Pub Date : 2024-09-26DOI: 10.1016/j.jlumin.2024.120915
In order to study the spectral properties of Ho3+:YLiF4 (Ho3+:YLF), we measured the absorption spectra f Ho3+:YLF crystal. The experimental and calculated electric dipole line strength are calculated based on Judd-Ofelt theory, so do other spectral parameters. In order to characterize the emission characteristics of energy level, we measured the emission spectra of Ho3+:YLF crystal under the pumping of lasers at 450 nm and 640 nm, and the partial emission cross-sections spectra was calculated according to the Fuchtbauer-Ladenburg theory. Moreover, the fluorescence lifetimes of 537 nm, 656 nm, 750 nm, 1195 nm and 1964 nm are measured. As far as we know, the fluorescence lifetime of 1964 nm (∼2 μm) and the emission cross-sections of ∼750 nm and ∼961 nm are confirmed for the first time. This work lays the foundation for the generation of lasing at novel wavelength on Ho3+:YLF crystal.
{"title":"Spectral analysis and emission properties of Ho3+: YLF in the visible-near infrared band","authors":"","doi":"10.1016/j.jlumin.2024.120915","DOIUrl":"10.1016/j.jlumin.2024.120915","url":null,"abstract":"<div><div>In order to study the spectral properties of Ho<sup>3+</sup>:YLiF<sub>4</sub> (Ho<sup>3+</sup>:YLF), we measured the absorption spectra f Ho<sup>3+</sup>:YLF crystal. The experimental and calculated electric dipole line strength are calculated based on Judd-Ofelt theory, so do other spectral parameters. In order to characterize the emission characteristics of energy level, we measured the emission spectra of Ho<sup>3+</sup>:YLF crystal under the pumping of lasers at 450 nm and 640 nm, and the partial emission cross-sections spectra was calculated according to the Fuchtbauer-Ladenburg theory. Moreover, the fluorescence lifetimes of 537 nm, 656 nm, 750 nm, 1195 nm and 1964 nm are measured. As far as we know, the fluorescence lifetime of 1964 nm (∼2 μm) and the emission cross-sections of ∼750 nm and ∼961 nm are confirmed for the first time. This work lays the foundation for the generation of lasing at novel wavelength on Ho<sup>3+</sup>:YLF crystal.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327869","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}
Pub Date : 2024-09-26DOI: 10.1016/j.jlumin.2024.120917
Novel functional materials that integrate multiple tunable luminescence modes hold significant scientific and application potential. In this study, nanostructure strategies were employed to fabricate a series of microcrystalline glasses doped with rare-earth and transition-metal ions. The crystallization behavior of the nanocrystals (NCs) was revealed through high-resolution transmission electron microscopy (HRTEM), and the photoluminescence spectra of the samples were systematically investigated, demonstrating the achievement of independent and efficient visible light emission. With the further addition of the dopant Mn2+, it can occupy different sites to generate efficient energy transfer for ions, effectively improve the luminous efficiency, and changing the Mn2+ concentration can achieve a wide tunable color gamut. In addition, by exciting the glass samples with different excitation light sources, tunable emission of both red and blue was achieved. The results demonstrated the significant potential of the experimental samples as new multifunctional materials for optical dynamic anti-counterfeiting applications.
