Investigations of local currents in a semiconductor by single-molecule spectroscopy

Caruge, Jean-Michel; Orrit, Michel

doi:10.1016/s0022-2313(02)00244-2

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…The Stark effect becomes more complicated if single molecules can be affected by the long-range electrostatic fields from electric charges injected into and trapped in the matrix. [95][96][97][98] The most convenient way to control charge injection and transport is to carry out experiments in a field-effect transistor (FET) configuration, as presented in Fig. 5A.…”

Section: External Field and Injected-charge Effects On Single Moleculesmentioning

confidence: 99%

“…It was surprising to observe that, on applying oscillating (ac-)voltages of a few volts to the source-drain electrodes, the spectral shifts of single-molecule lines resonated at certain frequencies between tens of kHz and some MHz. 95,96,103 Examples of the observed resonance spectra are shown in Fig. 5B.…”

Section: External Field and Injected-charge Effects On Single Moleculesmentioning

confidence: 99%

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Single-molecule photophysics, from cryogenic to ambient conditions

Kozankiewicz

Orrit

2014

Chem. Soc. Rev.

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We review recent progress in characterizing and understanding the photophysics of single molecules in condensed matter, mostly at cryogenic temperatures. We discuss the central role of the triplet state in limiting the number of useful host-guest systems, notably a new channel, intermolecular intersystem crossing. Another important limitation to the use of single molecules is their photo-reactivity, leading to blinking of the fluorescence signal, and eventually to its loss by photo-bleaching. These processes are at the heart of modern super-resolution schemes. We then examine some of the new host-guest systems recently discovered following these general principles, and the mechanisms of spectral diffusion and dephasing that they have revealed. When charges are injected into organic conductors, they get trapped and influence single molecules via the local fields they create in the material, and via their coupling to localized vibrations. Understanding these processes is necessary for better control of spectral diffusion and dephasing of single molecules. We finally conclude by giving some outlook on future directions of this fascinating field.

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Section: External Field and Injected-charge Effects On Single Moleculesmentioning

confidence: 99%

Section: External Field and Injected-charge Effects On Single Moleculesmentioning

confidence: 99%

Single-molecule photophysics, from cryogenic to ambient conditions

Kozankiewicz

Orrit

2014

Chem. Soc. Rev.

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“…It has been shown that the accuracy of single-molecule spectroscopy and microscopy is sufficient for dynamic triangulation with errors as low as 6% of the electron displacement (for displacements on the order of 0.1 nm). The proposed idea can be applied to study photo ionization of quantum dots [10,11], charge transfer in photosynthetic centres [12,13], in conducting polymers [14] and in semiconductors [15,16]. The required signal accumulation times are quite long but at low temperatures the electron transfer can be quite slow.…”

Section: Discussionmentioning

confidence: 99%

Sensing single electrons with single molecules

Plakhotnik

2007

Journal of Luminescence

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“…In (even weakly) conducting materials, however, charges can be injected and travel long distances, thereby modifying profoundly the local field felt by probe molecules. These charge transport phenomena give rise to a rich variety of interaction mechanisms, [18][19][20][21] as the chromophore reacts to the additional local fields created by charges injected and trapped in its environment. Probing charge injection and trapping locally with single molecules may help us understand conduction and trapping in molecular crystals, and more generally in the materials used in organic electronics.…”

Section: Introductionmentioning

confidence: 99%

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.

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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.

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Investigations of local currents in a semiconductor by single-molecule spectroscopy

Cited by 9 publications

References 16 publications

Single-molecule photophysics, from cryogenic to ambient conditions

Single-molecule photophysics, from cryogenic to ambient conditions

Sensing single electrons with single molecules

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

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