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Title: Light-responsive organic flashing electron ratchet

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 paper 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. Finally, this system is driven with a single unbiased sine wave source, enabling the future use of natural oscillation sources such as electromagnetic radiation.

Authors:
; ; ;
Publication Date:
Research Org.:
Northwestern Univ., Evanston, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Energy Science (CBES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1373423
Alternate Identifier(s):
OSTI ID: 1465966
Grant/Contract Number:  
SC0000989; DMR-1121262; NNCI-1542205
Resource Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 114 Journal Issue: 33; Journal ID: ISSN 0027-8424
Publisher:
Proceedings of the National Academy of Sciences
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; ratchet; nonequilibrium; charge transport; organic semiconductor

Citation Formats

Kedem, Ofer, Lau, Bryan, Ratner, Mark A., and Weiss, Emily A. Light-responsive organic flashing electron ratchet. United States: N. p., 2017. Web. doi:10.1073/pnas.1705973114.
Kedem, Ofer, Lau, Bryan, Ratner, Mark A., & Weiss, Emily A. Light-responsive organic flashing electron ratchet. United States. doi:10.1073/pnas.1705973114.
Kedem, Ofer, Lau, Bryan, Ratner, Mark A., and Weiss, Emily A. Mon . "Light-responsive organic flashing electron ratchet". United States. doi:10.1073/pnas.1705973114.
@article{osti_1373423,
title = {Light-responsive organic flashing electron ratchet},
author = {Kedem, Ofer and Lau, Bryan and Ratner, Mark A. and Weiss, Emily A.},
abstractNote = {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 paper 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. Finally, this system is driven with a single unbiased sine wave source, enabling the future use of natural oscillation sources such as electromagnetic radiation.},
doi = {10.1073/pnas.1705973114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 33,
volume = 114,
place = {United States},
year = {2017},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1073/pnas.1705973114

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Cited by: 3 works
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