A scanning probe microscopy study of ...
Document type :
Article dans une revue scientifique
DOI :
Title :
A scanning probe microscopy study of nanostructured TiO 2 /poly(3-hexylthiophene) hybrid heterojunctions for photovoltaic applications
Author(s) :
Letertre, Laurie [Auteur]
Roche, Roland [Auteur]
Centre Interdisciplinaire de Nanoscience de Marseille [CINaM]
Douhéret, Olivier [Auteur]
Kassa, Hailu [Auteur]
Mariolle, Denis [Auteur]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Chevalier, Nicolas [Auteur]
Systèmes RF [XLIM-SRF]
Borowik, Łukasz [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Dumas, Philippe [Auteur]
Centre Interdisciplinaire de Nanoscience de Marseille [CINaM]
Grevin, Benjamin [Auteur]
Institut Nanosciences et Cryogénie [INAC]
Lazzaroni, Roberto [Auteur]
Leclere, Philippe [Auteur]
Roche, Roland [Auteur]
Centre Interdisciplinaire de Nanoscience de Marseille [CINaM]
Douhéret, Olivier [Auteur]
Kassa, Hailu [Auteur]
Mariolle, Denis [Auteur]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Chevalier, Nicolas [Auteur]
Systèmes RF [XLIM-SRF]
Borowik, Łukasz [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Dumas, Philippe [Auteur]
Centre Interdisciplinaire de Nanoscience de Marseille [CINaM]
Grevin, Benjamin [Auteur]
Institut Nanosciences et Cryogénie [INAC]
Lazzaroni, Roberto [Auteur]
Leclere, Philippe [Auteur]
Journal title :
Beilstein Journal of Nanotechnology
Pages :
2087-2096
Publisher :
Karlsruhe Institute of Technology.
Publication date :
2018
ISSN :
2190-4286
English keyword(s) :
Kelvin probe force microscopy
hybrid photovoltaic
hybrid heterojunctions
photoconductive-AFM
photo-KPFM
poly(3-hexylthiophene)
TiO 2
hybrid photovoltaic
hybrid heterojunctions
photoconductive-AFM
photo-KPFM
poly(3-hexylthiophene)
TiO 2
HAL domain(s) :
Physique [physics]/Matière Condensée [cond-mat]
Sciences de l'ingénieur [physics]/Micro et nanotechnologies/Microélectronique
Sciences de l'ingénieur [physics]/Micro et nanotechnologies/Microélectronique
English abstract : [en]
The nanoscale morphology of photoactive hybrid heterojunctions plays a key role in the performances of hybrid solar cells. In this work, the heterojunctions consist of a nanocolumnar TiO 2 surface covalently grafted with ...
Show more >The nanoscale morphology of photoactive hybrid heterojunctions plays a key role in the performances of hybrid solar cells. In this work, the heterojunctions consist of a nanocolumnar TiO 2 surface covalently grafted with a monolayer of poly(3-hexylthiophene) (P3HT) functionalized with carboxylic groups (-COOH). Through a joint analysis of the photovoltaic properties at the nanoscale by photoconductive-AFM (PC-AFM) and surface photovoltage imaging, we investigated the physical mechanisms taking place locally during the photovoltaic process and the correlation to the nanoscale morphology. A down-shift of the vacuum level of the TiO 2 surface upon grafting was measured by Kelvin probe force microscopy (KPFM), evidencing the formation of a dipole at the TiO 2 /P3HT-COOH interface. Upon in situ illumination, a positive photovoltage was observed as a result of the accumulation of photogenerated holes in the P3HT layer. A positive photocurrent was recorded in PC-AFM measurements, whose spatial mapping was interpreted consistently with the corresponding KPFM analysis, offering a correlated analysis of interest from both a theoretical and material design perspective. 2087Show less >
Show more >The nanoscale morphology of photoactive hybrid heterojunctions plays a key role in the performances of hybrid solar cells. In this work, the heterojunctions consist of a nanocolumnar TiO 2 surface covalently grafted with a monolayer of poly(3-hexylthiophene) (P3HT) functionalized with carboxylic groups (-COOH). Through a joint analysis of the photovoltaic properties at the nanoscale by photoconductive-AFM (PC-AFM) and surface photovoltage imaging, we investigated the physical mechanisms taking place locally during the photovoltaic process and the correlation to the nanoscale morphology. A down-shift of the vacuum level of the TiO 2 surface upon grafting was measured by Kelvin probe force microscopy (KPFM), evidencing the formation of a dipole at the TiO 2 /P3HT-COOH interface. Upon in situ illumination, a positive photovoltage was observed as a result of the accumulation of photogenerated holes in the P3HT layer. A positive photocurrent was recorded in PC-AFM measurements, whose spatial mapping was interpreted consistently with the corresponding KPFM analysis, offering a correlated analysis of interest from both a theoretical and material design perspective. 2087Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :
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- https://www.beilstein-journals.org/bjnano/content/pdf/2190-4286-9-197.pdf
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- https://hal.archives-ouvertes.fr/hal-01977470/document
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