Enhancement of the luminescence properties of Sr3(PO4)2:Dy3+,Li+ white‐light‐emitting phosphors by charge compensator Li+ co‐doping

Abstract Sr 3 (PO 4 ) 2 :Dy 3+ ,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 3 (PO 4 ) 2 , even when Dy 3+ and Li + were introduced. Under ultraviolet excitation at 350 nm, the Sr 3 (PO 4 ) 2 :Dy 3+ sample exhibited two emission peaks at 483 nm and 580 nm, which were due to the 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 transitions of Dy 3+ ions, respectively. A white light was fabricated using these two emissions from the Sr 3 (PO 4 ) 2 :Dy 3+ phosphors. The luminescence properties of Sr 3 (PO 4 ) 2 :Dy 3+ ,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.