Synthesis, structural characterization and VUV excited luminescence properties of LixNa(1−x)Sm(PO3)4 polyphosphates

Sebai, S.; Hammami, Saoussen; Megriche, Adel; Zambón, Daniel; Mahiou, Rachid

doi:10.1016/j.optmat.2016.11.015

Cited by 17 publications

(8 citation statements)

References 29 publications

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“…The IR and Raman spectra, not presented in this paper, are similar to that reported for Li x Na 1-x Sm(PO 3 ) 4 [13].…”

Section: Phase Identificationsupporting

confidence: 85%

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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“…The IR and Raman spectra, not presented in this paper, are similar to that reported for Li x Na 1-x Sm(PO 3 ) 4 [13].…”

Section: Phase Identificationsupporting

confidence: 85%

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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“…The comparison of spectra (Figure 4) and those obtained in previous works in literature for condensed polyphosphates [30, 31] proves that positions of infrared absorption bands are characteristic of phosphates with chain structures.…”

Section: Resultssupporting

confidence: 68%

Structural Study of Europium Doped Gadolinium Polyphosphates LiGd(PO₃)₄ and Its Effect on Their Spectroscopic, Thermal, Magnetic, and Optical Properties

Hammami

Boudjada

Megriche

2018

International Journal of Analytical Chemistry

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Alkali metal-rare earth polyphosphates LiGd(1-x)Eux(PO3)4 (LGP:Eu3+) (where x= 0, 0.02 and 0.04) were synthesized by solid-state reaction. The Rietveld refinement showed the following cell parameters: I 2/a space group, a=9.635(3) Å, b=7.035(3) Å, c=13.191(3) Å, β=90.082°, V= 894.214Å3, and Z=4. The similarity between RF=4.21% and RB=4.31% indicated that the realized refinement is reliable. The crystal structure consists of infinite zig-zag chains of (PO4)3- tetrahedra, linked by bridging oxygen. The acyclic structure of polyphosphates is confirmed by infrared and Raman (IR) spectroscopies. A good thermal stability up to 940°C and paramagnetic behavior of these compounds were also proved by thermal analyses and magnetic susceptibility measurements, respectively. Excitation spectra revealed the charge transfer phenomenon between O2- and Eu3+ (CTB), the energy transfer from Gd3+ to Eu3+, and the intrinsic 4f-4f transitions of Eu3+ where the electronic transitions were also identified. Moreover, LGP:Eu3+ can emit intense reddish orange light under excitation at 394 nm. The strongest tow at 578 and 601 nm can be attributed to the transitions from excited state 5D0 to ground states 7F1 and 7F2, respectively.

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“…The rened lattice parameters, a = 16.3784 (7) Å, b = 7.0373(6) Å, c = 9.6895(5) Å, and b = 126.071(3)°, are well consistent with those obtained from previous works on LiSm(PO 3 ) 4 . 39,40 Following the structural characterization, we have studied the magnetic behaviors of LiSm(PO 3 ) 4 upon analyzing M(T, H) and C p (T, H) data. In Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The refined lattice parameters, a = 16.3784(7) Å, b = 7.0373(6) Å, c = 9.6895(5) Å, and β = 126.071(3)°, are well consistent with those obtained from previous works on LiSm(PO 3 ) 4 . 39,40…”

Section: Resultsmentioning

confidence: 99%

Investigating the magnetic and magnetocaloric behaviors of LiSm(PO₃)₄

et al. 2023

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Synthesis, structural characterization and VUV excited luminescence properties of LixNa(1−x)Sm(PO3)4 polyphosphates

Cited by 17 publications

References 29 publications

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

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

Structural Study of Europium Doped Gadolinium Polyphosphates LiGd(PO₃)₄ and Its Effect on Their Spectroscopic, Thermal, Magnetic, and Optical Properties

Investigating the magnetic and magnetocaloric behaviors of LiSm(PO₃)₄

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Synthesis, structural characterization and VUV excited luminescence properties of LixNa(1−x)Sm(PO3)4 polyphosphates

Cited by 17 publications

References 29 publications

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

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

Structural Study of Europium Doped Gadolinium Polyphosphates LiGd(PO3)4 and Its Effect on Their Spectroscopic, Thermal, Magnetic, and Optical Properties

Investigating the magnetic and magnetocaloric behaviors of LiSm(PO3)4

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Product

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Structural Study of Europium Doped Gadolinium Polyphosphates LiGd(PO₃)₄ and Its Effect on Their Spectroscopic, Thermal, Magnetic, and Optical Properties

Investigating the magnetic and magnetocaloric behaviors of LiSm(PO₃)₄