论文部分内容阅读
采用Pechini溶胶-凝胶法结合旋涂工艺制备了Tb~(3+)掺杂Lu_3Al_5O_(12)(简称LuAG:Tb)发光薄膜。前驱体薄膜在850℃左右锻烧得到单一石榴石相的LuAG:Tb薄膜。LuAG薄膜的发射光谱(268nm紫外光激发)对应于Tb~(3+)的~5D_4→~7E_J(J=6～0)和~5D_3→~7F_J特征跃迁,光谱强度随Tb~(3+)掺杂浓度的升高先增强后减弱,在x(Tb~(3+))=2.0%时光谱强度最强,其发光衰减时间为5.14ms。扫描电镜(SEM)和原子力显微镜(AFM)观察显示LuAG薄膜的颗粒度大小和表面粗糙度随煅烧温度的升高而增大。
Tb 3+ -doped Lu_3Al_5O_ (12) (LuAG: Tb) thin films were prepared by the Pechini sol-gel method combined with spin-coating. The precursor film was calcined at about 850 ℃ to obtain a single garnet phase LuAG: Tb film. The emission spectrum of LuAG films (268 nm UV excitation) corresponds to the characteristic transitions of ~ 5D_4 → ~ 7E_J (J = 6 ~ 0) and ~ 5D_3 → ~ 7F_J of Tb ~ (3+) The increase of doping concentration first increases and then decreases, and the intensity of the spectrum is the strongest at x (Tb 3+) = 2.0%. The emission decay time is 5.14 ms. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) observations showed that the particle size and surface roughness of LuAG films increased with increasing calcination temperature.