Journal of Luminescence最新文献_第3页

Enhanced green and NIR emissions in Yb2Mo4O15:Er3+ via excitation energy confinement for a novel NIR LED with real-time chip temperature monitoring

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-04-04 DOI: 10.1016/j.jlumin.2025.121233

Haibin Zhang , Jiarui Zhao , Ying Ji, Tao Pang

引用次数: 0

Luminous thermal stability and versatile applications of red emitting Ba3Y4O9: Eu3+ phosphor in W-LEDs, forensic science and security technologies

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-04-03 DOI: 10.1016/j.jlumin.2025.121220

C.K. Chaithra , B.R. Radha Krushna , M. Mangala Gowri , S.C. Sharma , Liza Mohapatra , R. Jagan Mohan , Balanehru Subramanian , K. Manjunatha , Sheng Yun Wu , R. Arunakumar , H. Nagabhushana

{"title":"Luminous thermal stability and versatile applications of red emitting Ba3Y4O9: Eu3+ phosphor in W-LEDs, forensic science and security technologies","authors":"C.K. Chaithra , B.R. Radha Krushna , M. Mangala Gowri , S.C. Sharma , Liza Mohapatra , R. Jagan Mohan , Balanehru Subramanian , K. Manjunatha , Sheng Yun Wu , R. Arunakumar , H. Nagabhushana","doi":"10.1016/j.jlumin.2025.121220","DOIUrl":"10.1016/j.jlumin.2025.121220","url":null,"abstract":"<div><div>A red-emitting Ba<sub>3</sub>Y<sub>4</sub>O<sub>9</sub>: Eu<sup>3+</sup> (BYO: Eu<sup>3+</sup>) phosphors are synthesized via cost effective solution combustion method. The phase structure of the synthesized phosphor is analyzed through X-ray diffraction (XRD) with Rietveld refinement, complemented by field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS). Photoluminescence (PL) studies of BYO: 3Eu<sup>3+</sup> revealed strong orange-red emission peaks centered at 586 nm and 614 nm under 392 nm deep ultraviolet excitation. The optimal doping concentration is determined to be 3 mol%, beyond which concentration quenching is observed. The BYO: 3Eu<sup>3+</sup> phosphor exhibited remarkable thermal stability, maintaining 85 % of its luminescence intensity at 420 K, with an activation energy (E<sub>a</sub>) of 0.375 eV. The quantum efficiency is assessed using an integrating sphere, yielding an internal quantum efficiency (I<sub>QE</sub>) of 91.3 %. The fabricated white light emitting diode (w-LED) achieved a correlated color temperature (CCT) of 4952 K, an impressive color rendering index (CRI) of 92, and Commission Internationale de l’Éclairage (CIE) chromaticity coordinates of (0.346, 0.348). Additionally, BYO: 3Eu<sup>3+</sup> demonstrated effective visualization of level I–III LFP structures under ultraviolet illumination, facilitating forensic detection in various real-world applications. These findings underscore the significant potential of BYO: 3Eu<sup>3+</sup> phosphors for w-LEDs lighting, forensic fingerprint analysis, and anticounterfeiting technologies.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"282 ","pages":"Article 121220"},"PeriodicalIF":3.3,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807432","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

Trypan blue dyed TGS crystal: Morphological, optical, thermal, mechanical, and ferroelectric properties

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-04-03 DOI: 10.1016/j.jlumin.2025.121224

Sandeep Kumar , Anupama Saini , Sahil Goel , Subhash Chandra Bola , Mamraj Singh , B.L. Choudhary

{"title":"Trypan blue dyed TGS crystal: Morphological, optical, thermal, mechanical, and ferroelectric properties","authors":"Sandeep Kumar , Anupama Saini , Sahil Goel , Subhash Chandra Bola , Mamraj Singh , B.L. Choudhary","doi":"10.1016/j.jlumin.2025.121224","DOIUrl":"10.1016/j.jlumin.2025.121224","url":null,"abstract":"<div><div>Tri-glycine sulfate (TGS) single crystals were synthesized using the slow evaporation method, with samples prepared both undoped and doped with 0.1 mol% trypan blue (TB) dye. The external morphology of the crystals, both doped and undoped, was analyzed using the Bravais–Friedel–Donnay–Harker (B–F–D–H) model. Structural characteristics were examined through Fourier Transform Infrared (FTIR) spectroscopy and powder X-ray diffraction (XRD). UV–Vis–NIR spectral analysis revealed an optical transparency of approximately 65 % for both crystal types, with band gap energies of 5.20 eV for undoped TGS and 5.02 eV for TB-doped TGS. The inclusion of TB dye enhanced the mechanical hardness, thermal stability, and melting point of the TGS crystals. Piezoelectric studies showed a significant increase in the piezoelectric coefficient (d<sub>22</sub>) from 53 pC/N in undoped TGS to 82 pC/N in TB-doped TGS. Precise remnant polarization was calculated for the doped crystal using the “Remnant Hysteresis Task,” highlighting minimal contributions from non-switchable factors. Comparative investigations of thermal, ferroelectric, optical, and mechanical properties demonstrate that TB-dyed TGS crystals outperform their undoped counterparts, suggesting their potential for advanced ferroelectric and electro-optic applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"282 ","pages":"Article 121224"},"PeriodicalIF":3.3,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825911","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

