Review
Chemistry, Multidisciplinary
Ljubica Dacanin Far, Miroslav D. Dramicanin
Summary: Luminescence thermometry is a versatile optical technique for remote temperature measurements, with a wide range of applicability. Recent developments in the field have focused on the use of luminescent nanoparticles, and this review article provides a comprehensive survey of the literature in this area. The benefits and limitations of nanoparticles compared to conventional probes for luminescent thermometry are also discussed.
Article
Optics
Forough Jahanbazi, Xianli Wang, Yuanbing Mao
Summary: By combining Tb3+ and Mn3+ ions with different thermal behaviors, La2Zr2O7:Tb3+,Mn3+ nanoparticles achieved high thermometric sensitivity for optical thermometry. The emission intensity ratio of Tb3+ to Mn3+ over a temperature range showed maximum relative sensitivity of 1.82%·K-1 with minimal uncertainty, proving the promising potential of these dual activators for ratiometric optical thermometry.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Jose Lifante, Yingli Shen, Irene Zabala Gutierrez, Irene Rubia-Rodriguez, Daniel Ortega, Nuria Fernandez, Sonia Melle, Miriam Granado, Jorge Rubio-Retama, Daniel Jaque, Erving Ximendes
Summary: Luminescent nano-thermometry has great potential for in vivo sensing, diagnosis, and therapy, but faces limitations due to tissue attenuation and accuracy issues. This study demonstrates the use of high-brightness Ag2S nanothermometers for reliable and absolute internal organ thermal sensing, through a combination of in vivo and in silico measurements to assess hyperthermia processes and nanoparticle contribution to heating.
Article
Optics
Jiujun Zhu, Peng Du, Jun Wang
Summary: A series of K0.3Bi0.7F2.4:Eu3+@xg-C3N4 composites were synthesized via self-assembly method, which exhibited multicolor emissions and good temperature sensing properties, making them promising candidates for optical thermometers.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Natalia Stopikowska, Marcin Runowski, Malgorzata Skwierczynska, Stefan Lis
Summary: This study explores the impact of pump power on the performance of luminescent thermometers, finding that laser power significantly affects thermometric parameters values, and adjusting laser power can improve the performance of optical nanothermometers.
Article
Chemistry, Inorganic & Nuclear
Jingjing Tang, Yujian Wu, Minkun Jin, YueXin Li, Changheng Chen, Jinmeng Xiang, Chongfeng Guo
Summary: In this study, a noncontact upconversion optical temperature sensor was developed and a flexible thin-film thermometer was fabricated for detecting the temperature of microelectronic components. The results showed stable emission and sensitivity of the sensor, indicating its potential to replace traditional thermometers.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Jiaqi Ou, Shuangqiang Fang, Qiangqiang Zhu, Yue Zhai, Hong Zhang, Le Wang
Summary: A series of SrGa12-xAlxO19:0.5%Cr3+(x = 0, 2, 4, and 6) solid-solution phosphors were successfully synthesized through Al3+ alloying strategy. The introduction of Al3+ can regulate the crystal field and symmetry, achieving the synchronous tuning of E-2 and T-4(2) energy levels and extending the temperature sensing range. Among all samples, SrGa6Al6O19:0.5%Cr3+ showed the widest temperature measuring range from 130 K to 423 K with Sa of 0.0066 K-1 and Sr of 1% K-1@130 K. This work provides a feasible way to extend the temperature sensing range for transition metal-doped LIR-mode thermometers.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Applied
Wei Xu, Xin Zhu, Di Zhao, Longjiang Zheng, Fengkai Shang, Zhiguo Zhang
Summary: This study presents a luminescence ratiometric thermometry technique that achieves high sensitivity and low measurement uncertainty by using a mixture of phosphors and optimizing the dopant concentration of rare earth ions, showing great potential in temperature measurement.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Applied
Lingyun Li, Ziwei Zhou, Fazheng Huang, Senlin Peng, Yantang Huang, Guoqiang Wang, Xinxu Li, Fei-Fei Chen, Chengkai Yang, Xin-Xiong Li, Yan Yu
Summary: By tri-doping with alkaline ions, the up-conversion luminescence and thermometric performance of Er3+, Yb3+ doped Ba2CaWO6 can be controlled, eliminating the Ca2+ vacancy defect and enhancing the quantum efficiency, thereby improving the thermometric sensitivity of Ba2CaWO6.
