A novel single-phase white phosphor NaBaBO 3 :Dy 3+ ,K + for near-UV white light-emitting diodes

Abstract A novel Dy 3+ -doped NaBaBO 3 white-emitting phosphor has been prepared by high temperature solid-state reaction method. The phase structure and luminescence properties of NaBaBO 3 :Dy 3+ ,K + samples were investigated. Photoluminescence results show that the as-prepared samples could be effectively excited by near-ultraviolet (NUV) light and generate white light emission due to the 4 F 9/2 → 6 H 15/2 (blue) transition and 4 F 9/2 → 6 H 13/2 (yellow) transition of Dy 3+ ions, respectively. The optimum doping concentration of Dy 3+ ions in the NaBaBO 3 host was determined to be 5.0 mol% and the CIE chromaticity of the sample was determined to be (0.301, 0.308). Moreover, the mechanism of K + ion as a charge compensator on the improvement of photoluminescence property and the effect of temperature on the photoluminescence property of NaBaBO 3 :Dy 3+ ,K + were investigated. Furthermore, photoluminescence decay and quantum efficiency behaviors of NaBaBO 3 :Dy 3+ ,K + were also studied. The present work demonstrates that the NaBaBO 3 :Dy 3+ ,K + phosphor is a potential candidate for NUV white light emitting diodes.