Anthracene-Based Organic Field-Effect Transistor: Temperature Dependence of the Current-Voltage Characteristics

Nicolet, A. A. L.; Hofmann, Clemens; Kol'chenko, M. A.; Orrit, Michel

doi:10.1080/15421400802462748

Cited by 7 publications

(7 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our experimental conditions, conduction is believed to arise mainly from holes injected via the metallic electrodes. 27 These positive charge carriers will tend to tunnel towards the negatively charged gate electrode and be trapped there. This intuitive idea is confirmed by the absence of slow relaxation when charges are injected directly from metal electrodes into the molecular crystal, without a strong gate bias field.…”

Section: Discussionmentioning

confidence: 99%

“…1), which consisted of a Si wafer highly p-doped with boron, with interdigitated gold electrodes (40 nm thick, 30 electrodes with 29 gaps of 5 mm) on top of it. 27 For incidental reasons, some measurements, called in the following 'contact-Stark', were performed on slightly different substrates with electrodes consisting of a few hundred nanometer thick layer of Al (instead of Au) deposited on a glass surface, with a 60 mm gap between them.…”

Section: Methodsmentioning

confidence: 99%

“…26 This will not only allow us to establish a current by applying a source-drain voltage, but also to vary the charge carrier density and distribution in the crystal by applying a gate voltage across the gate insulator. A former study of such a device has shown that the mobility becomes temperature-independent below 10 K, 27 an indication of the tunneling nature of conduction in the low-temperature regime.…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Nanoscale probing of charge transport in an organic field-effect transistor at cryogenic temperatures

Nicolet

Kol'chenko

Hofmann

et al. 2013

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

We studied charge transport in a field-effect transistor based on an anthracene crystal by single-molecule spectroscopy at cryogenic temperatures. When applying a control voltage to the gate, source and drain electrodes, we observe spectral drifts of the probe molecules' lines, which follow strongly non-exponential (stretched) kinetics, from seconds to tens of minutes. Applying a gate voltage alone, we find a dependence of the spectral shift as the logarithm of time. When an additional source-drain voltage is applied, the spectral shift follows a power law of time, similar to the elementary step of conduction in amorphous solids, postulated in the continuous-time random walk theory of Scher and Montroll.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Nanoscale probing of charge transport in an organic field-effect transistor at cryogenic temperatures

Nicolet

Kol'chenko

Hofmann

et al. 2013

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is qualitatively the same temperature dependence as seen for electron and hole mobilities near room temperature in real experiments on anthracene single crystals. 25,26 Note that the values of the decorrelation rate used here appear to be reasonable because intermolecular motion is expected to take place on a scale of at least 100 fs, 1 which suggests that c should be in the order of around 0.01 fs −1 . Qualitatively similar results are obtained when using longer simulation times (50 fs) and larger values of c in the order of 1 fs −1 (which helps to facilitate long-time calculations).…”

Section: Stochastic Tight-binding Modelmentioning

confidence: 97%

Charge transport in organic crystals: Critical role of correlated fluctuations unveiled by analysis of Feynman diagrams

Packwood

Oniwa

Jin

et al. 2015

The Journal of Chemical Physics

View full text Add to dashboard Cite

Organic crystals have unique charge transport properties that lie somewhere between delocalised band-type transport and localised hopping transport. In this paper, we use a stochastic tight-binding model to explore how dynamical disorder in organic crystals affects charge transport. By analysing the model in terms of Feynman diagrams (virtual processes), we expose the crucial role of correlated dynamical disorder to the charge transport dynamics in the model at short times in the order of a few hundred femtoseconds. Under correlated dynamical disorder, the random motions of molecules in the crystal allow for low-energy "bonding"-type interactions between neighboring molecular orbitals can persist over long periods of time. On the other hand, the dependence of charge transport on correlated dynamical disorder also tends to localize the charge, as correlated disorder cannot persist far in space. This concept of correlation may be the "missing link" for describing the intermediate regime between band transport and hopping transport that occurs in organic crystals.

show abstract

“…Considering single molecule studies in complex device structures like organic light emitting diodes 11 or organic field effect transistors 12, 13, the application of crystalline organic matrices is often very limited in terms of device fabrication and processing. This results from issues concerning sample growth 14, thin film homogeneity 15 and preparation of metallic contacts by thermal evaporation 16, 17.…”

Section: Introductionmentioning

confidence: 99%

The role of oxygen‐induced processes on the emission characteristics of single molecule emitters

Nothaft

Höhla

Jelezko

et al. 2012

Physica Status Solidi (b)

View full text Add to dashboard Cite

Single molecule studies are limited to a defined class of organic dye molecules inserted into respective host materials. Basic requirements for suited material combinations include high photon emission rates and long term photostability. A majority of known aromatic host-guest systems employ crystalline organic matrices to prevent dye molecules from uncontrolled reactions with contaminants. However, in terms of device fabrication and technological potentials it is often desirable to use polymers as room temperature host matrices. Unfortunately, single dye molecule investigations in polymers at room temperature usually report orders of magnitude lower photostabilities compared to their crystalline molecular counterparts, leading to a reduced interest in organic thin film applications. In this report, we exemplary demonstrate the feasibility of engineering a host-guest system based on dibenzoterrylene dye molecules which were diluted into the polymer poly-( p-phenylene-vinylene) (PPV) possessing very low photobleaching probabilities at room temperature. By controlling the oxygen exposure during manufacturing the number of emitted photons prior to photobleaching was significantly increased from 10 6 up to 10 11 photons. Employing suited encapsulation techniques to prevent oxygen penetration after host-guest preparation, photostable devices over prolonged time periods on the order of months to years could be achieved. Therefore, this approach grants access to a variety of new polymer based combinations of host-guest systems for studying single molecular quantum emitters inside organic electronic devices and nanostructured polymer films with sufficient count rates and long-term stability at room temperature.

show abstract

Anthracene-Based Organic Field-Effect Transistor: Temperature Dependence of the Current-Voltage Characteristics

Cited by 7 publications

References 39 publications

Nanoscale probing of charge transport in an organic field-effect transistor at cryogenic temperatures

Nanoscale probing of charge transport in an organic field-effect transistor at cryogenic temperatures

Charge transport in organic crystals: Critical role of correlated fluctuations unveiled by analysis of Feynman diagrams

The role of oxygen‐induced processes on the emission characteristics of single molecule emitters

Contact Info

Product

Resources

About