Ternary‐Responsive Field‐Effect Transistors and Multilevel Memories Based on Asymmetrically Functionalized Janus Few‐Layer WSe2

Advanced Functional Materials, vol. 31

Abstract

Abstract Hybrids composed of 2D transition metal dichalcogenides with stimuli‐responsive molecules are prototypical components for the development of multifunctional field‐effect transistors (FETs), whose output currents can be remotely controlled by external inputs. Herein, ternary‐responsive FETs based on a few‐layer WSe2 are realized by decorating the two opposite surfaces of the 2D semiconductor with different stimuli‐responsive molecules in an asymmetric fashion: the bottom surface is interfaced with a photochromic diarylethene film and the top surface with a ferroelectric poly(vinylidene fluoride–trifluoroethylene) layer. This novel Janus ternary device architecture shows superior functional complexity compared with normal mono‐stimuli‐responsive FETs. The synergy between the two molecularly induced effects enables the devices to respond orthogonally to an electric field and light irradiation, with an enhanced output current modulation efficiency of 87%. The 9 ferroelectric and 84 photo‐generated states ensure 756 current levels in a single device. The over 10 cycles of cyclic endurance and more than 1000 h of retention time confirm the reliability of each state, implementing the demand for high‐density non‐volatile memories, as well as enriching the diversification in “More than Moore” technologies.

Authors 4

1. Haixin Qiu

   Centre National de la Recherche Scientifique · Institut de Science et d'Ingénierie Supramoléculaires · Université de Strasbourg

   Affiliation as printed

   University of Strasbourg CNRS, ISIS UMR 7006 8 Allée Gaspard Monge Strasbourg F‐67000 France

2. Martin Herder

   Humboldt-Universität zu Berlin

   Affiliation as printed

   Department of Chemistry and IRIS Adlershof Humboldt‐Universität zu Berlin 12489 Berlin Germany

3. Stefan Hecht Aachen Institute of Technical and Macromolecular Chemistry

   Humboldt-Universität zu Berlin · DWI – Leibniz Institute for Interactive Materials · RWTH Aachen University

   Affiliation as printed

   DWI–Leibniz Institute for Interactive Materials Forckenbeckstr. 50 52074 Aachen Germany

   Department of Chemistry and IRIS Adlershof Humboldt‐Universität zu Berlin 12489 Berlin Germany

   Institute of Technical and Macromolecular Chemistry RWTH Aachen University Worringer Weg 2 52074 Aachen Germany

   Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringer Weg 2, 52074 Aachen, Germany

4. Paolo Samorı́ corresponding

   Centre National de la Recherche Scientifique · Institut de Science et d'Ingénierie Supramoléculaires · Université de Strasbourg

   Affiliation as printed

   University of Strasbourg CNRS, ISIS UMR 7006 8 Allée Gaspard Monge Strasbourg F‐67000 France