Tunable correlated color temperature of NaSrPO4 phosphors via Dy3+ and Eu3+ co-doping for warm white light-emitting diodes
Tunable correlated color temperature of NaSrPO4 phosphors via Dy3+ and Eu3+ co-doping for warm white light-emitting diodes
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DOI：
10.1016/j.ijleo.2018.08.055
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发表时间：
2018-12
期刊：
影响因子：
3.1
通讯作者：
Yang Li;Jiachao Chen;Chao Chen
中科院分区：
文献类型：
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作者：
Yang Li;Jiachao Chen;Chao Chen
通过Dy3+和Eu3+共掺杂调整了nasrpo4荧光粉的相关色温（CCT）。采用高温固相烧结法合成了纯净和掺杂的nasrpo4荧光粉。研究了荧光粉的晶体结构和发光性能。NaSrPO4:Dy3+在481和576 nm处出现两个新的发射峰，分别来自于Dy3+的4f9 /2→6h15 /2和4f9 /2→6h13 /2的跃迁；NaSrPO4:Dy3+、Eu3+在5d0→7FJ（J = 1,2）的跃迁中出现两个新的发射峰，分别位于590和612 nm。随着Eu3+掺杂浓度从0到0.07的变化，NaSrPO4:Dy3+， Eu3+的发射光由蓝白色（CCT: 10,150 K）变为红白色（CCT: 5186 K）。此外，还研究了Dy3+、Eu3+共掺杂nasrpo4荧光粉中Dy3+离子向Eu3+离子的能量转移现象。综上所述，NaSrPO4:Dy3+， Eu3+荧光粉是一种用于近紫外泵浦暖白光二极管的新型全彩色单相暖白光荧光粉。
Correlated color temperature (CCT) of NaSrPO4phosphors were tuned through the co-doping of Dy3+and Eu3+. The pure and doped NaSrPO4phosphors were synthesized by a high temperature solid-state sintering method. The crystal structure and luminescent properties of the phosphors were studied. NaSrPO4:Dy3+phosphors exhibit two emission peaks at 481 and 576 nm, originating from the transitions of4F9/2→6H15/2and4F9/2→6H13/2of Dy3+, while two new emission peaks at 590 and 612 nm originating from the transitions of5D0→7FJ(J = 1, 2) of Eu3+appear for NaSrPO4:Dy3+, Eu3+. With the changing Eu3+doping concentration from 0 to 0.07, the emission light of NaSrPO4:Dy3+, Eu3+changes from bluish white (CCT: 10,150 K) to reddish white (CCT: 5186 K). Furthermore, the energy transfer phenomenon from Dy3+ions to Eu3+ions in Dy3+, Eu3+co-doped NaSrPO4phosphors was also investigated. All in all, the NaSrPO4:Dy3+, Eu3+phosphors are a new kind of full color single phase warm white emitting phosphors for near ultraviolet pumped warm white light-emitting diodes.