Effects of varying Al moles on structure and luminescence properties of ZnAl O1.5+1:0.1 mol% Tb3+ nanophosphors prepared using citrate sol–gel method

Impact of trivalent Yttrium on the structural and optical properties of CaAl2O4: New frontier in supercapacitor positive electrode

“…6 (f) and the CIE coordinates are on Table 2 . This was accomplished using CIE coordinate calculator software [ 10 ]. The CIE diagram showed that varying concentrations of Y 3+ influence the emission colour of the prepared nanophosphor, the 0.1 % Y 3+ sample has shown to emit a vibrant blue–pink hue whereas others were emitting a transiting hue from blue to green within a white vertex region.…”

“…The citrate sol-gel technique was employed to synthesize the CaAl 2 O 4 phosphor [ 10 , 30 , 31 ]. Appropriate mass of calcium nitrate tetra-hydrate Ca(NO 3 ) 2 ∙4H 2 O (98 %), aluminium nitrates nano-hydrate Al(NO 3 ) 3 ∙9H 2 O (98 %) and citric acid C 8 H 8 O 7 ∙H 2 O (99 %) were dissolved in a beaker filled with deionized water (DW).…”

“…The lattice parameters for this structure are a = 8.6996, b = 8.0994, c = 15.217 Å, and β = 90.188° [ 5 ]. This material has been previously synthesized using a variety of techniques such as solvothermal [ 6 ], spray pyrolysis [ 7 ], combustion [ 8 ], co-precipitation [ 9 ], and citrate sol-gel [ 10 , 11 ]. The citrate sol-gel technique is relatively inexpensive, produces samples with high homogeneity, manages stoichiometry better, and low – temperature synthesis [ 12 ].…”

Efficient ultraviolet to far‐red spectral conversion: Tb3+, Cr3+ co‐doped Zn0.5Mg0.5Al2O4 phosphors and their application

“…Therefore, in the ZnAl 2 O 4 spinel structure, the octahedral lattice sites with hexa-coordination are occupied by Al 3+ (r = 0.535 Å, CN = 6), and Tb 3+ is expected to occupy the Al 3+ lattice sites in the ZMAO lattice, and even with an unusual size match, Al 3+ ions are the best candidates to be replaced by Tb 3+ ions. 27,[29][30][31][32][33][34] The observed lifetime values of the Tb 3+ dopant can be understood based on the size of the dopant ion and the size of the cation to be replaced. 27 As shown in Figure S2b, it shows the fluorescence decay curve of ZnAl ] octahedra are connected with one [Zn/MgO 4 ] tetrahedron co-top, and the octahedra can be co-prismatic and co-planar, thus forming a firmly organized ZMAO polyhedron.…”