Cited 62 time in webofscience Cited 69 time in scopus

Transport Properties of a Single-Molecule Diode

Title
Transport Properties of a Single-Molecule Diode
Authors
Lortscher, E[Loertscher, Emanuel]Gotsmann, B[Gotsmann, Bernd]Lee, Y[Lee, Youngu]Yu, LP[Yu, Luping]Rettner, C[Rettner, Charles]Riel, H[Riel, Heike]
DGIST Authors
Lee, Y[Lee, Youngu]
Issue Date
2012-06
Citation
ACS Nano, 6(6), 4931-4939
Type
Article
Article Type
Article
Keywords
Applied BiasBias VoltageBiphenylBiphenyl CompoundsBiphenyl DerivativeChemical ModelChemistryComputer-Aided DesignComputer SimulationConductance HistogramsCurrent Voltage CharacteristicsDiblocksDonor and AcceptorElectric ConductivityElectric RectifiersElectron TransportEquipmentEquipment DesignEquipment Failure AnalysisInstrumentationLevel-ShiftingMaterials TestingMechanically Controllable Break-JunctionModels, ChemicalMolecular ElectronicsMolecular Energy LevelsMolecular JunctionMoleculesNanoparticleNanoparticlesNanotechnologyNon-SymmetricRectificationSemiconductorSemiconductorsSemiempirical ModelsSingle-MoleculeSingle-Molecule TransportTemperature RangeTransport PropertiesUltrastructureVariable CouplingVoltage Drop
ISSN
1936-0851
Abstract
Charge transport through single diblock dipyrimidinyl diphenyl molecules consisting of a donor and acceptor moiety was measured in the low-bias regime and as a function of bias at different temperatures using the mechanically controllable break-junction technique. Conductance histograms acquired at 10 mV reveal two distinct peaks, separated by a factor of 1.5, representing the two orientations of the single molecule with respect to the applied bias. The current-voltage characteristics exhibit a temperature-independent rectification of up to a factor of 10 in the temperature range between 300 and 50 K with single-molecule currents of 45-70 nA at ±1.5 V. The current-voltage characteristics are discussed using a semiempirical model assuming a variable coupling of the molecular energy levels as well as a nonsymmetric voltage drop across the molecular junction, thus shifting the energy levels accordingly. The excellent agreement of the data with the proposed model suggests that the rectification originates from an asymmetric Coulomb blockade in combination with an electric-field-induced level shifting. © 2012 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/2464
DOI
10.1021/nn300438h
Publisher
American Chemical Society
Related Researcher
  • Author Lee, Youn Gu Organic & Printed Electronics Laboratory(OPEL)
  • Research Interests OTF Solar cell; OLED; Printed Electronics; 유기박막형 태양전지; OLED; Printed Electronics
Files:
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Collection:
Energy Science and EngineeringOrganic & Printed Electronics Laboratory(OPEL)1. Journal Articles


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