Nanoscale mapping of photo-induced charge carriers generated at interfaces of a donor/acceptor 2D-assembly by light-assisted- scanning tunneling microscopy - Université Paris Cité Accéder directement au contenu
Article Dans Une Revue Advanced Materials Interfaces Année : 2020

Nanoscale mapping of photo-induced charge carriers generated at interfaces of a donor/acceptor 2D-assembly by light-assisted- scanning tunneling microscopy

Andrés Lombana
  • Fonction : Auteur
Nicolas Battaglini
  • Fonction : Auteur
  • PersonId : 1081205
Samia Zrig
  • Fonction : Auteur
Jerome Lagoute
Alexandre Chevillot-Biraud
  • Fonction : Auteur

Résumé

We have investigated charge transfers between donor (D) and acceptor (A) species at their excited state in a light-assisted STM setup (LA-STM). Through an all-solution process, we have elaborated supramolecular architectures deposited on the Au(111) surface and made of 2D islands of PC71BM (electron acceptor) on top of a single layer of the polymer PTB7 (electron donor). The STM junction under modulated laser irradiation exhibits a strong background of photothermal signal attributed both to vertical and lateral expansion of the tip. However, from the analysis of di↵erential images obtained at opposite voltages, we have been able to detect additional photocurrent peaks located at the PTB7/PC71BM interfaces, providing evidence for active charge transfer between D/A species at their excited state. We discuss this phenomenon in the framework of a charge transport model at interfaces in organic electronics systems.
Fichier principal
Vignette du fichier
LASTM_PTB7-PCBM.pdf (8.66 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02996285 , version 1 (09-11-2020)

Identifiants

Citer

Andrés Lombana, Nicolas Battaglini, Samia Zrig, Jerome Lagoute, Alexandre Chevillot-Biraud, et al.. Nanoscale mapping of photo-induced charge carriers generated at interfaces of a donor/acceptor 2D-assembly by light-assisted- scanning tunneling microscopy. Advanced Materials Interfaces, inPress, ⟨10.1002/admi.202001325⟩. ⟨hal-02996285⟩
38 Consultations
96 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More