Van der Waals MoS 2 /VO 2 heterostructure junction with tunable rectifier behavior and efficient photoresponse
Junctions between n-type semiconductors of different electron affinity show rectification if the junction is abrupt enough. With the advent of 2D materials, we are able to realize thin van der Waals (vdW) heterostructures based on a large diversity of materials. In parallel, strongly correlated func...
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Published in | Scientific reports Vol. 7; no. 1; p. 14250 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
27.10.2017
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Online Access | Get full text |
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Abstract | Junctions between n-type semiconductors of different electron affinity show rectification if the junction is abrupt enough. With the advent of 2D materials, we are able to realize thin van der Waals (vdW) heterostructures based on a large diversity of materials. In parallel, strongly correlated functional oxides have emerged, having the ability to show reversible insulator-to-metal (IMT) phase transition by collapsing their electronic bandgap under a certain external stimulus. Here, we report for the first time the electronic and optoelectronic characterization of ultra-thin n-n heterojunctions fabricated using deterministic assembly of multilayer molybdenum disulphide (MoS
) on a phase transition material, vanadium dioxide (VO
). The vdW MoS
/VO
heterojunction combines the excellent blocking capability of an n-n junction with a high conductivity in on-state, and it can be turned into a Schottky rectifier at high applied voltage or at temperatures higher than 68 °C, exploiting the metal state of VO
. We report tunable diode-like current rectification with a good diode ideality factor of 1.75 and excellent conductance swing of 120 mV/dec. Finally, we demonstrate unique tunable photosensitivity and excellent junction photoresponse in the 500/650 nm wavelength range. |
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AbstractList | Junctions between n-type semiconductors of different electron affinity show rectification if the junction is abrupt enough. With the advent of 2D materials, we are able to realize thin van der Waals (vdW) heterostructures based on a large diversity of materials. In parallel, strongly correlated functional oxides have emerged, having the ability to show reversible insulator-to-metal (IMT) phase transition by collapsing their electronic bandgap under a certain external stimulus. Here, we report for the first time the electronic and optoelectronic characterization of ultra-thin n-n heterojunctions fabricated using deterministic assembly of multilayer molybdenum disulphide (MoS
) on a phase transition material, vanadium dioxide (VO
). The vdW MoS
/VO
heterojunction combines the excellent blocking capability of an n-n junction with a high conductivity in on-state, and it can be turned into a Schottky rectifier at high applied voltage or at temperatures higher than 68 °C, exploiting the metal state of VO
. We report tunable diode-like current rectification with a good diode ideality factor of 1.75 and excellent conductance swing of 120 mV/dec. Finally, we demonstrate unique tunable photosensitivity and excellent junction photoresponse in the 500/650 nm wavelength range. |
Author | Schueler, Andreas Rosca, Teodor Casu, Emanuele Andrea Oliva, Nicoló Krammer, Anna Magrez, Arnaud Yan, Chen Stolichnov, Igor Ionescu, Adrian Mihai Martin, Olivier J F |
Author_xml | – sequence: 1 givenname: Nicoló surname: Oliva fullname: Oliva, Nicoló email: nicolo.oliva@epfl.ch organization: Nanoelectronic Devices Laboratory (NanoLab), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland. nicolo.oliva@epfl.ch – sequence: 2 givenname: Emanuele Andrea surname: Casu fullname: Casu, Emanuele Andrea organization: Nanoelectronic Devices Laboratory (NanoLab), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland – sequence: 3 givenname: Chen orcidid: 0000-0002-3171-0449 surname: Yan fullname: Yan, Chen organization: Nanophotonics and Metrology Laboratory (NAM), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland – sequence: 4 givenname: Anna surname: Krammer fullname: Krammer, Anna organization: Solar Energy and Building Physics Laboratory (LESO-PB), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland – sequence: 5 givenname: Teodor surname: Rosca fullname: Rosca, Teodor organization: Nanoelectronic Devices Laboratory (NanoLab), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland – sequence: 6 givenname: Arnaud surname: Magrez fullname: Magrez, Arnaud organization: Istitut de Physique (IPHYS), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland – sequence: 7 givenname: Igor surname: Stolichnov fullname: Stolichnov, Igor organization: Nanoelectronic Devices Laboratory (NanoLab), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland – sequence: 8 givenname: Andreas surname: Schueler fullname: Schueler, Andreas organization: Solar Energy and Building Physics Laboratory (LESO-PB), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland – sequence: 9 givenname: Olivier J F orcidid: 0000-0002-9574-3119 surname: Martin fullname: Martin, Olivier J F organization: Nanophotonics and Metrology Laboratory (NAM), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland – sequence: 10 givenname: Adrian Mihai surname: Ionescu fullname: Ionescu, Adrian Mihai organization: Nanoelectronic Devices Laboratory (NanoLab), École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland |
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Title | Van der Waals MoS 2 /VO 2 heterostructure junction with tunable rectifier behavior and efficient photoresponse |
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