Photophysical properties of Eu3+ in functionalized room-temperature ionic liquids: 1-Butyl-3-Methylimidazolium o-toluate and 1-Butyl-3-Methylimidazolium m-toluate: A fluorescence enhancement study

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-04-03 DOI: 10.1016/j.jlumin.2025.121223

V. Shyamala Devi

{"title":"Photophysical properties of Eu3+ in functionalized room-temperature ionic liquids: 1-Butyl-3-Methylimidazolium o-toluate and 1-Butyl-3-Methylimidazolium m-toluate: A fluorescence enhancement study","authors":"V. Shyamala Devi","doi":"10.1016/j.jlumin.2025.121223","DOIUrl":"10.1016/j.jlumin.2025.121223","url":null,"abstract":"<div><div>This study investigates the fluorescence enhancement of Eu<sup>3+</sup> ions incorporated into two new room-temperature ionic liquids (RTILs), namely 1-Butyl-3-Methylimidazolium <em>o</em>-Toluate and 1-Butyl-3-Methylimidazolium <em>m</em>-Toluate. The fluorescence properties of Eu<sup>3+</sup>, such as emission intensities and lifetimes, were assessed in the presence of these ionic liquids. The enhancement effects are attributed to the ligand sensitization process of Eu<sup>3+</sup> using RTILs, including their non-quenching environment, which influence the solvation environment and the emission properties of Eu<sup>3+</sup>. The findings offer insights into the potential application of these RTILs in the nanomolar level detection of Eu<sup>3+</sup> in ionic liquids. The observed lifetime of Eu<sup>3+</sup> in toluate-based ionic liquids exhibits a significant enhancement compared to its counterpart in aqueous solution, highlighting the potential of these media for improved luminescence performance in sensing applications.</div><div>In this study, we report the synthesis and characterization of newly designed ionic liquids. The synthesis method is detailed, ensuring reproducibility and efficiency. Comprehensive characterization was performed using infrared (IR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, and mass spectrometry to confirm the structural integrity and purity of the synthesized compounds.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"282 ","pages":"Article 121223"},"PeriodicalIF":3.3,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786298","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

Radiation dose dependence of the Bi3+ luminescence in YPO4 YPO4 中 Bi3+ 发光的辐射剂量依赖性

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-04-03 DOI: 10.1016/j.jlumin.2025.121222

Y.A. Kuznetsova , I.N. Ogorodnikov , D.V. Raikov , S.A. Kiselev , V.S. Voynov , M.A. Mashkovtsev , D.V. Khionin , A.V. Chukin , E.K. Gorodnichiy

