Rietveld refinement, cluster modelling, growth mechanism and photoluminescence properties of CaWO₄:Eu³⁺microcrystals

Synthesis of Pr3+-doped CaTiO3 using polymeric precursor and microwave-assisted hydrothermal methods: A comparative study

“…It is possible to incorporate cations of different sizes into perovskite structures and distort them from their ideal cubic structures. Substitutions at A (Ca 2+ ) sites can affect the symmetries of these oxides and create cation or oxygen vacancies, which influence band structures significantly and are the main determinants of the electronic structures of such materials [2]. In particular, CaTiO 3 can accommodate rare-earth ions in its structure; therefore, doping with these ions can be used not only to probe local centers but also to tune the optical properties of these materials [3].…”

Energy transfer and luminescent properties in Tb3+ and Eu3+ co-doped CaMoO4/SrMoO4 thin films

“…In the recent years, rare earth ions-doped molybdates have been widely studied due to their excellent chemical, optical, and thermal properties. Rare earth ions doped luminescent materials have abundant emission spectra, because of their 4f orbits with rich energy levels [1][2][3][4][5][6][7][8]. Eu 3+ and Tb 3+ are red and green light activator ions, which have been well investigated in many luminescent materials [9][10][11][12][13][14].…”

“…The red and green luminescence of Eu 3+ and Tb 3+ ions are owing to the 5 D 0 → 7 F J transitions of Eu 3+ and 5 D 4 → 7 F J transitions of Tb 3+ . In addition, the energy can be transferred from Tb 3+ ions to Eu 3+ ions in Tb 3+ and Eu 3+ co-doped CaMoO 4 phosphors, which can lead to the emission color change from green to red and the enhancement of luminescence intensity of Eu 3+ ions [14][15][16][17][18][19][20][21][22][23][24][25]. CaMoO 4 and SrMoO 4 crystals are two good host materials for Eu 3+ and Tb 3+ ions, owing to their scheelite structure and excellent chemical properties.…”

Rare earth based nanostructured materials: synthesis, functionalization, properties and bioimaging and biosensing applications

“…Fluorides are used for their low phonon energy (<400 cm −1 ), which involves a low probability of NR relaxation and therefore provides improved quantum efficiency [177,178], while phosphates are interesting for their biocompatibility and biodegradability [179]. Other matrices based on vanadates [86,180], oxyfluorides [92], wolframates [181][182][183] and molybdates [184,185] are employed to enhance the global luminescent emission of the DC materials, as it will be detailed later.…”