Article
Materials Science, Ceramics
M. Rakshita, Aachal A. Sharma, Payal P. Pradhan, K. A. K. Durga Prasad, K. Jayanthi, D. Haranath
Summary: A self-activated Zn3V2O8 phosphor-based white light emitting device (WLED) with desired CCT and CRI values was successfully fabricated. The Zn3V2O8 phosphor showed high visible yellow emission and significant quantum efficiency. Combining with blue LED resulted in high-quality white light emission. This work demonstrates the potential of Zn3V2O8 as a candidate for high-quality phosphor-converted WLEDs.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Aleksandr A. Nashivochnikov, Anton I. Kostyukov, Aleksey V. Zhuzhgov, Marianna I. Rakhmanova, Svetlana V. Cherepanova, Valeriy N. Snytnikov
Summary: A series of Eu-doped ZrO2 micropowders with varying concentrations of Eu were studied. The increase in Eu content led to stabilization of the tetragonal phase and stabilization of the cubic ZrO2 phase above a certain concentration. Red luminescence in the samples was found to be caused by radiation transitions in Eu3+ ions.
Article
Materials Science, Multidisciplinary
Vaibhav Chauhan, Pratik Deshmukh, S. Satapathy, Praveen C. Pandey
Summary: This article investigates the effects of Li+ doping on the crystallinity and emission spectrum of Zn-3(VO4)(2) phosphor, demonstrating enhanced broad excitation and emission in the visible region, as well as increased emission band lifetime. The results show potential for utilization of Li+ doped zinc vanadate phosphor with near-UV LED chips to achieve white light.
RESULTS IN PHYSICS
(2022)
Article
Chemistry, Physical
J. Shivakumara, C. Manjunatha, R. Hari Krishna, S. Ashoka, Chikkahanumantharayappa, Manickam Selvaraj, Mika Sillanpaa
Summary: A simple solution combustion method was used to synthesize Na+ and K+ co-doped Cd0.95Eu0.05SiO3 phosphor, and the influence of charge compensators on luminescence performance was systematically investigated. The emission intensity of Cd0.95Eu0.05SiO3 phosphors was enhanced with increasing concentrations of Na+ and K+, reaching optimal co-dopant concentrations at 7 mol%. The enhancement in photoluminescence emission was attributed to the mechanisms of charge compensation and phosphor crystallinity, indicating their potential for optoelectronic applications.
Article
Materials Science, Multidisciplinary
J. Shivakumara, C. Manjunatha, R. Hari Krishna, S. Ashoka, G. Gousiya Bhanu, B. Manmadha Rao, B. Venkateswarlu, Chikkahanumantharayappa, Ajit Khosla
Summary: This study aims to enhance the photoluminescence property of CdSiO3:Eu3+ nanophosphors by co-doping with Zn2+ ions. The results showed that co-doping with Zn2+ ions increased the fluorescence intensity and also affected the crystal structure and size of the phosphors.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Priti Singh, Ram Sagar Yadav, Shyam Bahadur Rai
Summary: Intense red photoluminescence was observed in Eu3+/Z(+) co-doped CaTiO3 perovskite phosphor materials, with XRD and SEM characterization showing increased crystallite and particle size upon alkali ion incorporation. Spectral analysis revealed different transitions and band gap changes during the doping process.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Biotechnology & Applied Microbiology
Atefeh Karami, Rozita Monsef, Mustafa Ridha Shihan, Laith Yassen Qassem, Mayadah W. Falah, Masoud Salavati-Niasari
Summary: This study investigates the synthesis and optimization of erbium vanadate nanostructures using the carboxylic-assisted Pechini method. The optimized ErVO4 nanoparticles show photocatalytic ability for dye decolorization and the correlation between operational parameters and optoelectronic properties is reported. The study also explores the magnetic properties of ErVO4 and confirms the role of hydroxyl radical in the removal of colored pollutants.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Optics
Santosh K. Gupta, Ruma Gupta, B. G. Vats, J. S. Gamare, R. M. Kadam
Summary: Using deep eutectic solvent (DES), europium type (IV) DES (EuDES) was synthesized effectively, showing improved luminescence properties and spectroscopic characteristics.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Ceramics
Yixuan Lv, Le Shi, Jian-Wen Shi, Yijun Zhang, Dandan Ma, Yonghong Cheng, Chunming Niu
Summary: The study successfully increased the photoluminescence quantum yield (PLQY) of vanadate garnet phosphors by introducing indium ions. These indium-doped vanadate garnet phosphors have high PLQY and broad emission, making them suitable for WLED device applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Shota Takemura, Yukinori Koyama, Takayuki Nakanishi, Shiro Funahashi, Naoto Hirosaki, Hidekazu Ikeno, Takashi Takeda
Summary: A new narrow-band emitting phosphor Na2Cs2Sr(B9O15)(2):Eu2+ was discovered using the local structure similarity with a known narrow-band emitting phosphor. Na2Cs2Sr(B9O15)(2):Eu2+ showed violet luminescence peaked at 417 nm with a narrow full-width at half-maximum of 26 nm (1497 cm(-1)).
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Shota Takemura, Yukinori Koyama, Takayuki Nakanishi, Shiro Funahashi, Naoto Hirosaki, Hidekazu Ikeno, Takashi Takeda
Summary: In this study, a new narrow-band emitting phosphor Na2Cs2Sr(B9O15)2:Eu2+ was discovered by analyzing the local structure similarity with a known narrow-band emitting phosphor. The synthesized phosphor exhibited a narrow peak emission at 417 nm and showed violet luminescence.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Pan Liang, Wen-Li Lian, Zhi-Hong Liu
Summary: A highly efficient blue-emitting phosphor of Sr[B8O11(OH)(4)]:xEu(2+) was synthesized through a medium-high temperature boric acid melting method by means of a self-reduction mechanism. It exhibits a quantum yield and color purity of 99%, with a PL intensity remaining at 84% even at 150 degrees C.
CHEMICAL COMMUNICATIONS
(2021)
Article
Materials Science, Ceramics
Hong Ye, Manabu Hagiwara, Shinobu Fujihara
Summary: Meso- and macro-porous Y2WO6:Eu3+ phosphor thin films were successfully fabricated on silica glass substrates using a Pechini-type sol-gel dip-coating method. The choice of alcohol solvents and the amount of ethylene glycol were identified as major factors affecting the size and shape of pores in the thin films. Thin films with macropores showed decreased transmittance for visible light, but enhanced red photoluminescence of Eu3+ ions, particularly on the surface, due to a synergy of increased multiple scattering and suppressed internal reflection of emission light.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Nerea Rodriguez Rodriguez, Brent Grymonprez, Koen Binnemans
Summary: An integrated process using MSA as a lixiviant for the selective separation of valuable rare-earth elements was developed in this study. The process includes selectively leaching three phosphor fractions and purifying the pregnant leach solutions via solvent extraction and vacuum distillation. A conceptual flowsheet for the closed-loop recycling process was presented.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Jedrzej Winczewski, Manuel Herrera, Han Gardeniers, Arturo Susarrey-Arce
Summary: This paper presents the additive manufacturing of three-dimensional structured phosphors emitting red, green, blue, and white, which allows advanced applications in optics and photonics. This development is a step forward in realizing additive color synthesis within complex architectures relevant to integrated optics or light-emitting sources.
CHEMICAL 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)