Center for Composite Material, Harbin Institute of Technology, Harbin, China.
Phys Chem Chem Phys. 2012 Apr 21;14(15):5100-5. doi: 10.1039/c2cp23236g. Epub 2011 Dec 19.
Three dimensionally ordered macroporous (3DOM) silicon films have been made via ordered polystyrene (PS) templates by electrodeposition from an ionic liquid (IL). For this purpose, the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide ([Py(1,4)]Tf(2)N) with SiCl(4) dissolved in it was used as an electrolyte and the electrodeposition of macroporous silicon could be achieved at room temperature (~20 °C). Self-assembled PS colloidal crystals with different diameters were used as templates. Scanning electron microscopy and X-ray photoelectron spectroscopy confirm the quality of the samples, and the optical transmission measurement demonstrates that the 3DOM silicon film has a bandgap in the near infrared regime. Such a material has the potential to make 3DOM silicon feasible for electrical and optical applications.
通过电沉积法，使用溶解有 SiCl4 的离子液体 1-丁基-1-甲基吡咯烷双（三氟甲磺酰基）酰胺 ([Py(1,4)]Tf2N) 作为电解质，在室温 (~20°C) 下可以实现多孔硅的电沉积，从而制备出具有三维有序大孔 (3DOM) 的硅膜。采用不同直径的自组装 PS 胶体晶体作为模板。扫描电子显微镜和 X 射线光电子能谱证实了样品的质量，而光学透射测量则表明 3DOM 硅膜在近红外区域具有带隙。这种材料有可能使 3DOM 硅在电气和光学应用中变得可行。
