Zhengyuan Jiang , Jian Liu , Longxin Liu , Jun Zhang , Peng Liu , Xiaodong Xu , Jun Xu , Kheirreddine Lebbou","doi":"10.1016/j.jlumin.2025.121360","DOIUrl":"10.1016/j.jlumin.2025.121360","url":null,"abstract":"<div><div>Erbium-doped YScO3 mixed sesquioxide crystal fibers with doping concentrations of 1 at.%, 4 at.%, and 7 at.% were grown using the laser-heated pedestal growth (LHPG) method. The spectral properties of Er:YScO3 were investigated, revealing an absorption cross-section of 2.05 × 10−21 cm2 at 983 nm with full width at half maximum (FWHM) of 20.7 nm for 7 at.% Er:YScO3 crystal fiber. The Judd-Ofelt parameters (Ω2 = 1.50 × 10−20 cm2, Ω4 = 0.66 × 10−20 cm2, Ω6 = 0.96 × 10−20 cm2) were derived, and the emission cross-section at 2729 nm was calculated to be 0.53 × 10−20 cm2 with FWHM of 65.0 nm. The fluorescence lifetimes of the 4I11/2 and 4I13/2 levels were analyzed across doping concentration. The results demonstrate the potential of Er:YScO3 crystal fibers as a promising gain medium for ∼2.7 μm laser applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121360"},"PeriodicalIF":3.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271580","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

Enhanced broadband near-infrared luminescence in Cr3+-activated Gd2Ga1-2xZnxSixSbO7 phosphors for multifunctional applications Cr3+激活Gd2Ga1-2xZnxSixSbO7荧光粉的增强宽带近红外发光功能

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-08 DOI: 10.1016/j.jlumin.2025.121356

Siyu Guo , Chao Tang , Ligan Ma , Rongfei Wei , Xiangling Tian , Fangfang Hu , Hai Guo

{"title":"Enhanced broadband near-infrared luminescence in Cr3+-activated Gd2Ga1-2xZnxSixSbO7 phosphors for multifunctional applications","authors":"Siyu Guo , Chao Tang , Ligan Ma , Rongfei Wei , Xiangling Tian , Fangfang Hu , Hai Guo","doi":"10.1016/j.jlumin.2025.121356","DOIUrl":"10.1016/j.jlumin.2025.121356","url":null,"abstract":"<div><div>The rapid advancement of near-infrared (NIR) spectroscopy has spurred a significant demand for innovative broadband NIR phosphors. Here, a [Zn2+-Si4+] → [Ga3+-Ga3+] co-substitution strategy is designed to modify the local symmetry and crystal field environment of Cr3+ in Gd2GaSbO7. Consequently, the luminescence experiences notable enhancement, broadening, and red-shifting under an irradiation of 460 nm light. The Gd2Ga0.91Zn0.02Si0.02SbO7:5%Cr3+ phosphor demonstrates a broadband emission centered at 797 nm with a full-width at half maximum of 126 nm. Moreover, the NIR emission intensity retains 50.96% of the ambient value at 423 K. Ultimately, the as-obtained phosphor was successfully encapsulated into a blue chip to manufacture a NIR phosphor-converted light-emitting diode (pc-LED) with an NIR output power of 47.83 mW and a photoelectric efficiency of 10.70%. These results underscore the potential of Gd2Ga1-2xZnxSixSbO7:Cr3+ as a high-performance material for advanced NIR spectroscopy applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121356"},"PeriodicalIF":3.3,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254397","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

Highly transparent polymethylsilsesquioxane xerogel monoliths with nanopores around 10 nm via ambient pressure drying: A potential host for nano-functional materials 通过环境压力干燥具有10纳米左右纳米孔的高透明聚甲基硅氧烷干凝胶单体：纳米功能材料的潜在宿主

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-07 DOI: 10.1016/j.jlumin.2025.121353

Chen Chang , Shixu Tao , Chang Xu , Yu Zhang , Wenxin Jiang , Yongge Cao , Chaoyang Ma

{"title":"Highly transparent polymethylsilsesquioxane xerogel monoliths with nanopores around 10 nm via ambient pressure drying: A potential host for nano-functional materials","authors":"Chen Chang , Shixu Tao , Chang Xu , Yu Zhang , Wenxin Jiang , Yongge Cao , Chaoyang Ma","doi":"10.1016/j.jlumin.2025.121353","DOIUrl":"10.1016/j.jlumin.2025.121353","url":null,"abstract":"<div><div>Silica aerogels are ideal templates for nanomaterial encapsulation due to high porosity and narrow pore size distribution (<10 nm) but suffer from poor mechanical strength. Polymethylsilsesquioxane (PMSQ) aerogels present better strength and transparency, yet their large pore size (10–30 nm) limits nanoparticle embedding. This study employed surface modification using hexamethyldisilazane (HMDZ) combined with ambient pressure drying (APD) to fabricate transparent, crack-free PMSQ xerogel monoliths featuring ∼10 nm nanopores, improved mechanical robustness and enhanced hydrophobicity. The effects of preparation conditions on the microstructure, transmittance, and thermal conductivity of the xerogels were systematically investigated. Furthermore, HMDZ-modified PMSQ xerogel monoliths were effectively utilized as mesoporous hosts for CsPbBr3 quantum dots (QDs). The resulting CsPbBr3 QDs@PMSQ composite monolith combined the high transparency, low density and hydrophobicity of PMSQ xerogels with the strong luminescence of QDs. The composites exhibited a PLQY of 37% along with outstanding moisture stability, photostability, and thermal stability. A white LED fabricated using the CsPbBr3 QDs@PMSQ composite monolith, red K2SiF6: Mn4+ phosphors and a blue GaN chip exhibits bright emission with CIE coordinates of (0.23, 0.24), a luminous efficiency of 100 lm/W and approximately 132% coverage of the NTSC 1931 color gamut with outstanding long-term device stability. These results highlight the potential of HMDZ-modified PMSQ xerogel monoliths as promising mesoporous hosts for nano-functional materials, especially for stabilizing perovskite QDs in optoelectronic applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121353"},"PeriodicalIF":3.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144243337","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