{"title":"Radiation dose dependence of the Bi3+ luminescence in YPO4","authors":"Y.A. Kuznetsova , I.N. Ogorodnikov , D.V. Raikov , S.A. Kiselev , V.S. Voynov , M.A. Mashkovtsev , D.V. Khionin , A.V. Chukin , E.K. Gorodnichiy","doi":"10.1016/j.jlumin.2025.121222","DOIUrl":"10.1016/j.jlumin.2025.121222","url":null,"abstract":"<div><div>The UV persistent phosphors YPO<sub>4</sub>:Bi were synthesized using both solid-state reaction and hydrothermal methods. XRD and SEM analyses confirmed the formation of single-phase powders. The solid-state synthesis resulted in ‘large’ particle sizes (1–4 μm), while the hydrothermal synthesis produced ‘small’ particle sizes (30–45 nm). The emission centers providing UV-C and UV-A luminescence under X-ray excitation are single Bi<sup>3+</sup> ion and Bi<sup>3+</sup>– Bi<sup>3+</sup> pairs. The highest emission yield was observed for samples with a Bi<sup>3+</sup> concentration of 0.6 mol.%. An analysis of thermoluminescence glow curves using the general order kinetics model, revealed hole traps with an activation energy of 0.93–1.05 eV and electron traps with an activation energy of 0.75–0.85 eV. The dominant mechanisms for UV-C and UV-A emission involve hole recombination at Bi<sup>2+</sup> ions and electron recombination at Bi3+– Bi<sup>4+</sup> pairs, respectively. The optimal X-ray irradiation dose is 10–12 Gy. The UV-C and UV-A afterglow curves at room temperature follow the sum of exponential and first-order hyperbola functions, corresponding to electron recombination through the conduction band and hole recombination via tunneling, respectively. The afterglow durations for the solid-state prepared powder are 40 min for UV-A and 10 min for UV-C. The powder synthesized by hydrothermal method shows a significant reduction in intensity of afterglow due to the surface energy losses. Notably, despite the decreased intensity, there is a significant increase in the duration of the tunneling component responsible for UV-C emission, attributed to the reduced average distance between the emission center and the hole trap. Methods for improving the afterglow characteristics of YPO<sub>4</sub>:Bi nanoparticles are proposed.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"282 ","pages":"Article 121222"},"PeriodicalIF":3.3,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786299","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

Visible and infrared up-conversion emission in Er3+-doped fluorochlorozirconate glasses under 1550 nm and 980 nm excitations

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-04-01 DOI: 10.1016/j.jlumin.2025.121219

Cyril Koughia, Safa Kasap

{"title":"Visible and infrared up-conversion emission in Er3+-doped fluorochlorozirconate glasses under 1550 nm and 980 nm excitations","authors":"Cyril Koughia, Safa Kasap","doi":"10.1016/j.jlumin.2025.121219","DOIUrl":"10.1016/j.jlumin.2025.121219","url":null,"abstract":"<div><div>Upconversion (UC) and photoluminescence (PL) measurements were carried out on trivalent erbium (Er<sup>3+</sup>) doped fluorochlorozirconate (FCZ) glasses. The experiments show that neither PL spectra nor PL relaxation times depend on Er<sup>3+</sup> concentration up to 2 at.%, indicating the absence of clusterization and collective effects. Radiation diffusion was also excluded based on the PL decay lifetime being experimentally the same in powder and bulk samples. Additionally, FCZ:Er<sup>3+</sup> shows an efficient up-conversion in visible and IR regions under 1550 nm or 980 nm pumping. The intensity of up-converted PL bands versus pumping intensity (<em>G</em>) behavior follows PL ∝ <em>G</em><sup><em>n</em></sup> with <em>n</em> varying from 1 to 3 depending on the PL band and pump wavelength and intensity. The observed dependences and variation of <em>n</em> may be interpreted by a model of linear rate equations for seven lower manifolds, approximated by six monolevels. The validity of this approximation is supported by the application of the McCumber theory to the shapes of PL and optical absorption spectra. The present model for the experimental data was also supplemented by using Judd-Ofelt parameters obtained from the absorption spectra on the same set of glasses. It should be emphasized that the model developed in this work provides a self-consistent interpretation of the upconversion experiments at 1550 and 980 nm pumping reported herein.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"282 ","pages":"Article 121219"},"PeriodicalIF":3.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792290","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

Regulating broadband near-infrared luminescence and thermal stability of Cs2AgBiCl6 double perovskite via alkali metal ions doping

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-04-01 DOI: 10.1016/j.jlumin.2025.121221

Jingjing Liu , Jianwu Wei , Peican Chen , Binbin Luo , Liya Zhou , Jie Tian , Jiahong Pan , Alexei V. Emeline , Qi Pang

