MATIS IMM CNR , via Santa Sofia 64, 95123 Catania, Italy.
Dipartimento di Fisica e Astronomia, Università di Catania , via Santa Sofia 64, 95123 Catania, Italy.
ACS Appl Mater Interfaces. 2015 Aug 26;7(33):18201-5. doi: 10.1021/acsami.5b05348. Epub 2015 Aug 14.
A very bright room-temperature cathodoluminescence (CL) signal, tunable in the visible range by changing the Eu(2+) concentration, has been observed in Eu-doped SiOC films. Depth-resolved CL measurements demonstrate that a bilayer consisting of two SiOC films containing different Eu concentrations allows the continuous tuning of the Eu(2+) emission from blue to green by changing the energy of the exciting electrons. Furthermore, the proper control at the nanoscale of the electron penetration depth allows to obtain a high-quality white light emission. The compatibility of SiOC films with Si technology opens the way to promising applications of Eu-based materials in lighting and display technologies.
在掺 Eu 的 SiOC 薄膜中观察到了非常明亮的室温下的阴极发光（CL）信号，通过改变 Eu(2+)浓度可在可见范围内进行调节。深度分辨 CL 测量表明，由两个含有不同 Eu 浓度的 SiOC 薄膜组成的双层结构可通过改变激发电子的能量，将 Eu(2+)的发射从蓝色连续调谐到绿色。此外，通过在纳米尺度上对电子穿透深度的精确控制，可以获得高质量的白光发射。SiOC 薄膜与 Si 技术的兼容性为基于 Eu 的材料在照明和显示技术中的应用开辟了广阔的前景。
