A novel single-phase white phosphor NaBaBO 3 :Dy 3+ ,K + for near-UV white light-emitting diodes
2015; Elsevier BV; Volume: 73; Linguagem: Inglês
10.1016/j.materresbull.2015.08.007
ISSN1873-4227
AutoresJianghui Zheng, Qijin Cheng, Jieyang Wu, Xin Cui, Rong Chen, Wenzhi Chen, Chao Chen,
Tópico(s)Perovskite Materials and Applications
ResumoA novel Dy3+-doped NaBaBO3 white-emitting phosphor has been prepared by high temperature solid-state reaction method. The phase structure and luminescence properties of NaBaBO3:Dy3+,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 4F9/2 → 6H15/2 (blue) transition and 4F9/2 → 6H13/2 (yellow) transition of Dy3+ ions, respectively. The optimum doping concentration of Dy3+ ions in the NaBaBO3 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 NaBaBO3:Dy3+,K+ were investigated. Furthermore, photoluminescence decay and quantum efficiency behaviors of NaBaBO3:Dy3+,K+ were also studied. The present work demonstrates that the NaBaBO3:Dy3+,K+ phosphor is a potential candidate for NUV white light emitting diodes.
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