Influence of Doping and Coating on the Photoluminescence Properties of Yttrium Aluminum Garnet Phosphors

This paper presents the influence of doping and coating on the photoluminescence (PL) properties of yttrium aluminum garnet (YAG) phosphors. Transition-metal Mn and rare-earth (Re) element doped YAG phosphors were synthesized by the solid-state sintering method. Mn and Re elements such as Eu and Ce were used as activators; they were doped and co-doped into YAG. The maximum PL intensity was obtained from YAG:Ce phosphor. X-ray photoelectron spectrometry analyses investigated the chemical bonding states of Zn 2p, In 3d, and O Is of the conductive-coated YAG:Ce phosphor. The PL intensity of YAG:Ce was enhanced via ZnO and In 2 O 3 coating and surface state modification.

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