发光学报, 2010, 31 (5): 686, 网络出版: 2011-02-15
激发波长和Eu2+的掺杂量对Sr4Al14O25∶Eu2+, Dy3+发光性能的影响
Effects of Excitation Wavelength and the Eu2+-doped Content on Phosphorescence of Sr4Al14O25∶Eu2+, Dy3+
摘要
采用溶胶-凝胶法在低温、还原气氛下制备了长余辉发光材料Sr4Al14O25∶Eu2+,Dy3+。用X射线粉末晶衍射对其进行了物相鉴定,表明在1 200 ℃已经得到纯相的Sr4Al14O25 产物。研究了铕和锶的比值、激发光波长对所制备的Sr4Al14O25∶Eu2+, Dy3+发光性能的影响并对其影响机理进行了探讨。样品的发光性能测试结果表明: 采用溶胶-凝胶法制备长余辉发光材料Sr4Al14O25∶Eu2+, Dy3+, 其灼烧温度比高温固相法灼烧温度低;激发光谱向长波方向延伸时,在488 nm处发射峰增强, 在410 nm处发射峰减弱; 在一定范围内发光强度随着Eu2+量的增加而增强, Eu2+的最佳掺杂量为0.007, Eu2+的掺杂量超过0.007时会发生浓度猝灭。
Abstract
Sol-gels have been used to prepare Sr4Al14O25∶Eu2+, Dy3+ under low temperature at reducing atmosphere. The XRD shows that the production prepared at 1 200 ℃ is pure phase of Sr4Al14O25. Effects of some factors such as different Eu-to-Sr ratio and excitation wavelength were studied, the impact mechanism were also discussed. The obtained results indicate that: sintering temperature of sol-gel method is lower than that of high temperature solid-phase method. The excitation spectra were shifted to the long-wavelength, the 488 nm and 410 nm emission peaks were enhanced with an optimal molar ratio of 0.007 Eu2+.When the concentration is larger than 0.007, concentration quenching will occur.
王仁清. 激发波长和Eu2+的掺杂量对Sr4Al14O25∶Eu2+, Dy3+发光性能的影响[J]. 发光学报, 2010, 31(5): 686. WANG Ren-qing. Effects of Excitation Wavelength and the Eu2+-doped Content on Phosphorescence of Sr4Al14O25∶Eu2+, Dy3+[J]. Chinese Journal of Luminescence, 2010, 31(5): 686.