Triplet excitation and electroluminescence from a supramolecular monolayer embedded in a boron nitride tunnel barrier
dc.contributor.author | Beton, Peter | |
dc.contributor.other | Kerfoot, James | |
dc.contributor.other | Nizovtsev, Anton S. | |
dc.contributor.other | Summerfield, Alex | |
dc.contributor.other | Korolkov, Vladimir V. | |
dc.contributor.other | Taniguchi, Takashi | |
dc.contributor.other | Watanabe, Kenji | |
dc.contributor.other | Antolín, Elisa | |
dc.contributor.other | Besley, Elena | |
dc.date.accessioned | 2020-01-07T14:41:30Z | |
dc.date.available | 2020-01-07T14:41:30Z | |
dc.date.issued | 2019-12-10 | |
dc.identifier.uri | https://rdmc.nottingham.ac.uk/handle/internal/7028 | |
dc.description.abstract | We show that ordered monolayers of organic molecules stabilized by hydrogen bonding on the surface of exfoliated few-layer hexagonal boron nitride (hBN) flakes may be incorporated into van der Waals heterostructures with integral few-layer graphene contacts forming a molecular/2D hybrid tunneling diode. Electrons can tunnel from through the hBN/molecular barrier under an applied voltage VSD and we observe molecular electroluminescence from an excited singlet state with an emitted photon energy > eVSD, indicating up-conversion by energies up to ~ 1 eV. We show that tunnelling electrons excite embedded molecules into singlet states in a two-step process via an intermediate triplet state through inelastic scattering and also observe direct emission from the triplet state. These heterostructures provide a solid-state device in which spin-triplet states, which cannot be generated by optical transitions, can be controllably excited and provide a new route to investigate the physics, chemistry and quantum spin-based applications of triplet generation, emission and molecular photon up-conversion. | en_UK |
dc.language.iso | en | en_UK |
dc.publisher | The University of Nottingham | en_UK |
dc.rights | CC-BY | * |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | * |
dc.source | arXiv:1909.08488 | en_UK |
dc.subject.lcsh | Monomolecular films | en_UK |
dc.subject.lcsh | Heterostructures | en_UK |
dc.subject.lcsh | Tunnel diodes | en_UK |
dc.title | Triplet excitation and electroluminescence from a supramolecular monolayer embedded in a boron nitride tunnel barrier | en_UK |
dc.identifier.doi | http://doi.org/10.17639/nott.7020 | |
dc.subject.free | Electroluminescence, Van der Waas Heterostructure, Up-conversion, Molecular Self-Assembly | en_UK |
dc.subject.jacs | Physical sciences | en_UK |
dc.subject.lc | Q Science::QD Chemistry::QD450 Physical and theoretical chemistry | en_UK |
dc.subject.lc | T Technology::TK Electrical engineering. Electronics Nuclear engineering::TK7800 Electronics | en_UK |
dc.subject.lc | Q Science::QC Physics::QC501 Electricity and magnetism | en_UK |
dc.date.collection | 01.02.2019 - 01.07.2019 | en_UK |
uon.division | University of Nottingham, UK Campus::Faculty of Science::School of Physics and Astronomy | en_UK |
uon.funder.controlled | Engineering & Physical Sciences Research Council | en_UK |
uon.datatype | Raw data files: AFM images (.ibw), photoluminescence and electroluminescence spectra (.ls6 and .txt), current vs. voltage measurement files (.txt), optical microscopy images (.jpg) | en_UK |
uon.funder.free | Leverhulme Trust | en_UK |
uon.funder.free | MEXT | en_UK |
uon.grant | EP/N033906/1 | en_UK |
uon.grant | RPG-2016-104 | en_UK |
uon.grant | JPMJCR15F3 | en_UK |
uon.grant | EP/P020232/1 | en_UK |
uon.collectionmethod | Optical microscopy, Fluorescence microscopy, Atomic force microscopy, probe station current-voltage measurements | en_UK |
uon.preservation.rarelyaccessed | true |
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