Cover Image

Scaling of characteristic frequencies of organic electronic ratchets

The scaling of the characteristic frequencies of electronic ratchets operating in a flashing mode is investigated by measurements and numerical simulations. The ratchets are based on organic field effect transistors operated in accumulation mode. Oscillating potentials applied to asymmetrically spac...

Full description

Saved in:
Bibliographic Details
Main Authors: Roeling, Erik M. (Author) , Germs, Wijnand Chr. (Author) , Smalbrugge, Barry (Author) , Geluk, Erik Jan (Author) , Vries, Tjibbe de (Author) , Janssen, René A. J. (Author) , Kemerink, Martijn (Author)
Format: Article (Journal)
Language:English
Published: 19 January 2012
In: Physical review. B, Condensed matter and materials physics
Year: 2012, Volume: 85, Issue: 4
ISSN:1550-235X
DOI:10.1103/PhysRevB.85.045430
Online Access:Verlag, Volltext: https://doi.org/10.1103/PhysRevB.85.045430
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.85.045430
Get full text
Author Notes:Erik M. Roeling, Wijnand Chr. Germs, Barry Smalbrugge, Erik Jan Geluk, Tjibbe de Vries, René A.J. Janssen, and Martijn Kemerink
Description
Summary:The scaling of the characteristic frequencies of electronic ratchets operating in a flashing mode is investigated by measurements and numerical simulations. The ratchets are based on organic field effect transistors operated in accumulation mode. Oscillating potentials applied to asymmetrically spaced interdigitated finger electrodes embedded in the gate dielectric create a time-dependent, spatially asymmetric perturbation of the transistor channel potential. As a result, a net dc current can flow between source and drain despite zero source-drain bias. The frequency at current maximum is linearly dependent on the charge carrier density and the charge carrier mobility and inversely proportional to the squared length of the ratchet period, which can be related to the RC time of one asymmetric unit. Counterintuitively, it is independent of driving amplitude. Furthermore, the frequency at current maximum depends on the asymmetry of the ratchet potential, whereas the frequency of maximum charge pumping efficiency does not.
Item Description:Gesehen am 09.12.2019
Physical Description:Online Resource
ISSN:1550-235X
DOI:10.1103/PhysRevB.85.045430

Similar Items