Article
Materials Science, Ceramics
Beiying Zhou, Dong Chen, Jiayi Ye
Summary: The Nd3+-Al3+ co-doped silica glass was successfully synthesized by spark plasma sintering method, using mesoporous powders as raw materials to ensure the homogeneous dispersion of ions. The optimal Nd3+ concentration of 1.0% and Nd:Al ratio of 1:7 were found to result in the best luminescent properties.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Jiquan Zhang, Haiyan Zhao, Ruicong Wang, Angzhen Li, Jie Zhang, Shijie Jia, Gilberto Brambilla, Shunbin Wang, Pengfei Wang
Summary: Ho3+ and Nd3+/Ho3+ doped fluoroaluminate glass samples were fabricated with high transmittance and a wide transparency window, showing emission at 3.9 μm under 808 nm pumping. Nd3+ enhanced the Ho3+ emission, and the most efficient emission was achieved with a concentration ratio of Nd3+: Ho3+ at 1:2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
R. F. Muniz, A. Steimacher, F. Pedrochi, V. S. Zanuto, L. M. Azevedo, J. H. Rohling, M. L. Baesso, A. N. Medina
Summary: Efforts to modify the solar spectrum have led to the development of novel near-infrared-emitting Eu2+ and Nd3+ co-doped sodium calcium silicate glasses. These glasses efficiently convert NUV/Visible light into NIR, making them promising materials for solar cell applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Yiting Tao, Sasa Yan, Ying Du, Panting Wang, Danping Chen
Summary: The addition of Al3+ significantly increased the luminescent intensity of Eu2+-doped glass but decreased the energy transfer efficiency of Eu2+-> Tb3+. Al3+ dispersed Eu2+ and changed its surrounding environment, inhibiting energy transfer between Eu2+ and Tb3+ axes.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yiting Tao, Xiben Ma, Jingang Wang, Ying Du, Panting Wang, Danping Chen
Summary: The photoluminescence and radioluminescence properties of Mn2+/Al3+-, Eu2+/Mn2+-, and Eu2+/Mn2+/Al3+-doped high silica glasses were investigated. It was found that Al3+ improves the luminous intensity of Mn(2+) and decreases the efficiency of Eu2+-> Mn2+ energy transfer. Additionally, Al3+ can broaden the excitation spectrum of Mn2+ and reduce the amount of nonbridging oxygens, resulting in improved radioluminescence intensity. The findings of this study have potential applications in laser and LED lights.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Yinggang Chen, Zhiquan Lin, Hongtao Sun, Yafei Wang, Hehe Dong, Meng Wang, Lei Zhang, Guoping Dong, Xiaofeng Liu, Fei Yu, Shikai Wang, Chunlei Yu, Lili Hu
Summary: This paper proposes a direct coordination engineering approach to enhance the emission at similar to 900 nm instead of similar to 1060 nm in Nd3+-doped materials by introducing halogen to the nearest coordination of Nd3+ in glass. By incorporating iodide into Nd3+-doped silica fibers, a prevailing emission at similar to 900 nm is achieved, and a record-breaking power of 113.5W is realized based on an all-fiber structure.
Article
Materials Science, Ceramics
Juping Ma, Yan Jiao, Chongyun Shao, Yan Sun, Fei Yu, Lili Hu
Summary: In this study, Tb3+/Al3+ co-doped and Al3+ single doped silica glasses were studied as the research objects to investigate the photodarkening mechanism using X-ray as a simulated light source. The optical properties of the glasses before and after X-ray irradiation and the results of electron paramagnetic resonance (EPR) revealed that the photodarkening effect is caused by the valence changes of Tb3+ ions and the energy transfer between Tb3+ ions and related defects. The study further revealed the relationship between the valence changes of Tb3+ ions and various defects in the glass matrix materials, deepening the understanding of the photodarkening mechanism in Tb3+ doped oxide glass. The findings provide theoretical support for the synthesis of Tb3+-doped oxide matrix glass fibers with excellent optical and anti-photodarkening performance.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Nilmar S. Camilo, Jose C. S. Filho, Sidney A. Lourenco, Djalmir N. Messias, Viviane Pilla, Anielle C. A. Silva, Noelio O. Dantas, Acacio A. Andrade
Summary: This study investigated the optical and structural properties of a phosphate glass doped with CdS nanocrystals and Nd3+ ions, confirming the growth of CdS nanocrystals and energy transfer process between CdS and Nd3+ ions. The influence of CdS nanocrystal size on Nd emission lifetime and luminescence quantum efficiency was studied, showing potential for optoelectronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
B. I. Denker, M. P. Frolov, B. I. Galagan, V. V. Koltashev, Yu. V. Korostelin, V. G. Plotnichenko, M. V. Sukhanov, S. E. Sverchkov, A. P. Velmuzhov
Summary: This investigation suggests Tb3+ ions as efficient sensitizers for 5-6 μm Nd3+ emission in selenide glasses. Tb3+ ions can be excited by 2.9 μm Er:YAG as well as by 1.9-2 μm Tm3+ lasers and laser diodes. It was demonstrated that at room temperature, the energy transfer from Tb3+ to Nd3+ is reversible, while at liquid nitrogen temperature, it becomes irreversible. The proposed sensitization scheme could enable the development of neodymium chalcogenide glass lasers emitting at 6 μm.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Katarzyna Halubek-Gluchowska, Damian Szymanski, Thi Ngoc Lam Tran, Maurizio Ferrari, Anna Lukowiak
Summary: Biocompatible nanoparticles with upconversion properties were prepared by the sol-gel method, using silica-calcia glass nanopowders doped with varying concentrations of Tm3+ and Yb3+ ions. The structure, morphology, and optical properties of these nanoparticles were characterized, including the observation of Tm3+ characteristic emission bands at different active ion concentrations. The energy transfer mechanism between Yb3+ and Tm3+ ions in the SiO2-CaO powders was studied through luminescence decay kinetics.