JOURNAL OF RARE EARTHS
(2023)
Article
Materials Science, Multidisciplinary
Chuan Liao, Feng Chen, Hao Wu, Huajun Wu, Liangliang Zhang, Guo-hui Pan, Feng Liu, Xiao-jun Wang, Jiahua Zhang
Summary: The highly sensitive afterglow intensity ratio (AIR) thermometry based on thermal quenching (TQ) mechanism using Y3Al2Ga3O12:Pr3+ persistent phosphor is reported. The AIR shows strong temperature dependence in the range of 30-170 degrees C, with a maximum relative sensitivity of up to 4.12% degrees C-1 at 170 degrees C. The method is demonstrated by accurately measuring water temperature with an error of only 0.1 degrees C.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Review
Chemistry, Multidisciplinary
Pralay Gayen, Sulay Saha, Vijay Ramani
Summary: This article discusses the importance of low-cost electrocatalysts in fuel cells, water electrolyzers, unitized regenerative fuel cells, and metal-air batteries by studying the structure-activity relationship of pyrochlore oxides. Pyrochlore oxides have the ability to tune their structure and electronic properties, resulting in excellent bifunctional oxygen electrocatalytic activity and high OER selectivity for a wide range of applications. The article also discusses the recent developments and applications of pyrochlore-based electrocatalysts.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Inorganic & Nuclear
Thulitha M. Abeywickrama, Yuanbing Mao
Summary: In this study, Yb3+ and Er3+ co-doped SrMoO4 submicron spindles with strong green upconversion luminescence (UCL) emission were synthesized via a hydrothermal (HT) process without annealing. The UCL intensity of the annealed samples surpassed those produced by the solid-state method and is comparable to that from the commercial NaYF4:Yb,Er sample. The temperature-dependent luminescence of the synthesized samples was also studied.
DALTON TRANSACTIONS
(2023)
Article
Optics
Baobao Zhang, Xiaojun Guo, Zhenglong Zhang, Zhengkun Fu, Hairong Zheng
Summary: Luminescence thermometry is a unique temperature detection technology that offers remote and noncontact functions. Rare earth doped materials, known for their chemical stability and non-blinking properties, have been widely used in luminescent thermometers. With the rapid advancement of nanoscience and nanotechnology, rare earth doped nanoparticles have emerged as promising candidates for luminescence thermometry, providing high spatial resolution and a wide temperature detection range.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
Ziwei Wan, Wanjun Tang, Qingliang You, Biao Xiao, Guangyong Xie
Summary: Two series of Eu-doped (Sr,Ln)(9)MgK(PO4)(7) solid-solution phosphors were synthesized and their crystal structure and luminescence properties were studied. The luminescence of Eu3+ and Eu2+ ions were observed in Eu-doped Sr9MgK(PO4)(7) phosphor synthesized in a reducing atmosphere. The incorporation of Y3+ and La3+ ions, as representatives of rare earth ions, significantly improved the luminescence performance, indicating the stabilization of Eu2+ ions under reductive atmosphere. The proposed strategy proves to be feasible for other Eu2+/3+-coexisting phosphor systems.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Aleksandar Ciric, Zoran Ristic, Jovana Perisa, Zeljka Antic, Miroslav D. Dramicanin
Summary: Temperature sensing using photoluminescence of MgAl2O4:Cr3+ ceramic powder was investigated, showing high relative sensitivity in the physiological range. The intensity of emissions changes with temperature, allowing for temperature measurement.
