Sr_(3)ZnNb_(2)O(9):0.3Eu^(3+),xNa^(+)荧光粉的合成和发光性能研究

Preparation and Luminescence Performance of Sr_(3)ZnNb_(2)O(9)∶0.3Eu^(3+),xNa^(+) Phosphors

本文通过高温固相反应成功制备了Sr_(3)ZnNb_(2)O(9)∶0.3Eu^(3+),xNa^(+)(x=0,0.1,0.2,0.3,0.4,0.5)系列荧光粉。X射线衍射分析和精修结果表明,Eu^(3+)和Na^(+)成功掺杂到Sr_(3)ZnNb_(2)O(9)基质中,并部分取代了Zn^(2+)。采用扫描电子显微镜测试了样品的微观形貌和元素分布。光谱特性和热稳定性研究表明,Na^(+)的最佳掺杂浓度为x=0.2,Na^(+)的引入提高了Sr_(3)ZnNb_(2)O(9)∶0.3Eu^(3+)荧光粉的热稳定性,活化能为0.163 eV。计算出Sr_(3)ZnNb_(2)O(9)∶0.3Eu^(3+),0.2Na^(+)样品的CIE色坐标为(0.618,0.376),相关色温和色纯度分别为1855 K和98.46%。

In this paper,Sr_(3)ZnNb_(2)O(9)∶0.3Eu^(3+),xNa^(+)(x=0,0.1,0.2,0.3,0.4,0.5)phosphors were successfully prepared by high temperature solid-state reaction.XRD patterns and refinement results show that Eu^(3+)and Na^(+)are successfully doped into the matrix and partially substituted Zn^(2+).The microscopic morphology and element distribution of the samples were confirmed by scanning electron microscopy.The spectral characteristics and thermal stability analysis show that the optimal doping concentration of Na^(+)is x=0.2.The introduction of Na^(+)improves the thermal stability of Sr_(3)ZnNb_(2)O(9)∶0.3Eu^(3+)phosphors and the calculated activation energy is 0.163 eV.The CIE color coordinate of the Sr_(3)ZnNb_(2)O(9)∶0.3Eu^(3+),0.2Na^(+)samples is calculated to be(0.618,0.376),the correlated color temperature and the color purity are 1855 K and 98.46%,respectively.