title: Bendable Photodetector on Fibers Wrapped with Flexible Ultrathin Single Crystalline Silicon Nanomembranes.
abstract: Silicon (Si) nanomembranes (NMs) enable conformal covering on complicated surfaces for novel applications. We adopt classical fibers as flexible/curved substrates and wrap them with freestanding ultrathin Si-NMs with a thickness of ∼20 nm. Intrinsic defects in single-crystalline Si-NMs provide a flow path for hydrofluoric acid (HF) to release the NM with a consecutive area of ∼0.25 cm2. Such Si-NMs with ultralow flexural rigidities are transferred onto a single-mode fiber (SMF) and functionalized into bendable photodetectors, which detects the leaked light when the fiber is bent. Our demonstration exemplifies optoelectronic applications in flexible photodetector for Si-NMs in a three-dimensional (3D) geometry.
authors.affiliation: Department of Materials Science, Fudan University , 220 Handan Road, Shanghai 200433, China.
authors.forename: Enming
authors.identifier: http://orcid.org/0000-0002-2658-904X
authors.initials: E
authors.lastname: Song
authors.affiliation: Department of Materials Science, Fudan University , 220 Handan Road, Shanghai 200433, China.
authors.forename: Qinglei
authors.initials: Q
authors.lastname: Guo
authors.affiliation: Department of Materials Science, Fudan University , 220 Handan Road, Shanghai 200433, China.
authors.forename: Gaoshan
authors.initials: G
authors.lastname: Huang
authors.affiliation: Department of Materials Science, Fudan University , 220 Handan Road, Shanghai 200433, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Jia
authors.affiliation: Department of Materials Science, Fudan University , 220 Handan Road, Shanghai 200433, China.
authors.forename: Yongfeng
authors.identifier: http://orcid.org/0000-0002-3314-6108
authors.initials: Y
authors.lastname: Mei
keywords: Schottky barrier; optical fiber; photodetector; transfer technology; ultrathin silicon nanomembrane