Article
Materials Science, Multidisciplinary
ChaoFei Luo, Ke Liu, WeiWei Ji, Zhan Li, Liangjun Yin, LuYuan Hao, Xin Xu, Simeon Agathopoulos
Summary: A series of apatite phosphors with a general formula of Ca2+xLa8-x(SiO4)(6)O2-0.5x: Eu2+ were successfully synthesized, showing strong green emission at 510 nm with increasing Ca2+ substitution for La3+ ions and the reduction from Eu3+ to Eu2+ ions. XANES results indicated higher Eu2+ content with increasing x value. Rietveld refinement and XANES analyses suggested that the non-equivalent substitution of Ca2+ for La3+ led to a decrease in the number of O2- ions in the crystal, favoring the reduction of Eu3+ to Eu2+.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
B. A. Aswathy, P. Prabhakar Rao, V. G. Suchithra, Athira K. V. Raj
Summary: A new series of narrow orange emitting phosphors in 1:2 B-site cation ordered Eu3+ doped triple Perovskite Ba3CaNb2O9 were synthesized by the conventional solid-state route. These phosphors exhibit strong absorption below 325 nm and dominant narrow orange emission suitable for near-UV and charge transfer band excitations. They show potential for application in near-ultraviolet-based phosphor-converted white light-emitting diodes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Ke Su, Lefu Mei, Qingfeng Guo, Pengfei Shuai, Yujia Wang, Yukun Liu, Yang Jin, Zhijian Peng, Bo Zou, Libing Liao
Summary: A multi-mode optical pressure sensor based on Eu2+-doped Li4SrCa(SiO4)(2) phosphors has been designed, which shows high sensitivity and accuracy in measuring pressure in various complex environments. The sensor demonstrates improved performance compared to commercially available ruby sensors, with a massive redshift in the emission peak and a new approach in pressure readout method.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xinzhe Zhou, Xiuxiu Feng, Jian Yin, Xiurong Zhang, Panlai Li, Huanrong Li
Summary: A highly efficient blue-emitting phosphor with superior thermal stability was successfully synthesized by heating Eu3+-doped Faujasite Y zeolite under a reducing atmosphere. The intensity and peak value of the phosphor were highly dependent on the calcination temperature and reached a maximum at 1100 degrees C. Under 360 nm excitation, the phosphor exhibited a high quantum efficiency (90%) and thermal stability (the emission intensity at 423 K was about 125% of that at room temperature). White light-emitting diodes (WLEDs) fabricated using this blue phosphor, a yellow Eu2+-SOD phosphor, and a commercially available red Sr2Si5N8:Eu2+ phosphor showed excellent optical performance with a correlated color temperature of 4359 K and a color rendering index of 97. This work provides a new strategy for the synthesis of phosphors with high thermal stability and luminous efficiency.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Peng Hu, Zhaoping Deng, Teshen Wang, Zepeng Li, Yanlin Ma
Summary: A series of Eu3+-doped NaBaBi2(PO4)(3) red phosphors were synthesized and investigated for their strong absorption capacity and suitability for near-ultraviolet-based white light-emitting diodes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Yongping Huang, Zheng Liu, Yuexu Xiong, Wenlin Feng
Summary: The effect of charge compensation agent R+ on the luminescence properties of MgZn2(PO4)(2):Eu3+ phosphors was investigated, and the physical explanation for the improvement of Eu3+ emission intensity by R+ as a charge compensation was given. The fluorescence lifetime of MgZn2(PO4)2 phosphors co-doped 5% Eu3+ and 5% R+ (R = Na and K) was significantly improved, indicating high efficiency orange-red fluorescence under near ultraviolet excitation.
