Article
Materials Science, Multidisciplinary
M. E. Alvarez-Ramos, J. Alvarado-Rivera, F. Felix-Dominguez, R. C. Carrillo-Torres, R. Sanchez-Zeferino, G. Saavedra-Rodriguez
Summary: A series of TeO2-GeO2-ZnO glasses doped with Tb3+ and Eu3+ in different ratios were investigated for their luminescent and colorimetric properties in lighting devices. X-ray diffraction and Raman spectroscopy confirmed the glassy nature of the fabricated samples. The doping effects were analyzed through fluorescence and time-resolved spectroscopy. Energy transfer between Tb3+ and Eu3+ ions was observed, with Tb3+ -> Eu3+ being the main interaction type, and the CIE1931 chromaticity coordinates showed multicolor tuning from green to orange-red.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Hou-Xian Chen, Yu-Chun Ren, Zhi-Jian Li, Yu-Guo Yang
Summary: The study focuses on the luminescence characteristics of Tb3+/Eu3+ doped SrLaGa3O7 phosphors synthesized through calcining processes. Results show that these phosphors exhibit tunable luminescence in a wide range, with an energy transfer efficiency of 64.273% in the SrLa0.92Tb0.02Eu0.06Ga3O7 phosphor. Thermal stability was confirmed via temperature-dependence emission spectra, with a thermal quenching temperature of around 400 K.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Crystallography
Julija Grigorjevaite, Arturas Katelnikovas
Summary: Scientists are studying new inorganic luminescent materials that can be excited with near-infrared radiation. These materials have various applications such as luminescent thermometers, bio-imaging agents, and anti-counterfeiting pigments. The authors report the synthesis and investigation of two series of K2Gd(PO4)(WO4):20%Tb3+ with different doping concentrations of Eu3+ and Yb3+. The optical properties of these materials, including reflection, excitation and emission spectra, fluorescence lifetime, and quantum efficiency, were studied using steady-state and kinetic spectroscopy.
Article
Materials Science, Multidisciplinary
Xuan Gu, Xiao-Yu Sun, Zheng He, Li-Dan Xu, Ming-Fang Shi
Summary: The study demonstrates the energy transfer from Tb3+ to Eu3+ in Tb3+/Eu3+ codoped Y2Mg2Al2Si2O12 phosphors, with the efficiency increasing with the concentration of Eu3+. This energy transfer results in a noticeable change in emission color.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Bing Yan, Yi Wei, Wei Wang, Meiqian Fu, Guogang Li
Summary: This study has successfully achieved narrow red emission modulation and thermal quenching improvement by designing Eu3+-> Mn4+ energy transfer in LuAG host, showing promising potential in optical thermometry sensors.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Xiang-Gang Zuo, Yi Wang, Lei Wei, Xian-Shun Lv, Yang-Bin Fu, Jing Li, Yuan-Yuan Zhang, Xu-Ping Wang, Bing Liu, Yu-Guo Yang
Summary: In this study, Eu3+/Tb3+ doped LGS phosphors were synthesized with excellent performance, and the effects of doping on the lattice structure and energy transfer mechanism were investigated, leading to optimized luminescence properties.
Article
Optics
Xin Zhang, Junfeng Li, YuMei Shu, Kun Luo, Hengquan Liu, Peicong Zhang, Yi Huang, Guosheng Liu, Yi Fan
Summary: This article discusses the synthesis of tunable CaZrO3 phosphors through citric acid-fueled combustion method and investigates the impact of different dopant ions on their luminescent properties, providing valuable insights for the development of W-LED devices.