{"title":"Controllable multicolored optical glass-ceramics based on nanostructure strategies and dopants","authors":"","doi":"10.1016/j.jlumin.2024.120917","DOIUrl":"10.1016/j.jlumin.2024.120917","url":null,"abstract":"<div><div>Novel functional materials that integrate multiple tunable luminescence modes hold significant scientific and application potential. In this study, nanostructure strategies were employed to fabricate a series of microcrystalline glasses doped with rare-earth and transition-metal ions. The crystallization behavior of the nanocrystals (NCs) was revealed through high-resolution transmission electron microscopy (HRTEM), and the photoluminescence spectra of the samples were systematically investigated, demonstrating the achievement of independent and efficient visible light emission. With the further addition of the dopant Mn<sup>2+</sup>, it can occupy different sites to generate efficient energy transfer for ions, effectively improve the luminous efficiency, and changing the Mn<sup>2+</sup> concentration can achieve a wide tunable color gamut. In addition, by exciting the glass samples with different excitation light sources, tunable emission of both red and blue was achieved. The results demonstrated the significant potential of the experimental samples as new multifunctional materials for optical dynamic anti-counterfeiting applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327866","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}
Pub Date : 2024-09-24DOI: 10.1016/j.jlumin.2024.120912
Gold nanoclusters suspension were effectively synthesized under alkaline conditions in a chemical reduction process involving gold(III) chloride trihydrate and lysozyme (LYZ) molecules. Their size determined by high-resolution transmission electron microscopy (HR-TEM) was equal to 1.9 ± 0.5 nm. The nanoclusters, referred to as LYZ-Au NCs, were stable at pH below 4 and above 8, exhibiting a hydrodynamic diameter between 8 and 11 nm. The isoelectric point of LYZ-Au NCs appeared at pH 5.0. The suspension showed a pronounced fluorescence characterized by the red-emitting band at 668 nm. The deposition kinetics and stability of LYZ-Au NCs on bare and poly(diallyldimethylammonium chloride) (PDADMAC)-modified silica sensors were studied using quartz crystal microbalance (QCM). The influence of ionic strength, pH, and suspension concentration on the kinetics of LYZ-Au NCs deposition was determined. The significant increase in the maximum coverage of LYZ-Au NCs with ionic strength was attributed to the decreasing range of electrostatic interactions between deposited clusters. Atomic force microscopy (AFM) confirmed the formation of homogeneous layers of LYZ-Au NCs with controlled coverage on bare silica at pH 3.5 and PDADMAC-modified silica. It was shown by confocal microscopy investigations, that these layers also exhibited pronounced fluorescent properties.
{"title":"Fluorescent gold nanoclusters stabilized by lysozyme: Synthesis and deposition kinetics on silica substrates","authors":"","doi":"10.1016/j.jlumin.2024.120912","DOIUrl":"10.1016/j.jlumin.2024.120912","url":null,"abstract":"<div><div>Gold nanoclusters suspension were effectively synthesized under alkaline conditions in a chemical reduction process involving gold(III) chloride trihydrate and lysozyme (LYZ) molecules. Their size determined by high-resolution transmission electron microscopy (HR-TEM) was equal to 1.9 ± 0.5 nm. The nanoclusters, referred to as LYZ-Au NCs, were stable at pH below 4 and above 8, exhibiting a hydrodynamic diameter between 8 and 11 nm. The isoelectric point of LYZ-Au NCs appeared at pH 5.0. The suspension showed a pronounced fluorescence characterized by the red-emitting band at 668 nm. The deposition kinetics and stability of LYZ-Au NCs on bare and poly(diallyldimethylammonium chloride) (PDADMAC)-modified silica sensors were studied using quartz crystal microbalance (QCM). The influence of ionic strength, pH, and suspension concentration on the kinetics of LYZ-Au NCs deposition was determined. The significant increase in the maximum coverage of LYZ-Au NCs with ionic strength was attributed to the decreasing range of electrostatic interactions between deposited clusters. Atomic force microscopy (AFM) confirmed the formation of homogeneous layers of LYZ-Au NCs with controlled coverage on bare silica at pH 3.5 and PDADMAC-modified silica. It was shown by confocal microscopy investigations, that these layers also exhibited pronounced fluorescent properties.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327867","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}
Pub Date : 2024-09-24DOI: 10.1016/j.jlumin.2024.120907
Room-temperature phosphorescence (RTP) materials have shown widespread applications in optoelectronic devices, biological imaging, molecular switches, safety systems, etc. Here, we report the design and synthesis of a series of metal‒organic halide materials with regulated phosphorescence and fluorescence dual emission properties. Their dual emission ratio and RTP lifetime can be facilely tuned by the halide substituent synthesis. Bright afterglow with various emission duration for the investigated materials can be identified by the naked eyes. DFT calculations reveal that the excited states exhibit halide‒ligand charge transfer (XLCT) character and the halide atoms play crucial role in their luminescence properties. Based on their regulatable dual emission and afterglow properties, a time-resolved anti-counterfeiting application is developed and avoids the over-dependence on equipment, which further provides feasible design strategy of advanced portable anti-counterfeiting technology.
