Design and realization on orange-red emitting of samarium activated sodium lanthanum metaphosphate with low CCT and high CP

Zhou, Yang; Ge, Xinchen; Zhang, Zhuohui; Luo, Wenjie; Xu, Hang; Li, Wufu; Zhu, Jing

doi:10.1016/j.jallcom.2019.152020

Cited by 27 publications

(7 citation statements)

References 36 publications

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“…The incorporation of carboxylate groups enhances the coordination capability, enabling the growth of the coordination network in the coordination compounds [ 38 , 39 , 40 ]. Interactions between this type of ligands and metal centers could give information about their synergistic capability, on the antenna effect, charge transfer transitions, or π-system extension that have been studied previously in other systems [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ].…”

Section: Introductionmentioning

confidence: 99%

Crystallization Induced Enhanced Emission in Two New Zn(II) and Cd(II) Supramolecular Coordination Complexes with the 1-(3,4-Dimethylphenyl)-5-Methyl-1H-1,2,3-Triazole-4-Carboxylate Ligand

et al. 2020

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Two new d10 metal supramolecular metal–organic frameworks (SMOFs) with general formula [ML2(H2O)2]n (M = Zn, Cd) have been synthetized using the sodium salt of the anionic 1-(3,4-dimethylphenyl)-5-methyl-1H-1,2,3-triazole-4-carboxylate ligand (Na+L−). Both SMOFs have been structurally characterized by single-crystal X-ray diffraction analysis and IR spectroscopy. The compounds are isostructural and form supramolecular aggregates via hydrogen bonds with the presence of less common dihydrogen bonds. Interestingly, they show ionic conductivity and porosity. The luminescent properties have been also studied by means of the excitation and emission spectra. Periodic DFT and molecular TD-DFT calculations have been used to unravel the emergence of luminescence in the otherwise non-emitting 1-(3,4-dimethylphenyl)-5-methyl-1H-1,2,3-triazole-4-carboxylate ligand once incorporated in the SMOFs. Our results also illustrate the importance of considering the dielectric environment in the crystal when performing excited state calculations for isolated fragments to capture the correct electronic character of the low-lying states, a practice which is not commonly adopted in the community.

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Section: Introductionmentioning

confidence: 99%

Crystallization Induced Enhanced Emission in Two New Zn(II) and Cd(II) Supramolecular Coordination Complexes with the 1-(3,4-Dimethylphenyl)-5-Methyl-1H-1,2,3-Triazole-4-Carboxylate Ligand

et al. 2020

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“…The excitation spectrum of Y1.94Sm0.06WO6 is shown in the inset of due to concentration quenching. The emission spectra show also a well known broad band at about 450 nm, originating from the WO6 6groups of the host structure [11].…”

Section: Luminescence Spectramentioning

confidence: 85%

“…Sm 3+ is a good competitive candidate as an activator ion in inorganic phosphors. The multicolor luminescent properties of Sm 3+doped phosphors have great potential for use in solid-state lighting devices [11].…”

Section: Introductionmentioning

confidence: 99%

Energy transfer, structural and luminescent properties of the color tunable phosphor Y2WO6:Sm3+

Espinoza

Allan

Castillo

et al. 2020

Journal of Alloys and Compounds

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Inorganic phosphors based on monoclinic Y2WO6 doped with Sm 3+ ions were prepared via conventional solid-state reactions at high temperature. A total of six samples were obtained with different Sm 3+ concentrations (0-9%). The purity of the as-prepared phases was checked by powder X-ray diffraction (PXRD). The excitation, emission, and time-resolved emission spectra were examined in detail. The experimental decay curves were fitted to the Inokuti-Hirayama model, showing that the Sm 3+ ions form clusters at all compositions.Periodic hybrid density functional theory calculations were also carried out on the undoped material and on 144-atom supercells of stoichiometry Y1.9375Sm0.0625WO6 and Y1.875Sm0.125WO6. The different coordination environments at the Y1, Y2 and Y3 sites are analysed in detail. The calculated structure and band gap of Y2WO6 are in good agreement with experiment with one potentially important discrepancy in a Y3-O bond length. The thermodynamically favoured substitution sites for Sm, Y2 and Y3, in the supercell are not those observed under the preparation conditions used here, since the experimental Rietveld analysis suggests occupation of Y1 at all concentrations. Analogous calculations for the Eu-doped system highlight marked differences between Eu and Sm despite their similar ionic sizes. The calculated densities of states show the position of the 4f levels in the band gap depend on the 2 sites occupied by the dopants and thus expect marked differences in the luminescence spectra, opening up possibilities for tuning device performance.

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“…Recently, divalent samarium (Sm 2+ ) has been considered as a promising dopant for white-LED applications and for spectral hole burning [8]. Interestingly, trivalent samarium (Sm 3+ ) can constitute an emission component with high quantum efficiency arising from the emitting 4 G 5/2 4f 5 level [4,[9][10][11][12][13][14][15][16][17][18][19][20]. Overall, combining Sm( n+ ) activators in wide band gap materials can benefit the optical utilizations [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Luminescence and vacuum ultraviolet excitation spectroscopy of samarium doped SrB4O7

Tuomela

Zhang

Huttula

et al. 2020

Journal of Alloys and Compounds

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Design and realization on orange-red emitting of samarium activated sodium lanthanum metaphosphate with low CCT and high CP

Cited by 27 publications

References 36 publications

Crystallization Induced Enhanced Emission in Two New Zn(II) and Cd(II) Supramolecular Coordination Complexes with the 1-(3,4-Dimethylphenyl)-5-Methyl-1H-1,2,3-Triazole-4-Carboxylate Ligand

Crystallization Induced Enhanced Emission in Two New Zn(II) and Cd(II) Supramolecular Coordination Complexes with the 1-(3,4-Dimethylphenyl)-5-Methyl-1H-1,2,3-Triazole-4-Carboxylate Ligand

Energy transfer, structural and luminescent properties of the color tunable phosphor Y2WO6:Sm3+

Luminescence and vacuum ultraviolet excitation spectroscopy of samarium doped SrB4O7

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