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Energy level alignment of a hole-transport organic layer and ITO: Towards applications for organic electronic devices

Quentin Arnoux 1, 2, 3 Anthony Boucly 1 Vincent Barth 2, 3 Rabah Benbalagh 1 Albano Cossaro 4 Luca Floreano 4 Mathieu Silly 5 Fausto Sirotti 5 Etienne Derat 2 Stephane Carniato 1 Fabrice Bournel 1, 5 Jean-Jacques Gallet 1, 5 Denis Fichou 6, 2 Ludovic Tortech 2, 3 Francois Rochet 1, 5
1 LCPMR - Laboratoire de Chimie Physique - Matière et Rayonnement
2 IPCM - Institut Parisien de Chimie Moléculaire
3 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
4 TASC - Laboratorio Nazionale TASC
5 SSOLEIL - Synchrotron SOLEIL
6 SPMS-PAP-02-01 - Division of Physics and Applied Physics [Nanyang Technological University]
Abstract : 2,2’,6,6’-tetraphenyl-4,4’-dipyranylidene (DIPO-Ph4) was grown by vacuum-deposition on an indium tin oxide (ITO) substrate. The films were characterized by atomic force microscopy and synchrotron radiation UV and X-ray photoelectron spectroscopy to gain an insight into the material growth and to better understand the electronic properties of the DIPO-Ph4/ITO interface. Results show formation of cationic DIPO-Ph4 at ITO interface with a charge transfer from the organic layer to the anode material. This has been confronted to DFT calculations. We present as a conclusion the energetic diagram of the DIPO-Ph4/ITO system and some perspectives with a typical photovoltaic active layer: P3HT:PCBM.
Keywords : Charge transfer Interfacial layer Organic solar cells Hole-transport layer Metal/Organic interface Photoemission spectroscopy
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CEA | CNRS | DSM-IRAMIS | PUBNIMBE | IRAMIS-NIMBE | MICHEM | INC-CNRS | SYNCHROTRON-SOLEIL | IPCM | LCPMR | UPMC | CEA-DRF | CEA-UPSAY | SORBONNE-UNIVERSITE | SU-SCIENCES | SU-TI

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Quentin Arnoux, Anthony Boucly, Vincent Barth, Rabah Benbalagh, Albano Cossaro, et al.. Energy level alignment of a hole-transport organic layer and ITO: Towards applications for organic electronic devices. ACS Applied Materials & Interfaces, Washington, D.C. : American Chemical Society, 2017, 9 (36), pp.30992-31004. ⟨10.1021/acsami.7b06691⟩. ⟨cea-01575439⟩

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