Development of photo-luminescent Ca_2MgSi_2O_7:Dy~(3+) phosphor

摘要

Long afterglow phosphors (Ca_(2-x)MgSi_2O_7:Dy~(3+)) were prepared by solid state reaction under a weak reductive atmosphere. X ray diffraction patterns, Scanning electron microscopy, EDX, Photo-luminescence spectra, absorption spectra were investigated. The phosphor showed the combination of the 482nm blue emission corresponding to the ~4f_(9/2) →~6H_(15/2) transitions and 575nm yellow emission corresponding to the ~4f_(9/2) →~6H_(13/2) transition yielded white light emission.