Article
Materials Science, Multidisciplinary
Melissa M. Rodriguez-Garcia, Aleksandar Ciric, Zoran Ristic, J. A. Gareth Williams, Miroslav D. Dramicanin, Ivana Radosavljevic Evans
Summary: A series of new red phosphors based on apatite-type gadolinium silicate host have been synthesised and analysed, showing excellent chemical and thermal stability. These phosphors exhibit efficient Eu3+ narrow-band red emission with exceptional colour purity and can be heavily doped with Eu3+ without concentration quenching of the emission. The structural properties of the apatite-type host were found to have a favorable influence on the efficiency and thermal stability of the emission.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Inorganic & Nuclear
Zhaojiang Liu, Yujuan Dong, Man Fu, Chuang Wang
Summary: Yellow-green emitting phosphors of vanadate Ca5Mg4(VO4)6 (CMV) doped with different concentrations of Ta5+ ions were synthesized. The luminescence properties of the CMV phosphors were measured and discussed in detail. The CMV : 0.5%Ta5+ phosphor showed potential as a yellow-green emitting phosphor in solid-state lighting.
DALTON TRANSACTIONS
(2023)
Article
Physics, Condensed Matter
S. N. Ogugua, H. C. Swart
Summary: In this study, Ca5(PO4)3OH doped with different concentrations of Eu3+ was found to exhibit maximum emission intensity. The luminescence properties of the material were influenced by the excitation wavelength, and temperature-dependent luminescence was observed within specific wavelength ranges. These findings suggest potential applications of this material in displays and luminescence thermometry.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Biao Shen, Jianghang Xu, Qinan Mao, Jiasong Zhong
Summary: A series of solid solution Ca1+xSr2-xAl2O6:Eu3+ (0 <= x <= 1) phosphors were successfully synthesized via a high-temperature solid-state method. The study systematically investigated the phase structures, photoluminescence performances, fluorescence lifetimes, and thermal stability properties of the materials. Results showed that high-performance Eu3+-activated red-emitting phosphors can be achieved through cation substitution, with improvements in luminous intensities and thermal stability.
Article
Materials Science, Ceramics
Ye Tong, YiHang Chen, SunYueZi Chen, RongFei Wei, LiPing Chen, Hai Guo
Summary: A series of novel NGMVO:Eu3+ red phosphors were prepared and showed excellent luminescent properties and thermal stability under near ultraviolet excitation, suggesting potential applications in white light emitting diodes.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Xiangyu Han, Chengrui Xin, Shuxian Wang, Jiaming Wu, Zhengmao Ye, Haohai Yu, Huaijin Zhang
Summary: In Eu3+:K3Lu(PO4)(2), the luminescence of Eu3+ ions in the three different phases shows a significant distinction due to the difference in the local coordination environment. The concentration of Eu3+ doping leads to a polymorphic evolution in Eu3+:K3Lu(PO4)(2), exhibiting noticeable photoluminescence hysteresis during heating and cooling processes. We proposed a feasible information encryption strategy based on these findings, which opens up a new route for lanthanide-based information encryption using phase-change hosts.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Dechuan Li, Gungping Zhu, Xuelian Zhao
Summary: KTb(CO3)2:Eu3+ phosphors with intense stokes emission were synthesized by hydrothermal method. The luminescence color can be transformed from green to red by partly substituting Tb3+ with Eu3+, and the quantum efficiency of KTb(CO3)2:Eu3+ is high, making it a useful material for color-tunable luminescence applications under excitation of ultraviolet light.
Article
Materials Science, Ceramics
Arumugam Raja, G. Annadurai, V. Sivasubramani, K. Ramachandran, R. Kamesh, V. Govindan, P. Vijayakumar, V. Siva, P. Ramasamy
Summary: A series of novel orange-red emitting RbCaF3:0.05Eu3+ phosphors were synthesized, and their composition, structure, and optical properties were studied. The phosphors exhibited efficient excitation under near ultraviolet (nUV) light and emitted a sharp peak at 590 nm. The potential application of RbCaF3:0.05Eu3+ as an orange-red emitting phosphor for white light emitting diodes was also discussed.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Xiaofang Yu, Dengwen Yuan, Xiaoyun Mi
Summary: White-emitting Ca-3(PO4)(2): Dy3+ phosphors were synthesized via hydrothermal method. The pH value and calcination temperature significantly influenced the phosphor morphology and luminescent properties, with samples at pH 7 exhibiting the best luminescence properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
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)