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Добірка наукової літератури з теми "Lanthanide ion-doped Phosphors"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Lanthanide ion-doped Phosphors"

1

Gupta, Santosh K., Hisham Abdou, Carlo U. Segre, and Yuanbing Mao. "Excitation-Dependent Photoluminescence of BaZrO3:Eu3+ Crystals." Nanomaterials 12, no. 17 (August 31, 2022): 3028. http://dx.doi.org/10.3390/nano12173028.

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Анотація:
The elucidation of local structure, excitation-dependent spectroscopy, and defect engineering in lanthanide ion-doped phosphors was a focal point of research. In this work, we have studied Eu3+-doped BaZrO3 (BZOE) submicron crystals that were synthesized by a molten salt method. The BZOE crystals show orange–red emission tunability under the host and dopant excitations at 279 nm and 395 nm, respectively, and the difference is determined in terms of the asymmetry ratio, Stark splitting, and intensity of the uncommon 5D0 → 7F0 transition. These distinct spectral features remain unaltered under different excitations for the BZOE crystals with Eu3+ concentrations of 0–10.0%. The 2.0% Eu3+-doped BZOE crystals display the best optical performance in terms of excitation/emission intensity, lifetime, and quantum yield. The X-ray absorption near the edge structure spectral data suggest europium, barium, and zirconium ions to be stabilized in +3, +2, and +4 oxidation states, respectively. The extended X-ray absorption fine structure spectral analysis confirms that, below 2.0% doping, the Eu3+ ions occupy the six-coordinated Zr4+ sites. This work gives complete information about the BZOE phosphor in terms of the dopant oxidation state, the local structure, the excitation-dependent photoluminescence (PL), the concentration-dependent PL, and the origin of PL. Such a complete photophysical analysis opens up a new pathway in perovskite research in the area of phosphors and scintillators with tunable properties.
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2

Tiwari, Ashish, and S. J. Dhoble. "Tunable lanthanide/transition metal ion‐doped novel phosphors for possible application in w‐LEDs: a review." Luminescence 35, no. 1 (October 24, 2019): 4–33. http://dx.doi.org/10.1002/bio.3712.

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3

Kaneva, Ekaterina, Roman Shendrik, Elizaveta Pankrushina, Emilia Dokuchits, Tatiana Radomskaya, Mikhail Pechurin, and Aleksey Ushakov. "Frankamenite: Relationship between the Crystal–Chemical and Vibrational Properties." Minerals 13, no. 8 (July 29, 2023): 1017. http://dx.doi.org/10.3390/min13081017.

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The study provides novel insights into the crystal–chemical and optical characteristics of frankamenite. Frankamenite belongs to a special group (canasite group) of the complex alkaline Ca-(K)-(Na) silicates, and it was found in charoitites from the only known location, Murun Massif, Eastern Siberia, Russia. The crystal–chemical, vibrational, and optical properties of frankamenite were investigated by combining electron probe microanalysis (EPMA), single-crystal X-ray diffraction (SCXRD), infrared (IR) absorption, Raman, UV-Visible absorption, and electron spin resonance (ESR) spectroscopy. The behavior of the peaks in the IR spectra was also studied using ab initio calculations. Detailed characteristics of the internal composition and structure of the mineral species were described, and vibrational and optical properties based on these peculiarities were interpreted. The thermally stimulated reorientation of the H2O molecules and OH− groups was studied by thermo-Raman spectroscopy. Octahedral cationic positions can be readily doped with transition metal and lanthanide ions that provide a promising opportunity to adjust the Ce3+ luminescence. Hence, frankamenite is a potential material for ion exchange, novel phosphors, and luminophores.
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4

Dalhatu, A. S., R. Hussin, B. Ibrahim, Y. A. Yamusa, and A. Baballe. "LUMINESCENCE BEHAVIOUR OF DY3+ ION DOPED MAGNESIUM SULFOBORATE PHOSPHOR FOR WHITE LIGHT EMITTING DIODES." Open Journal of Physical Science (ISSN: 2734-2123) 1, no. 1 (March 10, 2020): 11–15. http://dx.doi.org/10.52417/ojps.v1i1.85.

