Synthesis and emission analysis of RE3+ (Eu3+ or Dy3+):Li2TiO3 ceramics

Abstract

The development and photoluminescence analysis of Eu 3+ or Dy 3+ ions in the matrix of lithium titanate (Li 2 TiO 3 ) ceramics by using a solid state reaction method are reported. Emission spectra of Eu 3+ :Li 2 TiO 3 ceramics have shown strong red emission at 611 nm ( 5 D 0 → 7 F 2 ) with λ exci = 392 nm ( 7 F 0 → 5 L 6 ) and from the Dy 3+ :Li 2 TiO 3 , a blue emission at 493 nm ( 4 F 9/2 → 6 H 15/2 ) and also an yellow emission at 582 nm ( 4 F 9/2 → 6 H 13/2 ) have been observed with λ exci = 366 nm ( 6 H 15/2 → 6 P 5/2 ). Both the rare-earth ions containing ceramics have displayed their brighter emission performance from their measured spectral results. In addition, X-ray diffraction (XRD), Fourier transform infra red (FTIR) spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX) have been used to characterize the structural properties of (Eu 3+ or Dy 3+ ):Li 2 TiO 3 ceramics.