Emission analysis of Sm {sup 3+} and Dy {sup 3+}: Ba {sub 3} Y {sub 2} WO {sub 9} ceramics

摘要: A series of Sm{sup 3+} and Dy{sup 3+} ions activated Ba{sub 3}Y{sub 2}WO{sub 9} (BaYW) ceramics were synthesized by using a conventional solid state reaction method. Photoluminescence spectra of Sm{sup 3+} and Dy{sup 3+}: BaYW ceramics have shown strong reddish-orange (596 nm) and blue (494 nm) emission. The tetragonal phase structure has been assigned to the prepared ceramics by the measurement of X-ray diffraction (XRD) profiles. Agglomeration and the nanometer particle size (130 nm to 220 nm) were observed from the SEM images of the ceramics. The functional groups like O--H, CO{sub 3}, W--O bonds, Y--O bonds and the elements such as Ba, Y, W, O, Sm and Dy present in the prepared ceramics were identified by measuring the FTIR and EDAX spectra. In this contribution, we have reported the emission properties of Sm{sup 3+} and Dy{sup 3+}: BaYW ceramics to explore them as novel optical materials and also reported the effect of Sm{sup 3+} and Dy{sup 3+} concentration on the luminescence behavior. Decay kinetics of the prominent emission transitions of Sm{sup 3+} and Dy{sup 3+}: BaYW ceramics are also discussed. - Highlights.: Black-Right-Pointing-Pointer Sm{sup 3+} and Dy{sup 3+}: BaYW ceramics were prepared by solid state reaction method. Black-Right-Pointing-Pointer Sm{sup 3+}: BaYW ceramics have shown an intense reddish-orange color emission. Black-Right-Pointing-Pointer Dy{sup 3+}: BaYW ceramics have shown an intense blue color emission. Black-Right-Pointing-Pointer The nature of the transitions observed in the emission spectra is explained. Black-Right-Pointing-Pointer Phenomenon …