title: Three-dimensionally ordered macroporous silicon films made by electrodeposition from an ionic liquid.
abstract: 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.
authors.affiliation: Center for Composite Material, Harbin Institute of Technology, Harbin, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Dengteng
authors.initials: D
authors.lastname: Ge
authors.forename: Jiupeng
authors.initials: J
authors.lastname: Zhao
authors.forename: Yao
authors.initials: Y
authors.lastname: Li
authors.forename: Frank
authors.initials: F
authors.lastname: Endres