标题:
NaLa1-xEux(WO4)2的燃烧法制备及发光性能Combustion Synthesis and Luminescence Properties of NaLa1-xEux(WO4)2 Phosphors
作者:
钱先华, 张大凤, 杜明霞, 高岩岩, 蒲锡鹏, 张秀兰, 马婧
关键字:
燃烧法, NaLa1-xEux(WO4)2;荧光粉, 发光Combustion Method; NaLa1-xEux(WO4)2; Phosphor; Luminescence
期刊名称:
《Material Sciences》, Vol.2 No.1, 2012-01-19
摘要:
采用燃烧法制备了系列NaLa1–xEux(WO4)2红色荧光粉，探索了煅烧温度及Eu3+掺杂量对样品结构与发光性能的影响。分别利用X射线粉末衍射仪(XRD)、紫外/可见/近红外分光光度计(UV-vis)以及荧光分光光度计(PL)对样品进行了表征。结果表明：得到的样品具有四方晶系的白钨矿结构；荧光粉在紫外–近紫外波段均有较强的吸收，在394 nm近紫外光激发下得到发射谱图的主要发射峰为Eu3+的5D0→7F1橙光和5D0→7F2红光特征跃迁发射，红光发射的强度是橙光发射的~6.2倍，有利于得到色纯度较高的荧光粉。
NaLa1–xEux(WO4)2 red phosphors were successfully synthesized by the combustion method. The influences of calcination temperature and Eu3+ doping amount on the structure and luminescence properties of as-synthesized sam-ples were explored. The phase composition and optical properties of as-synthesized samples were studied by X-ray powder diffraction and photoluminescence spectra. UV-vis spectra were used to measure the light absorption spectrum of the phosphors. The results show that the samples have the similar scheelite phase structure belonging to tetragonal system and have strong absorption in the region of UV and near-UV. The luminescence results show that the emission spectra under 394 nm excitation consist of the orange region 5D07F1 (594 nm) and the red region 5D07F2 (617 nm). The high ratio of the red emission to the orange emission is advantageous to obtain a phosphor with good CIE chroma-ticity coordinates.