The effect of Y3+ on microstructure and scintillation properties of hot-pressed Eu2+ doped CaF2 transparent ceramics Y3+对热压Eu2+掺杂CaF2透明陶瓷微观结构和闪烁性能的影响

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-07 DOI: 10.1016/j.jlumin.2025.121354

Zhiwei Zhou , Pengshuai Zhang , Guanyu Chen , Dan Yuan , Wentao Jing , Yu Yang , Qianqian Jin , Yuangang Lan , Bingchu Mei

{"title":"The effect of Y3+ on microstructure and scintillation properties of hot-pressed Eu2+ doped CaF2 transparent ceramics","authors":"Zhiwei Zhou , Pengshuai Zhang , Guanyu Chen , Dan Yuan , Wentao Jing , Yu Yang , Qianqian Jin , Yuangang Lan , Bingchu Mei","doi":"10.1016/j.jlumin.2025.121354","DOIUrl":"10.1016/j.jlumin.2025.121354","url":null,"abstract":"<div><div>CaF2:Eu2+ transparent ceramics with and without Y3+ doping were fabricated by the hot-pressed sintering method under the inert atmosphere via the co-precipitation-synthesized nanoparticles. After the co-doping of Y3+, there was no significant change in the particle size of the nanoparticles, but the grain size of the ceramics was markedly reduced. The optical transmission of CaF2: Eu2+, Y3+ ceramics at 425 nm achieved approximately 46.3 %, surpassing that of CaF2:Eu2+ ceramics. With Y3+ ions co-doping, the photoluminescence (PL) and X-ray induced emission spectra displayed stronger emission bands at 422 nm ascribed to 5d-4f transitions of Eu2+ ions and weaker emission peaks at 550–650 nm range originating from 4f-4f transitions of Eu3+ ions in Eu2+:CaF2 ceramic. Furthermore, the effect of co-doped Y3+ ions on the scintillation decay lifetime, pulse height spectra, and thermoluminescence of the samples were investigated.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121354"},"PeriodicalIF":3.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242984","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

Exploring the structural and luminescent properties of Eu3+ activated LaOBr nanophosphors for potential lighting, optical thermometry and forensic applications 探索Eu3+活化的LaOBr纳米荧光粉的结构和发光特性，用于潜在的照明，光学测温和法医应用

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-06-07 DOI: 10.1016/j.jlumin.2025.121349

Ansu Sara Solomon , Kavia J. Albert , S. Masilla Moses Kennedy , Prathibha Vasudevan

{"title":"Exploring the structural and luminescent properties of Eu3+ activated LaOBr nanophosphors for potential lighting, optical thermometry and forensic applications","authors":"Ansu Sara Solomon , Kavia J. Albert , S. Masilla Moses Kennedy , Prathibha Vasudevan","doi":"10.1016/j.jlumin.2025.121349","DOIUrl":"10.1016/j.jlumin.2025.121349","url":null,"abstract":"<div><div>The milestone significance of red-emitting phosphor has channeled the synthesis of high-luminous LaOBr: Eu3+ nanophosphors through a solid-state route. The comprehensive phase purity and crystal structure characterizations are performed using X-ray diffraction (XRD) and Rietveld refinement analysis. The elemental composition, morphology and the incorporation of Eu3+ in LaOBr matrix are substantiated using X-ray photon electron spectroscopy (XPS), TEM, FESEM and EDS techniques. The radiative properties were evaluated using Judd-Ofelt analysis, and the JO parameters follow the trend Ω2 > Ω4. The photoluminescence spectrum exhibits deep red emission at 618 nm and the sample at 5 mol% is determined to be the optimized concentration, through dipole-dipole interaction. The decay lifetime is found to be the order of microseconds and the calorimetric investigation, gives insights about CIE coordinates (0.6304, 0.3692), CCT (1186 K) and LER (182 lm/W) of the optimum concentration. The optimized phosphor exhibited good thermal stability and activation energy is evaluated. The FIR and FWHM modes are utilized to calculate the absolute and relative sensitivities of the optimized phosphor material. Impressively, the scope of these nanophosphors was leveraged to detect latent fingerprints (LFP), lip prints and for the fabrication of flexible luminescent inks with excellent sensitivity and resolution. This study showcases LaOBr: Eu3+ as a versatile luminous platform for applications in WLEDs, optical thermometry, forensic science, flexible displays and anti-counterfeiting.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"286 ","pages":"Article 121349"},"PeriodicalIF":3.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241016","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