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Анотація:
Several studies showed the interesting properties of trivalent lanthanide ions when doped in various types of phosphor. Magnesium sulfoborate phosphor doped with different concentrations of Dy3+ were synthesized using solid-state reaction method at 850 °C for 4 hours. The samples were characterized by X-ray Diffraction (XRD). The excitation and luminescence properties of MgO-SO4-B2O3:Dy3+ were determined. The emission spectrum of Dy3+ ion doped MgO-SO4-B2O3 phosphor exhibit three bands at 480 nm, 573 nm and 660 nm with excitation of 386 nm due to 4F9/2 →6H15/2, 6H13/2 and 6H11/2 of Dy3+ transitions, respectively. The excitation spectrum of Dy3+ ion doped MgO-SO4-B2O3 phosphor display several bands at 347 nm, 362 nm, 386 nm, 426 nm, 449 nm and 469 nm with emission of 573 nm, which is in agreement with the ultraviolet LED (349.9–410 nm) and blue LED (450–470 nm). An intense in the emission peak at 573 nm in the yellow region was observed with the 0.5 Dy2O3. The luminescence properties of phosphor show that MgO-SO4-B2O3:Dy3+ phosphor could be potentially used as white LEDs. Dalhatu, A. S. | Department of Physics, Bauchi State University Nigeria, 65 Gadau, Bauchi, Nigeria
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5

Yadav, R. V., S. K. Singh, and S. B. Rai. "Effect of the Li+ ion on the multimodal emission of a lanthanide doped phosphor." RSC Advances 5, no. 33 (2015): 26321–27. http://dx.doi.org/10.1039/c4ra17315e.

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Анотація:
The present study probes the multimodal emission: upconversion, photoluminescence and quantum cutting processes in a Ho3+/Yb3+ co-doped Y2O3 phosphor and further examines the impact of the Li+ ion on the multi-modal emission, for the first time.
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6

Zhang, Cui Miao, Jian Yuan Wang, Ya Min Liu, and Guang Jia. "Template-Directed Synthesis and Upconversion Luminescence of Y2O3 Hollow Spheres." Advanced Materials Research 1052 (October 2014): 198–202. http://dx.doi.org/10.4028/www.scientific.net/amr.1052.198.

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Анотація:
Uniform Y2O3 hollow microspheres have been successfully prepared via a urea-based homogeneous precipitation technique with colloidal carbon spheres as template followed by a subsequent calcination process. The template can be effectively removed and the amorphous precursor has converted to crystalline Y2O3 during the annealing process. SEM images indicate that the hollow spheres inherit the spherical shape and good dispersion of the templates, and the shell of the hollow spheres is composed of a large amount of uniform nanoparticles. The lanthanide activator ion Ln3+-doped Y2O3 hollow microspheres exhibit bright upconversion luminescence with different colors under 980 nm light excitation, which may find potential applications in the fields such as light phosphor powders, advanced flat panel displays, or drug delivery.
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7

Karunakaran, Santhosh Kumar, Gowri Manohari Arumugam, Wentao Yang, Sijie Ge, Saqib Nawaz Khan, Xianzhong Lin, and Guowei Yang. "Research Progress on the Application of Lanthanide-Ion-Doped Phosphor Materials in Perovskite Solar Cells." ACS Sustainable Chemistry & Engineering 9, no. 3 (January 8, 2021): 1035–60. http://dx.doi.org/10.1021/acssuschemeng.0c07319.

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8

Mao, Yini, Li Jiang, Shanshan Hu, Jianfeng Tang, Yu Luo, Xiaoyu Ding, Guannan Chen, and Jun Yang. "A lanthanide ion-doped Ba3Sc2F12 phosphor: hydrothermal synthesis, morphological control, energy transfer, and temperature-sensing performance." Dalton Transactions 49, no. 18 (2020): 5881–89. http://dx.doi.org/10.1039/d0dt01003k.

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9

Gopalakrishna Pillai Leela, Bhagyalekshmi, and Deepthi N. Rajendran. "Effect of lanthanide ion co-doping on the luminescence in the cerium-doped zinc oxide-phosphor system." Spectroscopy Letters 52, no. 8 (September 14, 2019): 431–40. http://dx.doi.org/10.1080/00387010.2019.1659824.

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10

Han, X. M., J. Lin, M. L. Pang, M. Yu, and S. B. Wang. "Sol?gel deposition and luminescence properties of lanthanide ion-doped Y2(1-x)Gd2xSiWO8 (0?x ?1) phosphor films." Applied Physics A 80, no. 7 (February 11, 2004): 1547–52. http://dx.doi.org/10.1007/s00339-004-2506-4.

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