Journal ArticleDOI
Comparative investigations of the crystal structure and photoluminescence property of eulytite-type Ba3Eu(PO4)3 and Sr3Eu(PO4)3.
Haipeng Ji,Zhaohui Huang,Zhiguo Xia,Maxim S. Molokeev,Xingxing Jiang,Zheshuai Lin,Victor V. Atuchin,Victor V. Atuchin +7 more
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TLDR
The analysis elucidats that the band structures are mainly governed by the orbits of phosphorus, oxygen and europium, and the sharp peaks of theEuropium f-orbit occur at the top of the valence bands.Abstract:
In this study, the Ba3Eu(PO4)3 and Sr3Eu(PO4)3 compounds were synthesized and the crystal structures were determined for the first time by Rietveld refinement using powder X-ray diffraction (XRD) patterns. Ba3Eu(PO4)3 crystallizes in cubic space group I3d, with cell parameters of a = 10.47996(9) A, V = 1151.01(3) A3 and Z = 4; Ba2+ and Eu3+ occupy the same site with partial occupancies of 3/4 and 1/4, respectively. Besides, in this structure, there exists two distorted kinds of the PO4 polyhedra orientation. Sr3Eu(PO4)3 is isostructural to Ba3Eu(PO4)3 and has much smaller cell parameters of a = 10.1203(2) A, V = 1036.52(5) A3. The bandgaps of Ba3Eu(PO4)3 and Sr3Eu(PO4)3 are determined to be 4.091 eV and 3.987 eV, respectively, based on the UV–Vis diffuse reflectance spectra. The photoluminescence measurements reveal that, upon 396 nm n-UV light excitation, Ba3Eu(PO4)3 and Sr3Eu(PO4)3 exhibit orange-red emission with two main peaks at 596 nm and prevailing 613 nm, corresponding to the 5D0 → 7F1 and 5D0 → 7F2 transitions of Eu3+, respectively. The dynamic disordering in the crystal structures contributes to the broadening of the luminescence spectra. The electronic structure of the phosphates was calculated by the first-principles method. The analysis elucidats that the band structures are mainly governed by the orbits of phosphorus, oxygen and europium, and the sharp peaks of the europium f-orbit occur at the top of the valence bands.read more
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Structural and spectroscopic properties of new noncentrosymmetric self-activated borate Rb3EuB6O12 with B5O10 units
Victor V. Atuchin,Victor V. Atuchin,A.K. Subanakov,Aleksandr S. Aleksandrovsky,B. G. Bazarov,J.G. Bazarova,T.A. Gavrilova,Alexander S. Krylov,Maxim S. Molokeev,Aleksandr S. Oreshonkov,S. Yu. Stefanovich +10 more
TL;DR: In this article, a noncentrosymmetric double borate Rb3EuB6O12 was designed and synthesized by the solid state reaction method, and its crystallographic parameters were obtained by Rietveld analysis.
Journal ArticleDOI
Near-ultraviolet and blue light excited Sm3+ doped Lu2MoO6 phosphor for potential solid state lighting and temperature sensing
TL;DR: A series of Sm3+ activated Lu2MoO6 phosphors were synthesized by high-temperature solid-state reaction method, and the X-ray diffraction (XRD) patterns, excitation spectra, emission spectra and decay lifetime of the phosphors are measured to characterize the structural and luminescent properties as mentioned in this paper.
Journal ArticleDOI
NaBaLa2(PO4)3: A novel host lattice for Sm3+-doped phosphor materials emitting reddish-orange light
Li Li,Li Li,Xiaohua Tang,Zhouqing Jiang,Xianju Zhou,Sha Jiang,Xiaobing Luo,Guotao Xiang,Kaining Zhou +8 more
TL;DR: In this paper, a series of red-orange light-emitting NaBaLa2(PO4)3: Sm3+(NBLP:Sm3+) phosphors are designed and synthesized in this work for the first time.
Journal ArticleDOI
Exploration of the Electronic Structure of Monoclinic α-Eu2(MoO4)3: DFT-Based Study and X-ray Photoelectron Spectroscopy
Ali H. Reshak,Zeyad A. Alahmed,Jiri Bila,Victor V. Atuchin,Victor V. Atuchin,B. G. Bazarov,O. D. Chimitova,Maxim S. Molokeev,Igor P. Prosvirin,Alexander P. Yelisseyev +9 more
TL;DR: In this article, the powder α-Eu2(MoO4)3 sample was prepared by the solid-state reaction method and phase purity of the final powder product was verified by X-ray diffraction analysis.
Journal ArticleDOI
Ca6La4(SiO4)2(PO4)4O2:Eu2+: a novel apatite green-emitting phosphor for near-ultraviolet excited w-LEDs
TL;DR: In this paper, a green apatite phosphor Ca6La4(SiO4)2(PO4)4O2:Eu2+ was prepared by conventional high-temperature solid-state reaction.
References
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