Article
Optics
P. Rekha Rani, M. Venkateswarlu, K. Swapna, Sk Mahamuda, Rupesh A. Talewar, Ch B. Annapurna Devi, A. S. Rao
Summary: This paper investigates the preparation and properties of various concentrations of Nd3+ doped B2O3-BaF2-PbF2-Al2O3 (BaPbAlFB) glasses, and characterizes them through measurements of absorption, photoluminescence, and lifetime. The results indicate the potential of BaPbAlFBNd1.0 glass for applications in fabricating fiber amplifiers and solid-state lasers operating in the near-infrared region at 1063 nm wavelength.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Ceramics
P. Diana, S. Sebastian, S. Saravanakumar, M. Charles Robert, Mohd Shkir
Summary: Zn2-xLaxSiO4 (x = 0.00, 0.02, 0.04, and 0.06) materials with varying weight percentages of lanthanum (La) in zinc silicate (Zn2SiO4) were synthesized using the sol-gel process. The effect of La dopant on the structure, morphology, and optical characteristics of Zn2SiO4 was investigated through various analytical and spectroscopical techniques. The results showed that La3+ ions were incorporated into Zn2SiO4, significantly affecting its crystallinity, morphology, and optical properties. The luminescent peak intensity and lifetime of La-doped Zn2SiO4 were also analyzed.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Sadiye Cetinkaya Colak, Gokhan Kilic
Summary: In this study, zinc-silica-borate glass structures doped with rare earth (RE) oxides Eu2O3 and Nd2O3 were synthesized. The effects of doping with different ratios of two rare earth oxides on the structural, physical, and optical properties of the glass structure were investigated. The results showed that the doping of rare earth oxides can change the structure and optical properties of the glass.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Jessica Dipold, Camila D. S. Bordon, Evellyn S. Magalhaes, Luciana R. P. Kassab, Ernesto Jimenez-Villar, Niklaus U. Wetter
Summary: Random laser action at 1337 nm was demonstrated for the first time using zinc tellurite and aluminum oxide glass matrices doped with neodymium oxide at different percentages. Laser emission was verified and the rise time of the laser pulse and the input-output power slope were obtained. The main lasing mechanism of this random laser system was probably a cavity composed of the sample's pump surface and an effective mirror formed by a second, parallel layer at the gain-loss boundary. The absence of emission at 1064 nm is attributed to the measured temperature rise in the samples' active volume.
Article
Materials Science, Ceramics
Yu Yue, Mingya Fu, Yuying Yang, Wei Chen, Lili Hu, Malgorzata Guzik, Georges Boulon
Summary: The effect of silica-alumina co-introduction on physical and spectroscopic properties of Nd3+-doped potassium phosphate glass was investigated. The Raman and X-ray photoelectron spectroscopy (XPS), physical parameters as well as spectroscopic characteristics were determined and analyzed in detail. The increase of more symmetrical bridge oxygen bonds and more ionic Si-O bonds lead to more centro-symmetric and stronger ionicity of Nd3+ ion coordination environment, which benefit the physical and spectroscopic properties of glasses. When SiO2/Al2O3 ratio was 1.8, the glass showed high emission cross-section, high optical gain parameter, and wider gain bandwidth parameter.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
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)
