Single-component and white light-emitting phosphor BaAl2Si2O8: Dy3+, Eu3+ synthesis, luminescence, energy transfer, and tunable color
Single-component and white light-emitting phosphor BaAl2Si2O8: Dy3+, Eu3+ synthesis, luminescence, energy transfer, and tunable color
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DOI：
10.1016/j.optmat.2016.07.034
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发表时间：
2016-10
影响因子：
3.9
通讯作者：
Pingchuan Ma;Yanhua Song;Ye Sheng;Bo Yuan;Hongxia Guan;Chengyi Xu;H. Zou
中科院分区：
文献类型：
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作者：
Pingchuan Ma;Yanhua Song;Ye Sheng;Bo Yuan;Hongxia Guan;Chengyi Xu;H. Zou
采用传统的固相反应法制备了一系列Dy3+-Eu3+共掺的BaAl2Si2O8荧光粉。研究了它们的晶体结构、发光特性和寿命。对于Dy3+和Eu3+单掺杂的BaAl2Si2O8，Dy3+和Eu3+的最佳掺杂浓度均为0.05。此外，BaAl2Si2O8：0.05Dy3+和BaAl2Si2O8：0.05Eu3+分别发出黄光和红光。由于能量转移，BaAl2Si2O8：Dy3+，Eu3+的发光颜色可以从黄色调到白色。用光致发光光谱和能量供体Dy3+离子的衰变时间证实并研究了Dy3+向Eu3+的能量转移。随着Eu3+浓度的不断增加，BaAl2Si2O8基质中Dy3+到Eu3+的能量转移效率逐渐提高，最高可达81%，量子产率约为47.43%。BaAl2Si2O8：Dy3+，Eu3+可以有效地被紫外光(约348 nm)激发，并通过改变Dy3+和Eu3+的浓度比，发出从黄色到白色的可见光，这表明该荧光粉在显示和照明方面具有潜在的应用前景。
A series of Dy3+- Eu3+co-doped BaAl2Si2O8phosphors were prepared via the conventional solid-state reaction method. Their crystal structure, luminescent characteristic and lifetime were investigated. The optimum doping concentrations of Dy3+and Eu3+are both 0.05 for Dy3+or Eu3+singly doped BaAl2Si2O8. Furthermore, BaAl2Si2O8: 0.05Dy3+and BaAl2Si2O8: 0.05Eu3+emits yellow and red light. The emission color of BaAl2Si2O8: Dy3+, Eu3+could be tuned from yellow to white due to the energy transfer. This energy transfer from Dy3+to Eu3+was confirmed and investigated by photoluminescence spectra and the decay time of energy donor Dy3+ions. With constantly increasing Eu3+concentration, the energy transfer efficiency from Dy3+to Eu3+in BaAl2Si2O8host increased gradually and reached as high as 81%, the quantum yield was about 47.43%. BaAl2Si2O8: Dy3+, Eu3+phosphors can be effectively excited by UV (about 348 nm) light and emit visible light from yellow to white by altering the concentration ratio of Dy3+and Eu3+, indicating that the phosphors have potential applications as a white light-emitting phosphor for display and lighting.