CERAMICS INTERNATIONAL
(2021)
Article
Green & Sustainable Science & Technology
Ivana Validzic, Vesna Lojpur, Miodrag Mitric
Summary: This study examines the operating characteristics of commercial monocrystalline and amorphous Si-solar cells in both indoor and outdoor settings, with and without the use of a water flow lens (WFL) system. The findings suggest that the WFL system can significantly improve the efficiency of the solar cells, particularly under lower lighting conditions.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Review
Chemistry, Inorganic & Nuclear
L. Marciniak, K. Kniec, K. Elzbieciak-piecka, K. Trejgis, J. Stefanska, M. Dramicanin
Summary: Transition metal ion-activated phosphors have strong absorption and emission bands in the visible and near-infrared spectral ranges, making them sensitive to temperature variations. By observing temperature-induced changes in emission intensities, bandwidths and shifts, excited state lifetimes, and intensity ratios between emission bands, sensitive and reliable remote temperature measurements can be achieved. This review systematically analyzes the performance of luminescent thermometers based on different transition metal ions and discusses the relationship between their spectroscopic properties, host material structure, and thermometric performance. The engineering of energy transfer between transition metal and other dopant ions for highly sensitive thermometers is highlighted, along with several typical application examples from recent literature.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Engineering, Multidisciplinary
Tamara Gavrilovic, Jovana Perisa, Zoran Ristic, Karolina Elzbieciak-Piecka, Lukasz Marciniak, Chong-Geng Ma, Zeljka Antic, Miroslav D. Dramicanin
Summary: We demonstrate a thermal history forensic measurement method based on the emission intensity ratio of Eu3+-doped yttrium vanadate. By observing the increase in phosphor's crystallite size with annealing temperature, we found a significant and permanent increase in emission intensity and symmetry ratio, which serves as an indicator of the maximal temperature to which the phosphor was exposed. Additionally, the irreversible change in the symmetry ratio after exposure to high temperatures was found to be insensitive to the exposure time. Furthermore, thermal history readings can be performed at any temperature.
Article
Chemistry, Analytical
Jovana Perisa, Aleksandar Ciric, Ivana Zekovic, Vesna Dordevic, Milica Sekulic, Zeljka Antic, Miroslav D. Dramicanin
Summary: In this study, the sensitivity of luminescence thermometry was enhanced at high temperatures using a Dy3+-activated yttrium aluminum perovskite material. The material showed a small crystallite size and specific morphology, making it suitable for temperature measurement in high-temperature environments. However, the chemical stability of the host material and temperature quenching remain significant limitations of this method.
Article
Optics
Miroslav D. Dramicanin, Lukasz Marciniak, Sanja Kuzman, Wojciech Piotrowski, Zoran Ristic, Jovana Perisa, Ivana Evans, Jelena Mitric, Vesna Dordevic, Nebojsa Romcevic, Mikhail G. Brik, Chong-Geng Ma
Summary: The near-infrared luminescence of Ca6Ba(PO4)(4)O:Mn5+ is studied and explained in this paper. The phosphor exhibits a narrow emission band and high internal quantum efficiency. The crystal field and Racah parameters are derived, and the appropriate Tanabe-Sugano diagram is calculated to explain the luminescence mechanism. Additionally, the electronic band structure, density of states, and vibrational spectra of the Eu2+ dopant in Ca6Ba(PO4)(4)O are investigated. Finally, the phosphor is applied in luminescence intensity ratio thermometry, showing potential for physiological temperature measurements.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
K. Maciejewska, P. Szklarz, A. Bednarkiewicz, M. D. Dramicanin, L. Marciniak
Summary: This study demonstrated that temperature-driven irreversible structural phase transformations in Eu3+ activated LaPO4, La0.5Y0.5PO4, and YPO4 nanocrystals can be utilized for thermal history measurements in the temperature range of 200°C-1000°C. The changes in Eu3+ local surroundings due to temperature increase modified the intensity and emission spectra, and the intensity ratio of Eu3+ 5D0 -> 7F2 to 5D0 -> 7F1 emissions served as a highly-sensitive indicator of the highest temperature experienced by the nanocrystals. The proposed ratiometric readout strategy enhanced the accuracy of thermal history analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Tijana Stamenkovic, Nadezda Radmilovic, Marija Prekajski Dordevic, Mihailo Rabasovic, Ivana Dinic, Milos Tomic, Vesna Lojpur, Lidija Mancic
Summary: Nanopowders of up-conversion SrGd2O4 orthorhombic (Pnma) phase co-doped with different Yb3+ (1, 2.5 and 5 at%) and constant Er3+ (0.5 at%) ions were prepared via sol-gel assisted combustion. The obtained powders are composed of agglomerated nanoparticles with a uniform distribution of all elements. Increasing Yb3+ content enhances the up-conversion emission in the visible spectrum, leading to a significant change in the green to red ratio. Two-photon up-conversion processes are established through Er3+ f-f electronic transitions, resulting in green emission at 523 and 551 nm and red emission at 661 nm. The nanoparticles doped with 0.5 at% Er3+ and co-doped with 5 at% Yb3+ exhibit the highest absolute quantum yield of 0.055% under specific excitation conditions.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Multidisciplinary
A. V. Racu, Z. Ristic, A. Ciric, V. Dordevic, G. Buse, M. Poienar, M. J. Gutmann, O. Ivashko, M. Stef, D. Vizman, M. D. Dramicanin, M. Piasecki, M. G. Brik
Summary: This study investigates the correlation between optical properties, local symmetry, and crystal structure in CaF2 and BaF2 fluoride crystals doped with ErF3. The differences in optical properties between CaF2 and BaF2 crystals at room temperature are observed and attributed to the differences in cationic radius and dopant-host ionic radius. The determined symmetries and bond lengths of Er3+- F- ions in both crystals are reported. This study provides valuable insight into the development of lanthanide-doped optical materials.
