title: Flexible Lamination-Fabricated Ultra-High Frequency Diodes Based on Self-Supporting Semiconducting Composite Film of Silicon Micro-Particles and Nano-Fibrillated Cellulose.
abstract: Low cost and flexible devices such as wearable electronics, e-labels and distributed sensors will make the future "internet of things" viable. To power and communicate with such systems, high frequency rectifiers are crucial components. We present a simple method to manufacture flexible diodes, operating at GHz frequencies, based on self-adhesive composite films of silicon micro-particles (Si-μPs) and glycerol dispersed in nanofibrillated cellulose (NFC). NFC, Si-μPs and glycerol are mixed in a water suspension, forming a self-supporting nanocellulose-silicon composite film after drying. This film is cut and laminated between a flexible pre-patterned Al bottom electrode and a conductive Ni-coated carbon tape top contact. A Schottky junction is established between the Al electrode and the Si-μPs. The resulting flexible diodes show current levels on the order of mA for an area of 2 mm(2), a current rectification ratio up to 4 × 10(3) between 1 and 2 V bias and a cut-off frequency of 1.8 GHz. Energy harvesting experiments have been demonstrated using resistors as the load at 900 MHz and 1.8 GHz. The diode stack can be delaminated away from the Al electrode and then later on be transferred and reconfigured to another substrate. This provides us with reconfigurable GHz-operating diode circuits.
authors.affiliation: Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden.
authors.forename: Negar
authors.initials: N
authors.lastname: Sani
authors.affiliation: Printed Electronics, Acreo Swedish ICT AB, Box 787, SE-601 17 Norrköping, Sweden.
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.affiliation: INNVENTIA AB, Box 5604, SE-114 86 Stockholm, Sweden.
authors.forename: Hjalmar
authors.initials: H
authors.lastname: Granberg
authors.affiliation: Printed Electronics, Acreo Swedish ICT AB, Box 787, SE-601 17 Norrköping, Sweden.
authors.forename: Peter
authors.initials: P
authors.lastname: Andersson Ersman
authors.affiliation: Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden.
authors.forename: Xavier
authors.initials: X
authors.lastname: Crispin
authors.affiliation: Printed Electronics, Acreo Swedish ICT AB, Box 787, SE-601 17 Norrköping, Sweden.
authors.forename: Peter
authors.initials: P
authors.lastname: Dyreklev
authors.affiliation: Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden.
authors.forename: Isak
authors.initials: I
authors.lastname: Engquist
authors.affiliation: Printed Electronics, Acreo Swedish ICT AB, Box 787, SE-601 17 Norrköping, Sweden.
authors.forename: Göran
authors.initials: G
authors.lastname: Gustafsson
authors.affiliation: Department of Science and Technology, Linköping University, SE-601 74 Norrköping, Sweden.
authors.forename: Magnus
authors.initials: M
authors.lastname: Berggren
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D057139:Nanofibers / Q000737:chemistry*; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry*; D000076251:Wearable Electronic Devices
chemical_list: D002482:Cellulose; D012825:Silicon