Structural and Judd-Ofelt intensity parameters of a down-converting Ba2GdV3O11:Eu3+ nanophosphors

Advanced temperature sensing with Er3+/Yb3+ co-doped Ba2GdV3O11 phosphors through upconversion luminescence

“…Employing diffuse reflectance spectrum, the band gap ( E g ) of Ba 2 GdV 3 O 11 phosphors is measured according to the Kubelka–Munk (KM) theory. 75–77 The relation between the diffuse reflectance of the sample R , absorption coefficient ( k ), scattering coefficient ( S ), and absorption coefficient of the material ( α ) are related by the KM remission function F ( R ): 67 …”

“…2), indicating that the insertion of Er 3+ /Yb 3+ does not affect the phase pattern. 67 The Rietveld refinement procedure, performed using the FullProf_Suite program, shows that the synthesized phosphors crystallized into a monoclinic crystal structure with P21/c space group symmetry (14). 70 The unit cell parameters are calculated to be a = 12.374692 Å, b = 7.731662 Å, c = 11.178051 Å, β = 103.56582°, and V = 1029.88 Å 3 .…”

“…Notably, Ba 2 GdV 3 O 11 has been extensively investigated for its doping versatility with several lanthanide ions, including Er 3+ and Yb 3+ . [66][67][68][69][70] In particular, Er 3+ and Yb 3+ ions are strategically employed as the activator and sensitizer, respectively, in UC materials due to their abundant ladder-like energy levels and robust absorption cross-section in the near-infrared (NIR) range. This codoped system presents a promising avenue for precise and efficient thermometry applications, leveraging the unique properties of Er 3+ and Yb 3+ ions in the Ba 2 GdV 3 O 11 host matrix.…”

Rare-Earth Ion-Activated Nanostructured Fluorescent Marker for Easy Naked Eye Detection and Swift Imaging of Latent Fingerprints

“…Recently, materials scientists have shown great interest in trivalent lanthanide (Ln 3+ ) due to its notable applications in areas such as forensics, white light-emitting diodes (LEDs), biological imaging, solar cells, field emission displays (FEDs), sensors and catalysis converters, and many more. − The selection of the correct host lattice was crucial because the luminescence properties of lanthanide-doped phosphors depended significantly on the crystal field atmosphere surrounding the trivalent lanthanide ions (Ln 3+ ) in the host lattice. , Numerous inorganic hosts, including titanates, oxides, fluorides, silicates, and molybdates, have been extensively described for luminescence. − The most efficient luminescent hosts are expensive, require large amounts of thermal energy, and have low physical and thermal stability and a high phonon energy threshold, etc. − To overcome these hurdles, extensive studies have been performed over the past decade on the structural evolution of numerous known phosphors. , Nevertheless, no attention has been paid to the study and further development of the photoluminescence of rare-earth ions from new host lattices. Recently, our luminescent materials and devices group discovered an original host lattice, namely, Eu 3+ -doped Y 2 SrZnO 5 (YSZ:Eu 3+ ).…”

Bright red emission with high color purity from Eu(iii) complexes with π-conjugated polycyclic aromatic ligands and their sensing applications

“…A considerable number of studies have been conducted on the development of various luminescent compounds such as luminescent organic dyes, [1][2][3][4] metal complexes, [5][6][7] and inorganic compounds (nanoparticles and ceramics). [8][9][10][11][12][13][14][15] Recently, Hatakeyama et al successfully prepared a blue luminescent boron-based organic dye with high color purity (full-width at half-maximum (FWHM) of 28 nm) for the fabrication of efficient organic light emitting diodes (LEDs). 16 Jang et al prepared InP/ZnSe/ZnS quantum dots exhibiting strong red luminescence with high color purity (FWHM of 35 nm).…”