Article
Materials Science, Multidisciplinary
Wojciech M. Piotrowski, Riccardo Marin, Maja Szymczak, Emma Martin Rodriguez, Dirk H. Ortgies, Paloma Rodriguez-Sevilla, Miroslav D. Dramicanin, Daniel Jaque, Lukasz Marciniak
Summary: Lifetime-based luminescence thermometry enables accurate deep-tissue monitoring of temperature changes, but short lifetimes and poor brightness limit its performance. A solution to these limitations is the design and optimization of luminescent nanothermometers co-doped with transition metal and lanthanide ions, which exhibit strong near-infrared emission and long temperature-dependent photoluminescence lifetime. These nanothermometers, combined with a custom-made instrument, allow for obtaining 2D thermal maps for deep-tissue thermal mapping. This study provides foundations for the deployment of lifetime-based thermometry for accurate deep-tissue temperature monitoring.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bojana Milicevic, Jovana Perisa, Zoran Ristic, Katarina Milenkovic, Zeljka Antic, Krisjanis Smits, Meldra Kemere, Kaspars Vitols, Anatolijs Sarakovskis, Miroslav D. D. Dramicanin
Summary: We present a hydrothermal synthesis method for ultrasmall Yb3+/Tm3+ co-doped Sr2LaF7 (SLF) upconversion phosphors. By varying the concentrations of Yb3+ (x = 10, 15, 20, and 25 mol%) and Tm3+ (y = 0.75, 1, 2, and 3 mol%), the emissions in the near IR spectral range were analyzed. Structural analysis revealed that Yb3+ and Tm3+ occupy the La3+ sites in the SLF host. The addition of Yb3+/Tm3+ ions significantly affected the lattice constant, particle size, and PL emission properties of the synthesized SLF nanophosphor. The optimal dopant concentrations for upconversion luminescence were found to be 20 mol% Yb3+ and 1 mol% Tm3+ with EDTA as the chelating agent. Strong upconversion emission of Tm3+ ions around 800 nm was achieved under 980 nm light excitation. The study suggests potential applications of ultrasmall Yb3+/Tm3+ co-doped SLF phosphors in fluorescent labels for bioimaging and security.
Article
Biophysics
Jelena Papan Djanis, Jovana Perisa, Patricija Hribar Bostjancic, Katarina Mihajlovski, Vesna Lazic, Miroslav Dramicanin, Darja Lisjak
Summary: Colloidal stabilization is crucial for the preparation of magnetic nanoparticles for biomedical applications. In this study, tannic acid was used as a coating for barium hexaferrite nanoplatelets (BSHF NPLs) to achieve stability in aqueous media. The coated BSHF NPLs were characterized and their magnetic properties were measured. The stable colloids were tested in biological media, and the antimicrobial properties were examined. To enhance antimicrobial activity, tannic acid was used as a platform for the in-situ production of silver on BSHF NPLs. The hybrid material exhibited magnetic properties and excellent antimicrobial activity against Escherichia coli and Staphylococcus aureus.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Genetics & Heredity
Andrea Pirkovic, Vesna Lazic, Biljana Spremo-Potparevic, Lada Zivkovic, Dijana Topalovic, Sanja Kuzman, Jelena Antic-Stankovic, Dragana Bozic, Milica Jovanovic Krivokuca, Jovan M. Nedeljkovic
Summary: Dry olive leaf extract (DOLE) and its active component oleuropein (OLE) were used to synthesize colloidal silver nanoparticles (Ag NPs) with a size range of 20-25 nm. The cytotoxicity, genotoxicity, and antimicrobial activity of these Ag NPs were evaluated. The results showed that Ag/OLE exhibited the highest cytotoxicity, while Ag/DOLE and Ag/OLE did not induce genotoxic effects. Ag/OLE also demonstrated superior antimicrobial activity against different microorganisms compared to Ag/DOLE. However, the high concentrations of Ag/OLE could induce cytotoxicity in healthy human cells, suggesting potential risks.
