Mariscal-Jiménez Antonio, Tarazaga Martín-Luengo Aitana, Galiana Beatriz, Ballesteros Carmen, Bonanni Alberta, Martín-Sánchez Javier, Serna Rosalía
Laser Processing Group, Instituto de Óptica, IO-CSIC, C/Serrano 121, 28006 Madrid, Spain.
Departamento de Tecnologías de la Información, Escuela Politécnica Superior, Universidad CEU-San Pablo, CEU Universities, Campus Montepríncipe, Boadilla del Monte, Madrid 28668, Spain.
J Phys Chem C Nanomater Interfaces. 2020 Jul 16;124(28):15434-15439. doi: 10.1021/acs.jpcc.0c03052. Epub 2020 Jun 16.
The development of broadband and ultracompact optoelectronic devices relies on the possibility of fabricating bright and tunable emitters at the nanoscale. Here, we show emission from EuO (1 ≤ < 1.4) thin films on silicon formed by nanocrystals with average sizes in the range of 5 nm. The photoluminescence emission of the nano-EuO films is tunable as a function of the oxygen concentration changing from a green broadband Eu-related emission to a narrow red Eu-related emission. To reach these results has been instrumental through the use of a new methodology specially designed to achieve high-quality europium oxide films whose compositional properties are controlled by the growth base pressure and preserved thanks to a chemically stable and transparent cover layer of AlO. Our findings confirm the outstanding potential of nanostructured EuO films as "one-compound" optical elements with tunable emission properties for their implementation in integrated silicon-based devices.
宽带和超紧凑型光电器件的发展依赖于在纳米尺度上制造明亮且可调谐发射器的可能性。在此，我们展示了在硅上由平均尺寸在5纳米范围内的纳米晶体形成的EuO （1≤ <1.4）薄膜的发射。纳米EuO 薄膜的光致发光发射可根据氧浓度从绿色宽带Eu相关发射变为窄红色Eu相关发射进行调谐。通过使用一种专门设计的新方法来获得高质量的氧化铕薄膜，其组成特性由生长基压控制，并由于化学稳定且透明的AlO覆盖层而得以保留，从而实现了这些结果。我们的研究结果证实了纳米结构EuO 薄膜作为“单一化合物”光学元件具有出色的潜力，其发射特性可调谐，可用于集成硅基器件。
