Edge-driven nanomembrane-based vertical organic transistors showing a multi-sensing capability

Abstract

The effective utilization of vertical organic transistors in high current density applications demands further reduction of channel length (given by the thickness of the organic semiconducting layer and typically reported in the 100 nm range) along with the optimization of the source electrode structure. Here we present a viable solution by applying rolled-up metallic nanomembranes as the drain-electrode (which enables the incorporation of few nanometer-thick semiconductor layers) and by lithographically patterning the source-electrode. Our vertical organic transistors operate at ultra-low voltages and demonstrate high current densities (~0.5 A cm−2) that are found to depend directly on the number of source edges, provided the source perforation gap is wider than 250 nm. We anticipate that further optimization of device structure can yield higher current densities (~10 A cm−2). The use of rolled-up drain-electrode also enables sensing of humidity and light which highlights the potential of these devices to advance next-generation sensing technologies.

Reorganization Energy upon Controlled Intermolecular Charge‐Transfer Reactions in Monolithically Integrated Nanodevices

“…[32,33] Such an approach avoids electrical shortcircuits usually caused by top-electrode evaporation, whereas the mechanically soft top-contact preserves the moleculesintegrity and function. [34][35][36] Additionally, nCap monolithic integration spares the use of either liquid metal electrodes or scanning probe tips, allowing reliable fabrication of real-life molecular devices that can be operated in different electromagnetic fields, temperatures, pressures, among other external conditions. [37][38][39] In the literature, one may find exciting examples of using the nanomembrane-origami technology to fabricate various monolithically-integrated devices featuring organic/ inorganic hybrid functions.…”

High‐Performance Ultrathin Molecular Rectifying Diodes Based on Organic/Inorganic Interface Engineering

“…traditional inorganic electronic components -or even replace them -comes from the possibility of creating systems that display a high degree of sophistication. [4][5][6] Flexible devices processed by low-temperature routes and reduced production costs are some to mention a few. [7] As organic materials and devices reach the nanoscale, organic/inorganic interfaces become a fundamental counterpart, being responsible for several functionalities.…”

Ultrahigh‐Gain Organic Electrochemical Transistor Chemosensors Based on Self‐Curled Nanomembranes

“…[ 25 ] Such features are severely impacted by the surface–volume ratio displayed by the corresponding analytical environment—a scenario in which self‐curled nanomembranes (NMs) have successfully shown the remarkable capability of improving electrochemical energy conversion and storage within shrunk device components. [ 26,27 ] As nanometer‐thick, freestanding, bendable, and twistable structures, [ 28 ] which can be strain‐engineered to form microcylindrical cavities, [ 29 ] the NMs offer plenty of room for mass‐transport‐driven lab‐on‐a‐chip integration. [ 30 ] The self‐curling can be controlled very well by standard semiconductor processing techniques, whereas the tubular geometry, winding angle, the number of consecutive windings, and coil diameter can be adjusted precisely to provide specific device functionality.…”