Energy-Level Alignment of a Hole-Transport Organic Layer and ITO: Toward Applications for Organic Electronic Devices
Source abstract
Abstract
2,2′,6,6′-Tetraphenyl-4,4′-dipyranylidene (DIPO-Ph 4 ) was grown by vacuum deposition on an indium tin oxide (ITO) substrate. The films were characterized by atomic force microscopy as well as 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 ITO/DIPO-Ph 4 interface. To interpret our spectroscopic data, we consider the formation of cationic DIPO-Ph 4 at the ITO interface owing to a charge transfer from the organic layer to the substrate. Ionization energy DFT calculations of the neutral and cationic species substantiate this hypothesis. Finally, we present the energetic diagram of the ITO/DIPO-Ph 4 system, and we discuss the application of this interface in various technologically relevant systems, as a hole-injector in OLEDs or as a hole-collector interfacial layer adjacent to the prototypical OPV layer P3HT:PCBM.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Semiconductor materials and interfaces · Molecular Junctions and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Sorbonne Universités, UPMC Univ Paris 06, UMR 7614, Laboratoire de Chimie Physique Matière et Rayonnement (LCPMR), F-75005 Paris, France
Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, Institut Parisien de Chimie Moléculaire (IPCM), F-75005 Paris, France
CEA Saclay, IRAMIS, NIMBE (UMR 3685), Laboratoire d’Innovation en Chimie des Surfaces et Nanosciences (LICSEN), F-91191 Gif-sur-Yvette, France
CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire (IPCM), F-75005 Paris, France
CNR-IOM, Istituto Officina dei Materiali, TASC Laboratory, S.S. 14, km 163.5, 34149 Basovizza, Italy
Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette, France
School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, Singapore 637371, Singapore
Funding
Agence Nationale de la Recherche
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