Article
Chemistry, Analytical
Tahani A. Alrebdi, Abdullah N. Alodhayb, Zoran Ristic, Miroslav D. Dramicanin
Summary: In this study, the performance of single- and multiparametric luminescence thermometry based on the temperature-dependent spectral features of Ca6BaP4O17:Mn5+ near-infrared emission was investigated. Experimental results showed that as the temperature increased, the intensities of the T-3(2) and Stokes bands increased, while the peak of the E-1 emission band redshifted. The multiparametric luminescence thermometry showed comparable performance to the best single-parameter thermometry.
Article
Chemistry, Physical
Tijana Stamenkovic, Dejan Pjevic, Jugoslav Krstic, Maja Popovic, Vladimir Rajic, Vesna Lojpur
Summary: A series of SrGd2O4 samples doped with different concentrations of Sm3+ and Dy3+ were prepared through glycine-assisted combustion synthesis. X-ray Powder Diffraction investigation confirmed the presence of pure orthorhombic lattice SrGd2O4. Energy Dispersive X-ray Spectroscopy showed that the desired elements were incorporated in the structure. Field Emission Scanning Electron Microscopy revealed the morphology of the samples as porous aggregated particles consisting of approximately 50 nm-sized spherical particles. Mercury Intrusion Porosimetry demonstrated the presence of a real permanent 3D pore structure. X-ray Photoelectron Spectroscopy confirmed the successful incorporation of Dy3+ and Sm3+ ions. Down-conversion luminescence spectra showed typical emission transitions for Sm3+ and Dy3+ ions. The energy band gap of the doped samples was calculated to be 4.3 eV using UV-VIS Diffuse Reflectance Spectroscopy. UV-VIS Absorption Spectroscopy observed the photocatalytic degradation process, with approximately 50% of Rhodamine B being mineralized after 4 hours of simulated Sun exposure.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Ceramics
Tijana Stamenkovic, Nadezda Radmilovic, Marko Nikolic, Jelena Ercic, Vesna Lojpur
Summary: This manuscript examines the down-conversion nanopowders of SrGd2O4 doped with different concentrations of Dy3+ or Sm3+ ions in detail. The samples were prepared using the glycine-assisted combustion method and characterized using various techniques. The results demonstrate the influence of dopant concentration on the luminescent properties of SrGd2O4.
SCIENCE OF SINTERING
(2022)
Article
Optics
R. B. Adamov, G. A. Melentev, I. V. Sedova, S. V. Sorokin, G. V. Klimko, I. S. Makhov, D. A. Firsov, V. A. Shalygin
Summary: This study investigates the THz luminescence in doped nanostructures with GaAs/AlGaAs quantum wells under interband optical pumping. The results show that the spatial separation of donors and acceptors can greatly enhance the integrated intensity of THz emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yanru Li, Lei Zhong, Sha Jiang, Yutong Wang, Binyao Huang, Guotao Xiang, Li Li, Yongjie Wang, Chuan Jing, Xianju Zhou
Summary: In this study, a ratiometric luminescent thermometry based on dual-emission centers was developed using co-doped CaNb2O6 phosphors with Bi3+ and Pr3+. The obtained samples exhibited good thermosensitive and thermochromic characteristics, with a maximum absolute sensitivity of 0.09 K-1 @ 528 K and a maximum relative sensitivity of 2.17 % K-1 @ 453 K.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yujing Gong, Yeqing Wang, Zhiyuan Wang, Yijian Sun, Yi Yu
Summary: Single crystals of Dy3+ single-doped and Dy3+/Tb3+ co-doped CaYAlO4 were grown and analyzed. The incorporation of Tb3+ resulted in increased absorption and emission cross sections. The fluorescence lifetimes and branching ratios of the yellow emission were affected by the presence of Tb3+. The deactivation effect of Tb3+ ions and energy transfer mechanism were also discussed.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Lu Chen, Zhuangzhuang Ma, Jian Chen, Wang Guo
Summary: This study focuses on enhancing the thermal robustness of phosphor converter materials by preparing composite ceramics of YAG:Ce combined with high-thermal-conductivity MgO. The composite ceramics showed high density and thermal conductivity at the optimum temperature of 1400℃. Stable laser-driven white light was obtained under blue laser excitation.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yuwei Wu, Chunhui Niu, Lei Wang, Mingqing Yang, Shiyu Zhang
Summary: Er3+-doped germanate-tellurite glasses were prepared and their structure, luminescent, and temperature-sensing properties were studied. The glass exhibited large values of O2 and O6 and its luminescence intensity varied with temperature.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Kensei Ichiba, Takumi Kato, Kenichi Watanabe, Yuma Takebuchi, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Eu-doped YVO4 single crystals with different concentrations were fabricated to evaluate their photoluminescence and scintillation properties. The results showed that the samples doped with Eu exhibited emission peaks due to 4f-4f transitions in PL and scintillation spectra. Based on the pulse height spectra, the light yield of the Eu-doped samples increased with increasing Eu concentration, while the afterglow level decreased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Daiwen Xiao, Hei-Yui Kai, Anjun Huang, Menglin Song, Ka-Leung Wong, Peter A. Tanner
Summary: The emission spectra of Cs2NaEuCl6 nanoparticles synthesized by the hot injection method are explained. The dispersion of the nanoparticles in alkane solvents in the experiment allows the determination of the magnetic dipole radiative rate for the D-5(0) -F-7(1) channel in vacuum, which is in agreement with the calculated value.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Italia V. Barbosa, Geraldine Dantelle, Alain Ibanez, Lauro J. Q. Maia
Summary: The thermal response and luminescence properties of different oxide matrices were evaluated to design more accurate thermal probes. It was found that thermal probes emitting in BW-II provide better thermal sensing with higher signal-to-noise ratio. Additionally, doping Nd3+ in Y2O3 matrix maximizes luminescence intensity, making it a promising matrix for thermal sensing.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xin Li, Yu Zhang, Hongrui Ren, Lunlong Xie, Yinsheng Di, Mengqing Han, Zhaohui Bai, Quansheng Liu, Liangliang Zhang, Jiahua Zhang
Summary: This study successfully prepared phosphor samples based on Ca3-xLuxSc2-xMgxSi3O12:Ce3+ and investigated their luminescence properties. With the increase in Lu-Mg concentration, the peak of the sample redshifted, but the thermal stability gradually decreased. The LD devices made from CLSMS:Ce3+ fluorescent materials showed a decrease in cyan-green light and an increase in red light as the Lu-Mg concentration increased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Tim Pier, Julia Hopster, Thomas Juestel
Summary: This study investigates and reports on several samples of cerium-activated gallium-based garnet phosphors. The optimal activator concentration was found to be 1 atom-%. The size of non-emitting lanthanide ions and the molar concentration of cerium strongly influenced the crystal field splitting, which in turn shaped the excitation and emission wavelengths.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Guijie Zhao, Wei Shi, Xin Xin, Fengcai Ma, Yongqing Li
Summary: This study reveals for the first time the proton transfer pathways and changes in the photophysical properties of P-TNS with three intramolecular hydrogen bonds. The reaction mechanism and driving force for the proton transfer process are explained through analysis of potential energy surface, frontier molecular orbitals, and hydrogen bond parameters, among others.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Rupesh A. Talewar
Summary: A series of Li2TiO3 phosphors doped with Mn4+ and codoped with Mn4+ and Er3+ were synthesized, which demonstrated the ability of Mn4+ ions to absorb UV-Vis photons and subsequently transfer energy to Er3+ ions, resulting in the emission of near-infrared light. These materials have the potential to enhance the absorption efficiency of Er3+-based luminescent materials.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xingyuan Ma, Jianfeng Li
Summary: Carbon quantum dots (CQDs) with tunable photoluminescence properties have been synthesized using suitable carbon and dopant sources in an aqueous system. The synthesized CQDs exhibited blue, green, yellow, and red emissions, and solid-state luminescence was achieved through the preparation of solid-state fluorescent films and phosphors. This study provides important technical support for the future development of CQDs synthesis.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
De Bin Fu, Yang Bing Xu, Yu Teng Zhang, Shan Ting Liu, Xiao Fei Yang, Sheng Hua Liu
Summary: A pair of new chiral molecules, (S)-4 and (R)-4, have been designed and synthesized by introducing valine-containing groups at symmetrical positions on the periphery of an indolo[3,2-b]carbazole unit. These molecules exhibit aggregation-induced circular dichroism (AICD) properties in DMF/water mixtures, and in a mixture with 99% water fraction, they show strong, mirror-image, blue circularly polarized luminescence (CPL) signals.
JOURNAL OF LUMINESCENCE
(2024)
