Structure and luminescence properties of silver-doped NaY(PO3)4 crystal

Masloumi, M. El; Jubera, Véronique; Péchev, Stanislas; Chaminade, Jean‐Pierre; Videau, J.J.; Mesnaoui, Mohamed; Maazaz, M.; Moine, B.

doi:10.1016/j.jssc.2008.07.040

Cited by 10 publications

(6 citation statements)

References 15 publications

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“…The [YO 8 ] polyhedra are distorted antiprisms. The Na coordination is demonstrated to be 8 by El Masloumi et al [11] forming irregular [NaO 8 ] polyhedra. However, Zhu et al [12] consider that Na + ions are hexa-coordinated in NaLa(PO 3 ) 4 materials forming irregular octahedra.…”

Section: Crystallographic Backgroundmentioning

confidence: 99%

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Synthesis and photoluminescence of Eu3+ activated alkali mixed (Li, Na)Y(PO3)4 under VUV-UV excitation

Sebai¹,

Zambón²,

Watras³

et al. 2019

Optical Materials

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One important strategy to further enhance the VUV absorption lies in broadening the light absorption in this VUV wavelength region. The mixing of phosphors is a common solution in the case of obtaining a desired color in the case of WLED. However, the VUV region is very sensitive for the considered materials for such purpose, since the deep penetration is very weak and is very affected by the surface of the grains constituting the phosphor (grain size, morphology) [1]. Consequently the collected fluorescence under VUV excitation is not really representative of the mixture of phosphors when this solution is needed. For this reason, we have explored the possibility to develop strategy where the broadening of the VUV absorption can be reached by one pot synthesis since tunability of the band gap can be allowed simply by modifying the alkali ions in the case of phosphates. Adjusting the ratio between mixed alkali ions in the same material is a promising solution.The luminescence of mixed alkali rare earth cyclo-or poly-phosphates with respective formulas MREP 4 O 12 or MRE(PO 3 ) 4 (M = alkali and RE = rare earth ions) has attracted much attention during the last decades. These compounds are characterized by relatively large cyclic anions or long chains built up by PO 4 3−3tetrahedral connected from each other by at least one or two corners. Such structures are favorable for designing rare-earth (RE)-based

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Section: Crystallographic Backgroundmentioning

confidence: 99%

“…However, Zhu et al [12] consider that Na + ions are hexa-coordinated in NaLa(PO 3 ) 4 materials forming irregular octahedra. Actually, in the yttrium compound [11] the 7th distance in the Na polyhedron is a Na-P one and not a Na-O one.…”

Section: Crystallographic Backgroundmentioning

confidence: 99%

Synthesis and photoluminescence of Eu3+ activated alkali mixed (Li, Na)Y(PO3)4 under VUV-UV excitation

Sebai¹,

Zambón²,

Watras³

et al. 2019

Optical Materials

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“…It is now well established that long-chain polyphosphates with general formula A I B III (PO 3 ) 4 can be divided in seven structural types (Jaoudi et al, 2003). All long-chain polyphosphates of formula NaLnP 4 O 12 (Ln = rare earth element) reported up to now ( El Masloumi et al 2005;Zhu et al 2006;Zhu et al 2008;Horchani-Naifer et al 2009;Koizumi et al 1976;Amami et al 2005;El Masloumi et al 2008;Amami et al 2004;Maksimova et al 1988) belong to the structural type II which has been first described on basis of the KCe(PO 3 ) 4 structure (Linde et al, 1983). A few other A I B III cationic combinations such as AgGd (Naïli et al 2006) and NaBi (Jaoudi et al 2003;Belam et al 2007) also lead to polyphosphates which belong to the structural type II.…”

Section: S1 Commentmentioning

confidence: 99%

Sodium terbium(III) polyphosphate

et al. 2010

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Single crystals of the title compound, NaTb(PO3)4, were obtained by solid-state reaction. This compound belongs to type II of long-chain polyphosphates with the general formula A I B III(PO3)4. It is isotypic with the NaNd(PO3)4 and NaEr(PO3)4 homologues. The crystal structure is built up of infinite crenelated chains of corner-sharing PO4 tetrahedra with a repeating unit of four tetrahedra. These chains, extending parallel to [100], are linked by isolated TbO8 square antiprisms, forming a three-dimensional framework. The Na+ ions are located in channels running along [010] and are surrounded by six oxygen atoms in a distorted octahedral environment within a cut-off distance <2.9 Å.

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“…1 shows the room-temperature X-ray diffraction of the powdered NaYP single crystals. The comparison between the recorded X-ray diffractogram and those of the same family such as M I Sm(PO 3 ) 4 (M I ¼ Na, Ag) [24] allowed the identification of the crystallized phase as NaYP, which crystallizes in the monoclinic system with the space group P2 1 /n, with a ¼ 7.1615(2)Å, b ¼ 13.0077(1), c ¼ 9.7032(3) and b ¼ 90.55(1)1 and Z ¼ 4 [25].…”

Section: Characterizationmentioning

confidence: 99%

“…This evaluation of the crystal field strength can be correlated with the description of the Eu 3+ ion in their environment in the NaYP crystal using the structural data of Masloumi et al [25] and Eu 3+ is substituting the Y 3+ ion; YO 8 is described by C 1 symmetry (Wyckoff notation 4e), surrounded with 8 oxygens. The average Y-O distance is around 2.375Å; the distribution of the Eu-O distances is very low, being 2.306-2.452Å and the distortion of the RE-O 8 site, described by Dd ¼ (1/n)…”

Section: Europium Spectroscopymentioning

confidence: 99%