{"title":"Halide modulated room-temperature phosphorescence from one-dimensional metal‒organic halides for time-resolved anti-counterfeiting","authors":"","doi":"10.1016/j.jlumin.2024.120907","DOIUrl":"10.1016/j.jlumin.2024.120907","url":null,"abstract":"<div><div>Room-temperature phosphorescence (RTP) materials have shown widespread applications in optoelectronic devices, biological imaging, molecular switches, safety systems, etc. Here, we report the design and synthesis of a series of metal‒organic halide materials with regulated phosphorescence and fluorescence dual emission properties. Their dual emission ratio and RTP lifetime can be facilely tuned by the halide substituent synthesis. Bright afterglow with various emission duration for the investigated materials can be identified by the naked eyes. DFT calculations reveal that the excited states exhibit halide‒ligand charge transfer (XLCT) character and the halide atoms play crucial role in their luminescence properties. Based on their regulatable dual emission and afterglow properties, a time-resolved anti-counterfeiting application is developed and avoids the over-dependence on equipment, which further provides feasible design strategy of advanced portable anti-counterfeiting technology.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314575","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}
Pub Date : 2024-09-23DOI: 10.1016/j.jlumin.2024.120906
Luminescent metal halide quantum dots (QDs), particularly perovskite quantum dots (PQDs), garnered remarkable attention for unique optical properties as well as critical use for advanced photonic and electronic devices. This comprehensive review explores the synthesis, properties, and applications of PQDs, with a focus on their role in luminescent metal halide QD devices. The review begins by discussing advanced synthesis techniques and surface engineering strategies for PQDs, highlighting recent developments in the field. Structural and optical characterization techniques are then examined, emphasizing the importance of understanding quantum confinement effects and emission mechanisms in PQDs. The review also includes a discussion on modelling and simulation, discussing computational methods for predicting and optimizing PQD properties. Experimental studies and device fabrication techniques are discussed in detail, showcasing the progress made in integrating PQDs into optoelectronic devices. Advanced applications of PQDs in light-emitting devices, solar cells, sensors, and photodetectors are explored, highlighting their potential for efficiency enhancements and novel functionalities. A detailed discussion on the emerging role of machine learning (ML) in PQD research, focusing on its applications in materials discovery and device optimization are also included. This review explores the potential of luminescent PQDs for quantum computing applications, focusing on their role as qubits, quantum gates, and quantum memory devices, emphasizing the latest advancements, challenges, and future prospects of integrating PQDs into quantum computing architectures. The review concludes with an overview of emerging trends and future directions in the field, emphasizing the need for continued research to unlock the full potential of PQDs in advanced photonic and electronic devices.
{"title":"Luminescent perovskite quantum dots: Progress in fabrication, modelling and machine learning approaches for advanced photonic and quantum computing applications","authors":"","doi":"10.1016/j.jlumin.2024.120906","DOIUrl":"10.1016/j.jlumin.2024.120906","url":null,"abstract":"<div><div>Luminescent metal halide quantum dots (QDs), particularly perovskite quantum dots (PQDs), garnered remarkable attention for unique optical properties as well as critical use for advanced photonic and electronic devices. This comprehensive review explores the synthesis, properties, and applications of PQDs, with a focus on their role in luminescent metal halide QD devices. The review begins by discussing advanced synthesis techniques and surface engineering strategies for PQDs, highlighting recent developments in the field. Structural and optical characterization techniques are then examined, emphasizing the importance of understanding quantum confinement effects and emission mechanisms in PQDs. The review also includes a discussion on modelling and simulation, discussing computational methods for predicting and optimizing PQD properties. Experimental studies and device fabrication techniques are discussed in detail, showcasing the progress made in integrating PQDs into optoelectronic devices. Advanced applications of PQDs in light-emitting devices, solar cells, sensors, and photodetectors are explored, highlighting their potential for efficiency enhancements and novel functionalities. A detailed discussion on the emerging role of machine learning (ML) in PQD research, focusing on its applications in materials discovery and device optimization are also included. This review explores the potential of luminescent PQDs for quantum computing applications, focusing on their role as qubits, quantum gates, and quantum memory devices, emphasizing the latest advancements, challenges, and future prospects of integrating PQDs into quantum computing architectures. The review concludes with an overview of emerging trends and future directions in the field, emphasizing the need for continued research to unlock the full potential of PQDs in advanced photonic and electronic devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314453","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}
Pub Date : 2024-09-23DOI: 10.1016/j.jlumin.2024.120909
Lead-free double perovskites (LFDPs) usually exhibit poor luminescent performance, and doping lanthanide ions (Ln3+) presents a promising solution to solve this problem. However, most Ln3+ ions face difficulties in incorporating into LFDPs due to the mismatch in radius or valence state. Here, we successfully synthesized rare-earth (RE3+) based Cs2NaLuCl6 (CNLC) LFDPs and achieved efficient green emission through doping Tb3+ into CNLC. Introducing Sb3+ improves the absorption efficiency of CNLC: Tb3+ from 25.1 % to 73.5 % by establishing an energy transfer channel from Sb3+ to Tb3+. Benefiting from the energy transfer, the CNLC: 0.01Sb3+, 0.10Tb3+ phosphor produces blue-green dual emissions, highlighting its potential in white light-emitting diodes (WLEDs). In addition, an anti-counterfeiting pattern composed of CNLC: Sb3+, CNLC: Tb3+, and CNLC: Sb3+, Tb3+ samples was fabricated, which shows their promising prospect in anti-counterfeiting applications.
{"title":"Dual-color emitting in rare-earth based double perovskites Cs2NaLuCl6: Sb3+, Tb3+ for warm WLED and anti-counterfeiting","authors":"","doi":"10.1016/j.jlumin.2024.120909","DOIUrl":"10.1016/j.jlumin.2024.120909","url":null,"abstract":"<div><div>Lead-free double perovskites (LFDPs) usually exhibit poor luminescent performance, and doping lanthanide ions (Ln<sup>3+</sup>) presents a promising solution to solve this problem. However, most Ln<sup>3+</sup> ions face difficulties in incorporating into LFDPs due to the mismatch in radius or valence state. Here, we successfully synthesized rare-earth (RE<sup>3+</sup>) based Cs<sub>2</sub>NaLuCl<sub>6</sub> (CNLC) LFDPs and achieved efficient green emission through doping Tb<sup>3+</sup> into CNLC. Introducing Sb<sup>3+</sup> improves the absorption efficiency of CNLC: Tb<sup>3+</sup> from 25.1 % to 73.5 % by establishing an energy transfer channel from Sb<sup>3+</sup> to Tb<sup>3+</sup>. Benefiting from the energy transfer, the CNLC: 0.01Sb<sup>3+</sup>, 0.10Tb<sup>3+</sup> phosphor produces blue-green dual emissions, highlighting its potential in white light-emitting diodes (WLEDs). In addition, an anti-counterfeiting pattern composed of CNLC: Sb<sup>3+</sup>, CNLC: Tb<sup>3+</sup>, and CNLC: Sb<sup>3+</sup>, Tb<sup>3+</sup> samples was fabricated, which shows their promising prospect in anti-counterfeiting applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314457","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}
Pub Date : 2024-09-23DOI: 10.1016/j.jlumin.2024.120901
This study explores the synthesis, structure, morphology, and photoluminescence features of trivalent RE3+-activated NaCaPO4 phosphors, aiming to develop phosphor materials for white-light-emitting diode (WLED) applications. Single-phase polycrystalline NaCa(1-x) REx3+ PO4 (REx3+ = Sm, Eu, Dy, and Tb) phosphor materials with various REx3+-doping percentiles were produced by a solid-state reaction process, which were analyzed using various characterization techniques. The FullProf Suite software program was used for phase evidence and crystalline structure analysis, confirming the composition of orthorhombic materials as a single phase. FE-SEM micrographs revealed asymmetrically stacked morphologies across all the compositions. This study reveals that trivalent RE3+-activated phosphors produced exceptional PL outcomes. Dexter's and Blasse's approaches were used to establish the interaction mechanisms and critical energy transfer ranges as dipole-dipole. Lifetime decay patterns were used to fit a bi-exponential function and the resulting values were approximated in milliseconds. This study reveals that trivalent RE3+-activated NaCaPO4 phosphors, with their thermal resilience and color integrity, have potential applications in solid-state lighting (SSL) technology.
{"title":"Comparative investigation of structural, morphological and temperature-dependent photoluminescence characteristics of trivalent rare-earth-activated NaCaPO4 phosphors for solid-state lighting applications","authors":"","doi":"10.1016/j.jlumin.2024.120901","DOIUrl":"10.1016/j.jlumin.2024.120901","url":null,"abstract":"<div><div>This study explores the synthesis, structure, morphology, and photoluminescence features of trivalent RE<sup>3+</sup>-activated NaCaPO<sub>4</sub> phosphors, aiming to develop phosphor materials for white-light-emitting diode (WLED) applications. Single-phase polycrystalline NaCa<sub>(1-x)</sub> RE<sub>x</sub><sup>3+</sup> PO<sub>4</sub> (RE<sub>x</sub><sup>3+</sup> = Sm, Eu, Dy, and Tb) phosphor materials with various RE<sub>x</sub><sup>3+</sup>-doping percentiles were produced by a solid-state reaction process, which were analyzed using various characterization techniques. The FullProf Suite software program was used for phase evidence and crystalline structure analysis, confirming the composition of orthorhombic materials as a single phase. FE-SEM micrographs revealed asymmetrically stacked morphologies across all the compositions. This study reveals that trivalent RE<sup>3+</sup>-activated phosphors produced exceptional PL outcomes. Dexter's and Blasse's approaches were used to establish the interaction mechanisms and critical energy transfer ranges as dipole-dipole. Lifetime decay patterns were used to fit a bi-exponential function and the resulting values were approximated in milliseconds. This study reveals that trivalent RE<sup>3+</sup>-activated NaCaPO<sub>4</sub> phosphors, with their thermal resilience and color integrity, have potential applications in solid-state lighting (SSL) technology.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327868","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}
Pub Date : 2024-09-22DOI: 10.1016/j.jlumin.2024.120908
Double halide perovskites have shown admirable potential in promising optoelectronic applications due to simple synthesis, good stability and high structural tolerance. However, the poor optical properties caused by the parity-forbidden transitions posts a stringent limitation on their potential applications. Herein, we dope the lanthanide (Ln3+) ions with abundant energy levels into the Cs2NaInCl6:Sb3+ single crystals, which not only achieve multicolor visible emissions spectra from blue to red light, but also expand to the near infrared region from 800 to 1900 nm. In addition, the phosphors enable the multimode emissions with the up-conversion and down-conversion photoluminescence. Intriguingly, the excitation source, and the excitation light intensity also endow the multicolor emissions. Thus, combining with the multicolor and multimode luminescent properties, Cs2NaInCl6:Sb3+/Ln3+ could be applied to night vision imaging, substance detection, optical thermometry, white-light-emitting diodes (WLEDs) and anti-counterfeiting. The maximum value of relative temperature sensitivity reaches as high as 1.207 % K−1, which is relatively higher than those of most metal halide perovskites. Moreover, the single-source WLED displays Commission Internationale de L'Eclairage color coordinates (0.32, 0.31), a correlated color temperature of 6673 K, and color rendering index of 81.7. These results demonstrate the potential applications in the multifunctional photoelectric applications.
{"title":"Multicolor and multimode luminescent lanthanide-doped Cs2NaInCl6:Sb3+ from visible to near infrared for versatile applications","authors":"","doi":"10.1016/j.jlumin.2024.120908","DOIUrl":"10.1016/j.jlumin.2024.120908","url":null,"abstract":"<div><div>Double halide perovskites have shown admirable potential in promising optoelectronic applications due to simple synthesis, good stability and high structural tolerance. However, the poor optical properties caused by the parity-forbidden transitions posts a stringent limitation on their potential applications. Herein, we dope the lanthanide (Ln<sup>3+</sup>) ions with abundant energy levels into the Cs<sub>2</sub>NaInCl<sub>6</sub>:Sb<sup>3+</sup> single crystals, which not only achieve multicolor visible emissions spectra from blue to red light, but also expand to the near infrared region from 800 to 1900 nm. In addition, the phosphors enable the multimode emissions with the up-conversion and down-conversion photoluminescence. Intriguingly, the excitation source, and the excitation light intensity also endow the multicolor emissions. Thus, combining with the multicolor and multimode luminescent properties, Cs<sub>2</sub>NaInCl<sub>6</sub>:Sb<sup>3+</sup>/Ln<sup>3+</sup> could be applied to night vision imaging, substance detection, optical thermometry, white-light-emitting diodes (WLEDs) and anti-counterfeiting. The maximum value of relative temperature sensitivity reaches as high as 1.207 % K<sup>−1</sup>, which is relatively higher than those of most metal halide perovskites. Moreover, the single-source WLED displays Commission Internationale de L'Eclairage color coordinates (0.32, 0.31), a correlated color temperature of 6673 K, and color rendering index of 81.7. These results demonstrate the potential applications in the multifunctional photoelectric applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312195","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}
Pub Date : 2024-09-21DOI: 10.1016/j.jlumin.2024.120910
Saturable absorbers (SAs) are key devices for passive Q-switching. All-inorganic halide perovskites demonstrate superior stability compared to their organic-inorganic hybrid counterparts, making them more promising candidates as SAs. A high-quality, all-inorganic halide perovskite CsPbBr3, designed for mid-infrared (MIR) broadband saturable absorption, has been successfully fabricated. The saturable absorption properties of this material within the MIR region have been thoroughly characterized. Characterization outcomes reveal that CsPbBr3 possesses outstanding broadband saturable absorption characteristics. For the first time, passive Q-switching operation has been successfully achieved in the MIR region, specifically at wavelengths of 1.9 μm and 2.8 μm, utilizing the CsPbBr3 SA. Peak powers of 5.57 W at the 1.9 μm wavelength and 5.23 W at the 2.8 μm wavelength were achieved. The experimental results indicate that CsPbBr3 is an efficient SA material, holding significant promise for the development of pulsed lasers with broad bandwidth and high energy outputs.
可饱和吸收体（SA）是无源 Q 开关的关键器件。与有机无机杂化的同类产品相比，全无机卤化物包光体具有更高的稳定性，因此更有希望成为可饱和吸收体。目前已成功制备出一种用于中红外（MIR）宽带可饱和吸收的高质量全无机卤化物包晶 CsPbBr3。对这种材料在中红外区域的可饱和吸收特性进行了全面表征。表征结果表明，CsPbBr3 具有出色的宽带可饱和吸收特性。利用 CsPbBr3 SA，我们首次在中红外区域成功实现了无源 Q 开关操作，特别是在 1.9 μm 和 2.8 μm 波长处。在 1.9 μm 波长和 2.8 μm 波长分别实现了 5.57 W 和 5.23 W 的峰值功率。实验结果表明，CsPbBr3 是一种高效的 SA 材料，有望开发出具有宽带宽和高能量输出的脉冲激光器。
{"title":"CsPbBr3 perovskite thin film as a saturable absorber for MIR passively Q-switched lasers","authors":"","doi":"10.1016/j.jlumin.2024.120910","DOIUrl":"10.1016/j.jlumin.2024.120910","url":null,"abstract":"<div><div>Saturable absorbers (SAs) are key devices for passive Q-switching. All-inorganic halide perovskites demonstrate superior stability compared to their organic-inorganic hybrid counterparts, making them more promising candidates as SAs. A high-quality, all-inorganic halide perovskite CsPbBr<sub>3</sub>, designed for mid-infrared (MIR) broadband saturable absorption, has been successfully fabricated. The saturable absorption properties of this material within the MIR region have been thoroughly characterized. Characterization outcomes reveal that CsPbBr<sub>3</sub> possesses outstanding broadband saturable absorption characteristics. For the first time, passive Q-switching operation has been successfully achieved in the MIR region, specifically at wavelengths of 1.9 μm and 2.8 μm, utilizing the CsPbBr<sub>3</sub> SA. Peak powers of 5.57 W at the 1.9 μm wavelength and 5.23 W at the 2.8 μm wavelength were achieved. The experimental results indicate that CsPbBr<sub>3</sub> is an efficient SA material, holding significant promise for the development of pulsed lasers with broad bandwidth and high energy outputs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314455","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}
Pub Date : 2024-09-21DOI: 10.1016/j.jlumin.2024.120911
In this work, in order to explore the near-infrared (NIR) phosphor converted light emitting diodes (pc-LEDs), the NIR phosphor Sr3Ga1.98In0.02Ge4O14:0.03Cr3+, 0.05 Yb3+ was achieved by the high temperature solid-state method, which presents a broadband emission with a large full width at half maximum (FWHM) of 291 nm due to the energy transfer from Cr3+ to Yb3+. The emission intensity (at 423 K) of Sr3Ga1.98In0.02Ge4O14:0.03Cr3+, 0.05 Yb3+ can be maintained at 77 % of room temperature, which is 14 % higher than that before co-doping, indicating that this phosphor has better thermal stability. The NIR pc-LEDs can be fabricated by combining the phosphor Sr3Ga1.98In0.02Ge4O14:0.03Cr3+, 0.05 Yb3+ with the blue LED, which can be applied in night vision. The results demonstrated its potential application value.
{"title":"Improving the thermal stability and luminescence of Sr3Ga1.98In0.02Ge4O14:0.03Cr3+ through the efficient energy transfer","authors":"","doi":"10.1016/j.jlumin.2024.120911","DOIUrl":"10.1016/j.jlumin.2024.120911","url":null,"abstract":"<div><div>In this work, in order to explore the near-infrared (NIR) phosphor converted light emitting diodes (pc-LEDs), the NIR phosphor Sr<sub>3</sub>Ga<sub>1.98</sub>In<sub>0.02</sub>Ge<sub>4</sub>O<sub>14</sub>:0.03Cr<sup>3+</sup>, 0.05 Yb<sup>3+</sup> was achieved by the high temperature solid-state method, which presents a broadband emission with a large full width at half maximum (FWHM) of 291 nm due to the energy transfer from Cr<sup>3+</sup> to Yb<sup>3+</sup>. The emission intensity (at 423 K) of Sr<sub>3</sub>Ga<sub>1.98</sub>In<sub>0.02</sub>Ge<sub>4</sub>O<sub>14</sub>:0.03Cr<sup>3+</sup>, 0.05 Yb<sup>3+</sup> can be maintained at 77 % of room temperature, which is 14 % higher than that before co-doping, indicating that this phosphor has better thermal stability. The NIR pc-LEDs can be fabricated by combining the phosphor Sr<sub>3</sub>Ga<sub>1.98</sub>In<sub>0.02</sub>Ge<sub>4</sub>O<sub>14</sub>:0.03Cr<sup>3+</sup>, 0.05 Yb<sup>3+</sup> with the blue LED, which can be applied in night vision. The results demonstrated its potential application value.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312196","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}
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