Optical Property of Dy~(3+)-and Ce~(3+)-Doped Si-B-Na-Sr Glasses

摘要

Novel Dy~(3+) and Ce~(3+) doped Si-B-Na-Sr (SBNS) glasses were synthesized by melt-quenching technique. Excited by 327 nm, the 0.5Dy~(3+)-and 0.5Ce~(3+)-doped SBNS exhibits white emission with Commission Internationale de L'Edairage coordinates of (0.308, 0.280). Basic optical characterizations have been performed by measuring the absorption and emission spectra and calculating Judd-Ofelt intensity parameters, radiative probability, luminescence branching ratio, cross sections, and effective bandwidth. The Judd-Ofelt parameters Ω_2, Ω_4, andΩ_6 indicate a high asymmetrical environment and covalent environment in the optical glass. The emission color of Ce~(3+) and Dy~(3+) cod-oped transparent glass can be tuned from blue to white through energy transfer from Ce~(3+) to Dy~(3+) ions. The resulting glass may have potential application in white-light-emitting source.