Synthesis, characterization and photoluminescence properties of CaSiO3:Eu3+ red phosphor.

摘要: Abstract CaSiO 3 :Eu 3+ (1–5 mol%) red emitting phosphors have been synthesized by a low-temperature solution combustion method. The well characterized powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and optical spectroscopy. PXRD patterns reveal monoclinic phase can be obtained at 900 °C. SEM micrographs show the crystallites with irregular shape, mostly angular. Upon 254 nm excitation, phosphor characteristic fluorescence 5 D 0  →  7 F J (  = 0, 1, 2, 3, 4) of Eu ions. electronic transition located 614 nm corresponding to 2 ions, which is stronger than magnetic dipole 593 nm 1 Different pathways involved in emission process studied. Concentration quenching has observed for concentration > 4 mol%. UV–visible absorption shows an intense band 240 nm undoped 270 nm doped attributed oxygen silicon (O–Si) ligand-to-metal charge-transfer (LMCT) SiO 2− group. energy gap widened increase ion dopant.