{"title":"Regulating broadband near-infrared luminescence and thermal stability of Cs2AgBiCl6 double perovskite via alkali metal ions doping","authors":"Jingjing Liu , Jianwu Wei , Peican Chen , Binbin Luo , Liya Zhou , Jie Tian , Jiahong Pan , Alexei V. Emeline , Qi Pang","doi":"10.1016/j.jlumin.2025.121221","DOIUrl":"10.1016/j.jlumin.2025.121221","url":null,"abstract":"<div><div>Lead-free double perovskites have attracted much attention for their unique optical properties, though achieving efficient broadband near-infrared (NIR) emission with them remains a challenge. In this work, we successfully synthesized a new microcrystalline structure of lead-free double perovskites Cs<sub>2</sub>Ag<sub>1-x</sub>R<sub>x</sub>BiCl<sub>6</sub> (R = Na, K, Rb) using a simple chemical reflux method, achieving NIR emission. Notably, Cs<sub>2</sub>Ag<sub>0.7</sub>K<sub>0.3</sub>BiCl<sub>6</sub> demonstrates a broad emission spectrum spanning from 500 to 1200 nm with a significant half-peak width of 300 nm under 365 nm excitation. This is attributed to the doping of alkali metal ions can break the inherent parity-forbidden transition and induce strong exciton-phonon coupling through lattice distortion. Temperature-dependent photoluminescence spectroscopy and density functional theory calculations analysis reveal that alkali metal ions can enhance the thermal stability of self-trapped exciton emission by reducing exciton-phonon coupling strength. Finally, we demonstrate the promising applications of Cs<sub>2</sub>Ag<sub>0.7</sub>K<sub>0.3</sub>BiCl<sub>6</sub> crystals with broad emission bands for NIR night vision and information encryption. This provides new insights into the realization of near-infrared emission and thermal stability regulation.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"282 ","pages":"Article 121221"},"PeriodicalIF":3.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783222","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 red upconversion luminescence in Fe3+-activated NaYF4: Yb, Er nanocrystals for rapid latent fingerprint recognition

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-03-29 DOI: 10.1016/j.jlumin.2025.121218

Guangliang Lu, Yiping Zhang, Jianlian Song, Yuhan Jing, Xingyu Li, Rao Qin, Da Biao Zhai, Jiangang Jiang, Yiping Wang, He Wang

{"title":"Enhanced red upconversion luminescence in Fe3+-activated NaYF4: Yb, Er nanocrystals for rapid latent fingerprint recognition","authors":"Guangliang Lu, Yiping Zhang, Jianlian Song, Yuhan Jing, Xingyu Li, Rao Qin, Da Biao Zhai, Jiangang Jiang, Yiping Wang, He Wang","doi":"10.1016/j.jlumin.2025.121218","DOIUrl":"10.1016/j.jlumin.2025.121218","url":null,"abstract":"<div><div>Traditional methods for latent fingerprint (LFP) detection often suffer from insufficient contrast and background interference, limiting their effectiveness in forensic applications, particularly in complex environments. This study introduces an innovative approach that combines Fe<sup>3+</sup>-doped NaYF<sub>4</sub>:Yb, Er upconversion nanoparticles (UCNPs) with digital image processing technology. By optimizing the Fe<sup>3+</sup> doping concentration (15 % mmol) and synthesis temperature (220 °C), the red emission intensity at 655 nm was enhanced by 13.96 times compared to undoped samples. The amplified red emission originates from energy transfer of |<sup>2</sup>F<sub>7/2</sub>, <sup>4</sup>T<sub>1g</sub>⟩ (Yb<sup>3+</sup>-Fe<sup>3+</sup> dimer) to <sup>4</sup>F<sub>9/2</sub> (Er<sup>3+</sup>) states, coupled with crystalline field symmetry distortion induced by Fe<sup>3+</sup> codoping. Dynamic studies of <sup>4</sup>S<sub>3/2</sub> and <sup>4</sup>F<sub>9/2</sub> states under 980 nm pulsed laser excitation, alongside diffuse reflectance analysis, corroborate the proposed upconversion mechanism. Additionally, The optimized UCNPs demonstrated high biocompatibility and stability, achieving LFP visualization with contrast ratios up to 85.03 % and structural similarity scores exceeding 91.58 % via MATLAB-based digital image processing, a significant improvement over conventional methods. This work establishes a robust, non-toxic LFP detection system with potential applications in forensic science.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"282 ","pages":"Article 121218"},"PeriodicalIF":3.3,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747365","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

A novel red-emission Ca2LaTiAl3O12:Eu3+ phosphor with garnet structure and high stability for high-CRI white light-emitting devices

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-03-29 DOI: 10.1016/j.jlumin.2025.121217

Weihao Ye , Mi Li , Shaowei Li , Jie Luo , Yingji He , Yang Lv , Xiaotang Liu , Yingliang Liu , Guangqi Hu

引用次数: 0

Microwave-assisted synthesis of up-converting Yb3+/Eu3+ co-doped yttrium oxyfluoride micro/nano particles for white light emission

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2025-03-28 DOI: 10.1016/j.jlumin.2025.121216

Liqin Xiang , Keyun Li , Yunxiao Li , Chaoshun Yang , Adnan Ahmed , Xiaopeng Zhao , Wei Gao

引用次数: 0