First demonstration of a CMOS inverter based on transition metal dichalcogenides on a flexible substrate

Agata Piacentini and coworkers in the ORIGENAL project have demonstrated the first CMOS inverter based on transition metal dichalcogenides (TMDC) on a flexible substrate, using two distinct TMDC materials, MoS2 and WSe2.

The team has successfully fabricated NMOS FETs based on CVD-MoS2 and PMOS FETs based on MOCVD-WSe2 on a flexible foil substrate. The FETs exhibited almost mirror-symmetric transfer characteristics, as required for CMOS architecture, large ON-OFF ratio and the proper positioning of the threshold voltage, i.e., a positive voltage for NMOS and a negative voltage for PMOS. The transistors also exhibited excellent mechanical stability, with no degradation observed after 3000 bending cycles.

The CMOS inverter was realized by connecting NMOS and PMOS FETs, and showed excellent switching characteristics, including high gain, high noise margin, and low power consumption.

These results, which have been reported in physica status solidi a, outperform previous TMDC-based inverters and approach the performance of inverters based on metal oxide semiconductors and provide a solid basis for realizing more complex TMDC-based CMOS circuits in the future.

The work is the result of the collaboration between AMO GmbH, RWTH Aachen University, TU Wien, AIXTRON SE, and Bergische Universität Wuppertal, and has been financially supported by the European Commission through the Horizon 2020 Projects Graphene Flagship and ORIGENAL and by the Deutsche Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the project MOSTFLEX.

Bibliographic information:

Flexible Complementary Metal-Oxide-Semiconductor Inverter Based on 2D p-type WSe2 and n-type MoS2
Piacentini, A., Polyushkin, D.K., Uzlu, B., Grundmann, A., Heuken, M., Kalisch, H., Vescan, A., Wang, Z., Lemme, M.C., Mueller, T. and Neumaier, D.   
Phys. Status Solidi A 2300913.

A workshop on “2D Materials for Future Electronics” in Aachen

ORIGENAL’s coordinator, Prof. Daniel Neumaier, is one of the scientific organizers of the two-day workshop on “2D Materials for Future Electronics” that will take place in Aachen on February 19-20, 2024 – with a strong footprint of the ORIGENAL project.

The scope of the workshop is to discuss the opportunities offered by 2D materials for future electronics, as well as the challenges that still need to be solved to turn the scientific advancements of the field into marketable innovations.

The program will cover several facets of the field, including:

  • massive scaling and miniaturization (“2D materials for more Moore”)
  • flexible electronics and sensors (“2D materials for more than Moore”)
  • novel computing paradigms (“2D materials for neuromorphic computing”)

The workshop will also feature a special hybrid session dedicated to electronics based on transition metal dichalcogenide (TMDs) in cooperation with the 2D-Experimental Pilot Line.

Confirmed Speakers:

  • Gianluca Fiori (Università di Pisa)
  • Andras Kis (EPFL)
  • Agata Piacentini (AMO)
  • Karl Magnus Persson (VTT)
  • Dmitry Polyushkin (TU Wien)
  • Frank Schwierz (TU Illmenau)
  • Roman Sordan (Politecnico di Milano)
  • … more to come!

Scientific Organizers: Max Lemme (AMO GmbH & RWTH Aachen University), Daniel Neumaier (University of Wuppertal & AMO GmbH), Zhenxing Wang (AMO GmbH) , Gordon Rinke (AMO GmbH)

The workshop is organized with the financial support of European Union via the projects ORIGENAL, MISEL2D-EPL, and AttoSwitch and of the German BMBF via the project NeuroSys and NEUROTEC.

Registration: The registration to the workshop is free of charges and open until February 10, 2024. Original contributions by the participants in form of a poster are warmly welcome.

More information & registration

Workshop flyer

November Workshop of the Aachen Graphene & 2D Materials Center at SuperC

On November 15-16, 2021, the members of the Aachen Graphene & 2D Materials Center will meet up for an internal workshop, where each group will present and discuss its current research questions and latest results.

The workshop will take place in the conference rooms of the SuperC (one of the most scenic buildings at RWTH Aachen University) under strict 2G+ rules.

ORIGENAL’s coordinator Prof. Daniel Neumeier will present the latest results of his group on ” Stable TMDC encapsulation and flexible logic circuits” (see Workshop Program).

The first operational amplifier based on a two-dimensional material

Researchers from the ORIGENAL project have realized the first operational amplifier based on the two-dimensional semiconductor MoS2, reaching a key milestone towards the vision of a flexible electronics all based on two dimensional materials. This result has just appeared in the journal Nature Electronics.

Continue reading “The first operational amplifier based on a two-dimensional material”

The University of Wuppertal joins the ORIGENAL consortium

The project coordinator of ORIGENAL, Daniel Neumaier, has started in February 2020 as professor at the University of Wuppertal for the Chair of Smart Sensor Systems. Now the University of Wuppertal became a new partner of the ORIGENAL project and will additionally take over the project coordination with effect of August 1st, 2020. Technically, the University of Wuppertal will be involved in WP1 and WP3 and contribute to the development of the flexible logic and folding technology.