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Optical characteristics and luminescence of amorphous BaTiO3 thin films doped with Eu3+
Journal of Non-Crystalline Solids ( IF 3.2 ) Pub Date : 2020-11-04 , DOI: 10.1016/j.jnoncrysol.2020.120515
K.T. Lee , R.A.M. Osman , P. Poopalan

Sol-gel spin coated BaTiO3:Eu3+ thin films on fused silica substrate were thermally annealed between 400°C and 800°C. The multilayer films were doped with Eu3+ which was limited to 10 mol % doping concentration. Standard physical and optical characterizations were performed in addition to excitation-emission and UVPL spectroscopy. The films were amorphous at temperatures below 600°C and exhibited stronger luminescence at 613.0 nm (5D0 → 7F2) than crystalline films. Optical energy band-gap ranged from 3.825 eV (crystalline) to 4.325 eV (amorphous) and the amorphous films’ CIE showed excellent red coordinates whilst red/orange (R/O) asymmetry ratio shows tailored emission color is possible.



中文翻译:

Eu 3+掺杂的非晶BaTiO 3薄膜的光学特性和发光

将熔融石英衬底上的溶胶-凝胶旋涂的BaTiO 3:Eu 3+薄膜在400°C至800°C之间进行热退火。多层膜掺杂有限制为10mol%掺杂浓度的Eu 3+。除了激发发射和UVPL光谱分析外,还进行了标准的物理和光学表征。该膜在低于600°C的温度下为非晶态,并且在613.0 nm(5 D 0  →  7 F 2)处显示出比结晶膜更强的发光。光能带隙范围为3.825 eV(晶体)至4.325 eV(非晶),非晶膜的CIE显示出极好的红色坐标,而红色/橙色(R / O))不对称比表明量身定制的发射颜色是可能的。

更新日期:2020-11-06
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