Mode-selective vibrational modulation of charge transport in organic electronic devices

Handle URI:
http://hdl.handle.net/10754/575985
Title:
Mode-selective vibrational modulation of charge transport in organic electronic devices
Authors:
Bakulin, Artem A.; Lovrincic, Robert; Yu, Xi; Selig, Oleg; Bakker, Huib J.; Rezus, Yves L. A.; Nayak, Pabitra K.; Fonari, Alexandr; Coropceanu, Veaceslav; Bredas, Jean-Luc ( 0000-0001-7278-4471 ) ; Cahen, David
Abstract:
The soft character of organic materials leads to strong coupling between molecular, nuclear and electronic dynamics. This coupling opens the way to influence charge transport in organic electronic devices by exciting molecular vibrational motions. However, despite encouraging theoretical predictions, experimental realization of such approach has remained elusive. Here we demonstrate experimentally that photoconductivity in a model organic optoelectronic device can be modulated by the selective excitation of molecular vibrations. Using an ultrafast infrared laser source to create a coherent superposition of vibrational motions in a pentacene/C60 photoresistor, we observe that excitation of certain modes in the 1,500–1,700 cm−1 region leads to photocurrent enhancement. Excited vibrations affect predominantly trapped carriers. The effect depends on the nature of the vibration and its mode-specific character can be well described by the vibrational modulation of intermolecular electronic couplings. This presents a new tool for studying electron–phonon coupling and charge dynamics in (bio)molecular materials.
KAUST Department:
Solar and Photovoltaic Engineering Research Center (SPERC)
Citation:
Mode-selective vibrational modulation of charge transport in organic electronic devices 2015, 6:7880 Nature Communications
Publisher:
Nature Publishing Group
Journal:
Nature Communications
Issue Date:
6-Aug-2015
DOI:
10.1038/ncomms8880
Type:
Article
ISSN:
2041-1723
Additional Links:
http://www.nature.com/doifinder/10.1038/ncomms8880
Appears in Collections:
Articles; Solar and Photovoltaic Engineering Research Center (SPERC); Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorBakulin, Artem A.en
dc.contributor.authorLovrincic, Roberten
dc.contributor.authorYu, Xien
dc.contributor.authorSelig, Olegen
dc.contributor.authorBakker, Huib J.en
dc.contributor.authorRezus, Yves L. A.en
dc.contributor.authorNayak, Pabitra K.en
dc.contributor.authorFonari, Alexandren
dc.contributor.authorCoropceanu, Veaceslaven
dc.contributor.authorBredas, Jean-Lucen
dc.contributor.authorCahen, Daviden
dc.date.accessioned2015-08-27T05:49:40Zen
dc.date.available2015-08-27T05:49:40Zen
dc.date.issued2015-08-06en
dc.identifier.citationMode-selective vibrational modulation of charge transport in organic electronic devices 2015, 6:7880 Nature Communicationsen
dc.identifier.issn2041-1723en
dc.identifier.doi10.1038/ncomms8880en
dc.identifier.urihttp://hdl.handle.net/10754/575985en
dc.description.abstractThe soft character of organic materials leads to strong coupling between molecular, nuclear and electronic dynamics. This coupling opens the way to influence charge transport in organic electronic devices by exciting molecular vibrational motions. However, despite encouraging theoretical predictions, experimental realization of such approach has remained elusive. Here we demonstrate experimentally that photoconductivity in a model organic optoelectronic device can be modulated by the selective excitation of molecular vibrations. Using an ultrafast infrared laser source to create a coherent superposition of vibrational motions in a pentacene/C60 photoresistor, we observe that excitation of certain modes in the 1,500–1,700 cm−1 region leads to photocurrent enhancement. Excited vibrations affect predominantly trapped carriers. The effect depends on the nature of the vibration and its mode-specific character can be well described by the vibrational modulation of intermolecular electronic couplings. This presents a new tool for studying electron–phonon coupling and charge dynamics in (bio)molecular materials.en
dc.language.isoenen
dc.publisherNature Publishing Groupen
dc.relation.urlhttp://www.nature.com/doifinder/10.1038/ncomms8880en
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/en
dc.titleMode-selective vibrational modulation of charge transport in organic electronic devicesen
dc.typeArticleen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalNature Communicationsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionFOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlandsen
dc.contributor.institutionCavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3OHE, UKen
dc.contributor.institutionDepartment of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israelen
dc.contributor.institutionIHF, TU Braunschweig, and Innovationlab, Speyerer Strasse 4, 69115 Heidelberg, Germanyen
dc.contributor.institutionSchool of Chemistry and Biochemistry, and Center for Organic Photonics and Electronics, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, Georgia 30332-0400, USAen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorBredas, Jean-Lucen
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