JOURNAL OF LUMINESCENCE
(2022)
Article
Engineering, Electrical & Electronic
Seungyong Shin, Sangmoon Park
Summary: Color-tunable and chromatic-stable Bi3+-Tb3+-Eu3+-doped barium-yttrium-orthogermanate phosphors were prepared under UV excitation. Orthogermanate phosphors with a trigonal unit cell structure (R3 ($) over barH) were synthesized using a LiCl flux in air. The photoluminescence excitation and emission spectra of the doped phosphors were studied, and the energy transfer processes between Bi3+-Tb3+, Bi3+-Eu3+, and Tb3+-Eu3+ were discussed.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Optics
Yan Gao, Xingda Zhu, Huihui Shi, Pengfei Jiang, Rihong Cong, Tao Yang
Summary: Eu3+ and Tb3+ are typical red and green-emitting photoluminescent activators, and their photoluminescent properties were systematically studied in a borate LiCaY5(BO3)(6) host. By adjusting dopant concentrations, color-tunable emissions from green to yellow, and to red were successfully achieved. Combining these borates with NUV LED chips exhibited the potential as LED-pumped phosphors, showing typical red, green, and warm white lights.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Junhao Xu, Jie Luo, Lingwei Zeng, Yuqin Tao, Guannan Li, Chunmei Li, Jing Liu, Lei Zhou, Shanshan Hu, Jun Yang, Fulin Lin, Jianfeng Tang
Summary: Red-emitting pyrophosphate phosphors of NaREP2O7:Eu3+ (RE = Sc, Lu) were prepared and characterized in this study. It was found that Eu3+ substitutes Lu3+ in NaLuP2O7:Eu3+, while it substitutes Na+ in NaScP2O7:Eu3+ due to ionic size matching. The optimized doping concentration of Eu3+ resulted in strong luminescence under near-UV excitation. The temperature-dependent luminescence measurements showed that the emission intensity remains high at elevated temperatures. The quantum efficiencies of the phosphors were also evaluated, indicating their potential applications in white light emitting diodes (WLEDs).
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Mohammad M. Afandi, Gian Antariksa, Hyeonwoo Kang, Taewook Kang, Jongsu Kim
Summary: In this study, a tunable blue-green Y2SiO5:Tb3+ powder-based electroluminescent (PEL) device was prepared through a facile screen-printing method. The device exhibits high EL intensity and unique optical properties, making it suitable for sterilization applications.
JOURNAL OF LUMINESCENCE
(2022)
Article
Engineering, Electrical & Electronic
Seungyong Shin, Sangmoon Park
Summary: In this study, Ba6Ca3Al2Si6O24:Ce3+/Tb3+/Na+ phosphors were synthesized, and it was found that co-doping Na+ and Ce3+ into the crystal structure can enhance green emission, along with determining the energy transfer mechanism from Ce3+ to Tb3+. Additionally, the CIE coordinates from blue to green regions were monitored, thermal quenching was observed with increasing temperature, and the activation energy of the Tb3+ transition was calculated. The estimated relative quantum efficiency and internal quantum efficiency were obtained for the Ba5.4Ce0.1Tb0.2Na0.3Ca3Al2Si6O24 phosphors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Applied
Jie Wang, Xiusha Peng, Danzhao Cheng, Zhigang Zheng, Hai Guo
Summary: Single-phase Y2BaAl4SiO12:Tb3+,Eu3+ phosphors with adjustable luminescence were successfully prepared by solid-state reaction method, showing tunable luminescence from green to red with increasing Eu3+ ions. The maximum energy transfer efficiency was found to be 67%, indicating potential applications in solid-state lighting.
JOURNAL OF RARE EARTHS
(2021)
Article
Chemistry, Physical
Polina A. Ryabochkina, Anna Egorysheva, Svetlana Golodukhina, Svetlana A. Khrushchalina, Alina D. Taratynova, Ivan A. Yurlov
Summary: Novel phosphors were synthesized and doped with various rare earth ions in this study, showing different emission properties influenced by the host type and the rare earth ion coordination environment. The co-doping of Eu3+, Dy3+, and Tb3+ ions resulted in a color shift in the emission, demonstrating the potential for tunable luminescent materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Himani Thakur, Arvind K. Gathania, Ishant Kumar, Rajesh Kumar Singh
Summary: This study describes the production and optical characteristics of triply-doped GdPO4. The structure of the material was investigated using X-ray diffraction and Fourier transform infrared spectroscopy, revealing a crystalline monoclinic structure. The excitation and emission spectra of single-doped GdPO4: Tm3+, Tb3+, and Eu3+ were examined, and the triple-doped material exhibited multi-color light emission. The potential application of GdPO4 doped with Tm3+, Tb3+, and Eu3+ in white LEDs was suggested based on the calculated color rendering index, correlated color temperature, quantum efficiency, and thermal stability.
MATERIALS TODAY COMMUNICATIONS
(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)