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

Author(s)

Nawaz, Ali ^[1] ; Merces, Leandro ^[1] ; de Andrade, Denise M. ^{[1, 2]} ; de Camargo, Davi H. S. ^{[1, 3]} ; Bof Bufon, Carlos C. ^{[1, 3]}

Affiliation

^[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil

^[2] Ponta Grossa State Univ UEPG, Dept Mat Engn, BR-84030900 Ponta Grossa, Parana - Brazil

^[3] Sao Paulo State Univ UNESP, Postgrad Program Mat Sci & Technol POSMAT, BR-17033360 Bauru, SP - Brazil

• Document type: Journal article
• Source: NATURE COMMUNICATIONS; v. 11, n. 1 FEB 12 2020.
• Web of Science Citations: 14

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 (similar to 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 (similar to 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. (AU)

• FAPESP's process: 18/18136-0 - Hybrid nanodevices: magnetoelectronic transport and development of sensors based on molecules/nanomembranes
• Grantee: Leandro das Mercês Silva
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 14/50906-9 - INCT 2014: in Functional Complex Materials
• Grantee: Fernando Galembeck
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 16/25346-5 - Capacitive devices for hybrid nanostructures characterization: study of electrical properties of surface metal-organic frameworks -SURMOFs- and metallophthalocyanines
• Grantee: Tatiana Parra Vello
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/25979-2 - Fabrication and characterization of devices and systems based on hybrid nanomembranes
• Grantee: Carlos Cesar Bof Bufon
• Support type: Research Grants - Young Investigators Grants