Eu/Tb ions co-doped white light luminescence Y2O3 phosphors
Eu/Tb ions co-doped white light luminescence Y2O3 phosphors
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DOI：
10.1016/j.jlumin.2011.05.036
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发表时间：
2011-12
影响因子：
3.6
通讯作者：
Dong Tu;Yujun Liang;Rong Liu;Daoyi Li
中科院分区：
文献类型：
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作者：
Dong Tu;Yujun Liang;Rong Liu;Daoyi Li
采用共沉淀法，在不同浓度的Eu3+和Tb3+离子掺杂下，合成温度为750 ~ 950℃，制备了具有白色发光的Y2O3:Eu3+， Tb3+荧光粉。用x射线衍射（XRD）和光致发光（PL）光谱对所得荧光粉进行了表征。XRD结果表明，随着烧结温度的升高，合成样品的结晶度增大。在250 ~ 320nm激发下，Eu3+和Tb3+共掺杂的y2o3荧光粉呈现出5个主要发光峰，其中590nm、611 nm和629nm处有3个发光峰来自Eu3+， 481 nm和541nm处有2个发光峰来自Tb3+。通过改变激发波长可以改变白光的发光颜色。将不同浓度的Eu3+和Tb3+离子诱导到y2o3晶格中，发现了Tb3+→Eu3+离子在这些荧光粉中的能量转移。国际发光委员会（CIE）色度测试表明，Y2O3:Eu3+， Tb3+荧光粉能发出强烈的白色发光。
Y2O3:Eu3+, Tb3+phosphors with white emission are prepared with different doping concentration of Eu3+and Tb3+ions and synthesizing temperatures from 750 to 950°C by the co-precipitation method. The resulted phosphors were characterized by X-ray diffraction (XRD) and photoluminescence (PL) spectroscopy. The results of XRD indicate that the crystallinity of the synthesized samples increases with enhancing the firing temperature. The photoluminescence spectra indicate the Eu3+and Tb3+co-doped Y2O3phosphors show five main emission peaks: three at 590, 611 and 629nm originate from Eu3+and two at 481 and 541nm originate from Tb3+, under excitation of 250–320nm irradition. The white light luminescence color could be changed by varying the excitation wavelength. Different concentrations of Eu3+and Tb3+ions were induced into the Y2O3lattice and the energy transfer from Tb3+→Eu3+ions in these phosphors was found. The Commission International de l’Eclairage (CIE) chromaticity shows that the Y2O3:Eu3+, Tb3+phosphors can obtain an intense white emission.