Sol–gel preparation and characterization of uniform core-shell structured LaInO3:Sm3+/Tb3+@SiO2 phosphors

Hydrothermal synthesis and luminescent properties of NaLa(MoO4)2:Dy3+ phosphor

“…The absorption bands at 3460 and 1629 cm À 1 are assigned to O-H stretching vibration and H-O-H bending vibration, respectively. The two bands are the characteristic vibrations of water from air, physically adsorbed on the NaLa(MoO 4 ) 2 :0.02Dy 3 þ sample surfaces [21]. In addition, a strong absorption peak at 818 cm À 1 can be assigned to v 3 antisymmetric stretching vibration originating from the Mo-O stretching vibration in MoO 4 2 À tetrahedron [22].…”

LaPO4:Eu3+, LaPO4:Ce3+, and LaPO4:Ce3+,Tb3+ nanocrystals: Oleic acid assisted solvothermal synthesis, characterization, and luminescent properties

“…To date, lanthanum orthophosphates (LaPO 4 ) doped with different RE ions have been reported to be prepared through various methods, including solidstate reaction [31], microwave approach [32,33], sol-gel process [34][35][36], wet-chemical precipitation [37], hydrothermal method [38,39]. However, the practical applicability of these phosphates as phosphors is still limited by their light output, quantum yield and emission, which are directly influenced by their synthesis process to restrict their size, morphology, purity and stoichiometry.…”

Enhanced luminescence intensity and color purity of the red emitting LnVO4:Eu3+@ SiO2 (Ln=Gd, Y and Gd/Y) powder phosphors

“…Normally, SiO 2 exhibits the absorption peaks due to Si-O-Si asymmetric stretching at 1100 cm À1 , symmetric stretching at 803 cm À1 , Si-OH bond at 949 cm À1 and Si-O bending mode at 469 cm À1 . The Si-OH groups play an important role in bonding on phosphor particles from the coating solution (TEOS) for forming YVO 4 :Eu 3+ @ SiO 2 core-shell structures [43,44]. The enhanced absorption intensity and broadness with SiO 2 coating (Fig.…”