稀土掺杂磷酸锌镁单基质白光荧光粉的制备及性能研究
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- 英文论文题名：Synthesis and luminescence properties of rare earth doped MgZn_2(PO_4)_2 phosphor for single phase white light emitting
- 论文作者：徐梦姣 ; 王鲁香 ; 丁一 ; 贾殿赠
- 英文论文作者：Mengjiao Xu ; Luxiang Wang ; Yi Ding ; Dianzeng Jia ; Institute of Applied chemistry ; Xinjiang University
- 年：2016
- 作者机构：新疆大学应用化学研究所;
- 论文关键词：稀土 ; 单基质 ; 荧光粉
- 英文论文关键词：Rare earth ; single-phase ; phosphor
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十七分会：光化学
- 语种：中文
- 分类号：TQ422
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：2
- 文件大小：265k
- 原文格式：D
- 会议级别：全国
摘要
白光LED以能耗低、效率高、反应快、体积小、寿命长、安全、绿色环保等优点,被誉为下一代照明光源。目前,实现白光LED的主流方案是荧光粉转换型材料。但适用于紫外芯片激发的发光效率高、热稳定性好的荧光粉较少。而单基质白光荧光粉越来越受到人们的关注。本课题组采用高温固相法制备了颜色可调的Mg Zn_2(PO_4)_2:Ce~(3+),Dy~(3+)荧光粉,并对其发光性能和热稳定性进行研究。在350 nm激发波长下,发射光谱由483 nm和574 nm两组发射峰组成,分别对应于Dy~(3+)的~4F_(9/2-)~6H_(15/2)(蓝光)和~4F_(9/2-)~6H_(13/2)(黄光)的跃迁发射。与单掺的Mg Zn_2(PO_4)_2:Dy~(3+)相比,掺杂少量的Ce~(3+)可有效敏化Dy~(3+)的发光强度。通过调节Ce~(3+)和Dy~(3+)的掺杂比例,可实现由蓝光到白光的变化。当工作温度为423K时,样品Mg Zn_2(PO_4)_2:Ce~(3+),Dy~(3+)的发光强度比初始发光强度减少了10%,说明该材料表现很好的热稳定性。样品的CIE色度坐标(0.2786,0.2770)与标准白光CIE坐标接近,具有潜在应用价值的用于白光LED荧光粉。
A single phase white phosphor Mg Zn_2(PO_4)_2: Ce~(3+), Dy~(3+) was synthesized by co-precipitation method. The structure, photoluminescence properties, energy transfer process and thermal stability of as prepared samples were investigated and discussed. The photoluminescence intensity of Dy~(3+) emission was enhanced remarkably by co-doping Ce~(3+) in the Dy~(3+) single doped Mg Zn_2(PO_4)_2 phosphor. The energy transfer process between Ce~(3+) and Dy~(3+) is proposed to be dominated by the electric dipole- dipole interaction. The novel phosphors have excellent thermal stability and photoluminescence properties. Furthermore, the CIE 1931 chromaticity coordinates of Mg Zn_2(PO_4)_2: Ce~(3+), Dy~(3+) move toward the ideal white light coordinates, which points to its high potential for white light emitting field.
A single phase white phosphor Mg Zn_2(PO_4)_2: Ce~(3+), Dy~(3+) was synthesized by co-precipitation method. The structure, photoluminescence properties, energy transfer process and thermal stability of as prepared samples were investigated and discussed. The photoluminescence intensity of Dy~(3+) emission was enhanced remarkably by co-doping Ce~(3+) in the Dy~(3+) single doped Mg Zn_2(PO_4)_2 phosphor. The energy transfer process between Ce~(3+) and Dy~(3+) is proposed to be dominated by the electric dipole- dipole interaction. The novel phosphors have excellent thermal stability and photoluminescence properties. Furthermore, the CIE 1931 chromaticity coordinates of Mg Zn_2(PO_4)_2: Ce~(3+), Dy~(3+) move toward the ideal white light coordinates, which points to its high potential for white light emitting field.
引文
[1]Shang,M.M.;Li,C.X.;Lin,J.Chem.Soc.Rev.2014,43:1372.
[2]Govind B.N.;Dhoble,S.J.RSC Adv.2015,5:49235.
[2]Govind B.N.;Dhoble,S.J.RSC Adv.2015,5:49235.