title: A nanomesh scaffold for supramolecular nanowire optoelectronic devices.
abstract: Supramolecular organic nanowires are ideal nanostructures for optoelectronics because they exhibit both efficient exciton generation as a result of their high absorption coefficient and remarkable light sensitivity due to the low number of grain boundaries and high surface-to-volume ratio. To harvest photocurrent directly from supramolecular nanowires it is necessary to wire them up with nanoelectrodes that possess different work functions. However, devising strategies that can connect multiple nanowires at the same time has been challenging. Here, we report a general approach to simultaneously integrate hundreds of supramolecular nanowires of N,N'-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C8) in a hexagonal nanomesh scaffold with asymmetric nanoelectrodes. Optimized PTCDI-C8 nanowire photovoltaic devices exhibit a signal-to-noise ratio approaching 107, a photoresponse time as fast as 10 ns and an external quantum efficiency >55%. This nanomesh scaffold can also be used to investigate the fundamental mechanism of photoelectrical conversion in other low-dimensional semiconducting nanostructures.
authors.affiliation: ISIS &icFRC, University of Strasbourg &CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: ISIS &icFRC, University of Strasbourg &CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France.
authors.forename: Xiaolan
authors.initials: X
authors.lastname: Zhong
authors.affiliation: Laboratory for Organic Matter Physics, University of Nova Gorica, Vipavska 13, SI-5000 Nova Gorica, Slovenia.
authors.forename: Egon
authors.initials: E
authors.lastname: Pavlica
authors.affiliation: ISIS &icFRC, University of Strasbourg &CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France.
authors.forename: Songlin
authors.identifier: 0000-0002-3995-9580
authors.initials: S
authors.lastname: Li
authors.affiliation: ISIS &icFRC, University of Strasbourg &CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France.
authors.forename: Alexander
authors.initials: A
authors.lastname: Klekachev
authors.affiliation: Laboratory for Organic Matter Physics, University of Nova Gorica, Vipavska 13, SI-5000 Nova Gorica, Slovenia.
authors.forename: Gvido
authors.initials: G
authors.lastname: Bratina
authors.affiliation: ISIS &icFRC, University of Strasbourg &CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France.
authors.forename: Thomas W
authors.initials: TW
authors.lastname: Ebbesen
authors.affiliation: ISIS &icFRC, University of Strasbourg &CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France.
authors.forename: Emanuele
authors.initials: E
authors.lastname: Orgiu
authors.affiliation: ISIS &icFRC, University of Strasbourg &CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France.
authors.forename: Paolo
authors.initials: P
authors.lastname: Samorì