Synthesis, refinement of the structure, and AC conductivity behavior of sodium lithium orthonavadates

Enneffati, Marwa; Louati, B.; Guidara, K.

doi:10.1007/s11581-016-1907-7

Cited by 9 publications

(1 citation statement)

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“…The obtained patterns were in close agreement with the orthorhombic structure belonging to space group Cmcm. XRD profiles of all specimens match well with our previous work [15] It was observed that Sm 3+ doping NaCdVO 4 did not influence the main structure of the host because no significant shift of observed peaks in series of doped samples since the doping with Sm 3+ which it's ionic radii r(Sm 3+ , CN=6)=1.09 Å [16] into the Cd 2+ ( [r(Cd 3+ , CN=6)=0.95 Å] site is assumed owing to the small radius percentage difference Dr of both ions. In fact, the percentage difference in ionic radii between substituted and doped ions should be less than 30%.…”

Section: Results and Discussion A X-ray Analysissupporting

confidence: 89%

Synthesis and Characterization of a Novel Sm+3 Activated NaCdVO4 Phosphors for Red Emitting Material

Enneffati¹,

Rasheed²,

Aouani³

et al. 2021

Preprint

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Sm3+ activated NaCdVO4 phosphors were prepared by the simple solid-state reaction method. X-ray diffraction, dispersive energy (EDS), scanning electron microscope (SEM), infrared as well as photoluminescence (PL) techniques were used to characterize obtained samples. Irregular and non-uniform structures were observed by SEM. EDS spectra confirmed the presence of Na, Cd, V, O and Sm elements in each sample. Uuder 405nm excitation, the NaCd1 − xVO4: xSm (x = 0.01, 0.03 and 0.05) exhibits a bright red emission consisting mainly of four wavelength peaks at 556, 593, 650 and 700 nm. The highest emission intensity was found with a composition of x = 0.05. The analysis of PL spectra suggest that studied samples can be used as a red emitting phosphors candidates for fabrication of white LEDs. The CIE chromaticity coordinates of prepared samples were close to the blue-emitting phosphors for NaCdVO4 and red-emitting ones for NaCd0.99Sm0.01VO4, NaCd0.97Sm0.03VO4, and NaCd0.95Sm0.05VO4. The band gap energies of phosphors were calculated from reflectance data using K-M function.

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Section: Results and Discussion A X-ray Analysissupporting

confidence: 89%