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Light-responsive organic flashing electron ratchet
- Source :
- Proceedings of the National Academy of Sciences. 114:8698-8703
- Publication Year :
- 2017
- Publisher :
- Proceedings of the National Academy of Sciences, 2017.
-
Abstract
- Ratchets are nonequilibrium devices that produce directional motion of particles from nondirectional forces without using a bias, and are responsible for many types of biological transport, which occur with high yield despite strongly damped and noisy environments. Ratchets operate by breaking time-reversal and spatial symmetries in the direction of transport through application of a time-dependent potential with repeating, asymmetric features. This work demonstrates the ratcheting of electrons within a highly scattering organic bulk-heterojunction layer, and within a device architecture that enables the application of arbitrarily shaped oscillating electric potentials. Light is used to modulate the carrier density, which modifies the current with a nonmonotonic response predicted by theory. This system is driven with a single unbiased sine wave source, enabling the future use of natural oscillation sources such as electromagnetic radiation.
- Subjects :
- Physics
Multidisciplinary
Scattering
Oscillation
business.industry
Ratchet
Electrical engineering
02 engineering and technology
Electron
Mechanics
021001 nanoscience & nanotechnology
Flashing
01 natural sciences
Electromagnetic radiation
Organic semiconductor
Sine wave
Physical Sciences
0103 physical sciences
010306 general physics
0210 nano-technology
business
Subjects
Details
- ISSN :
- 10916490 and 00278424
- Volume :
- 114
- Database :
- OpenAIRE
- Journal :
- Proceedings of the National Academy of Sciences
- Accession number :
- edsair.doi.dedup.....23dcf5f2ca057bae147a666ed7b33e95