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Mode-selective vibrational modulation of charge transport in organic electronic devices.
Bakulin, Artem A; Lovrincic, Robert; Yu, Xi; Selig, Oleg; Bakker, Huib J; Rezus, Yves L A; Nayak, Pabitra K; Fonari, Alexandr; Coropceanu, Veaceslav; Brédas, Jean-Luc; Cahen, David.
Afiliación
  • Bakulin AA; 1] FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands [2] Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3OHE, UK.
  • Lovrincic R; 1] Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel [2].
  • Yu X; Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.
  • Selig O; FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
  • Bakker HJ; FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
  • Rezus YL; FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
  • Nayak PK; Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.
  • Fonari A; School of Chemistry and Biochemistry, and Center for Organic Photonics and Electronics, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, Georgia 30332-0400, USA.
  • Coropceanu V; School of Chemistry and Biochemistry, and Center for Organic Photonics and Electronics, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, Georgia 30332-0400, USA.
  • Brédas JL; Solar &Photovoltaics Engineering Research Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.
  • Cahen D; Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.
Nat Commun ; 6: 7880, 2015 Aug 06.
Article en En | MEDLINE | ID: mdl-26246039
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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido