Enhancement of the luminescence properties of Sr (PO ) :Dy ,Li white-light-emitting phosphors by charge compensator Li co-doping.

Sr (PO ) :Dy ,Li phosphors were prepared using a simple high temperature solid method for luminescence enhancement. The structures of the as-prepared samples agreed well with the standard phase of Sr (PO ) , even when Dy and Li were introduced. Under ultraviolet excitation at 350 nm, the Sr (PO ) :Dy sample exhibited two emission peaks at 483 nm and 580 nm, which were due to the F  →  H and F  →  H transitions of Dy ions, respectively. A white light was fabricated using these two emissions from the Sr (PO ) :Dy phosphors. The luminescence properties of Sr (PO ) :Dy ,Li phosphors, including emission intensity and decay time, were improved remarkably with the addition of Li as the charge compensator, which would promote their application in near-ultraviolet excited white-light-emitting diodes.