The effect of long-range order on intermolecular interactions in organic semiconductors: zinc octaethyl porphyrin molecular thin film model systems
| Autor: | Federico Boscherini, Denys Naumenko, Silvia Nappini, Federica Bondino, Maurizio Benfatto, Giacomo Rossi, Maddalena Pedio, Lucia Amidani, Luisa Barba, E. Pace, Ashok Kumar, E Segoloni, Francesco d'Acapito, Elena Magnano, Silvia Casassa |
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| Přispěvatelé: | Kumar A., Naumenko D., Rossi G., Magnano E., Nappini S., Bondino F., Segoloni E., Amidani L., D'Acapito F., Boscherini F., Barba L., Pace E., Benfatto M., Casassa S., Pedio M. |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Intermolecular force Stacking General Physics and Astronomy X-ray absorption spectroscopy 02 engineering and technology Triclinic crystal system 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Porphyrin XANES 0104 chemical sciences Organic semiconductor chemistry.chemical_compound Porphyrin thin Film chemistry Chemical physics Organic semiconductors Intermolecular interaction Molecule Physical and Theoretical Chemistry Thin film 0210 nano-technology |
| Zdroj: | Physical Chemistry Chemical Physics 21(2019)41, 22966-22975 Physical chemistry chemical physics (Online) (2019). doi:10.1039/C9CP00954J info:cnr-pdr/source/autori:A. Kumar, D. Naumenko, G. Rossi, E. Magnano, S. Nappini, F. Bondino, E. Segoloni, L. Amidani, F. d'Acapito, F. Boscherini, L. Barba, E. Pace, M. Benfatto, S. Casassa and M. Pedio/titolo:The effect of long-range order on intermolecular interactions in organic semiconductors: zinc octaethyl porphyrin molecular thin film model systems/doi:10.1039%2FC9CP00954J/rivista:Physical chemistry chemical physics (Online)/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume |
| DOI: | 10.1039/C9CP00954J |
| Popis: | In order to optimize the performance of devices based on porphyrin thin films it is of great importance to gain a physical understanding of the various factors which affect their charge transport and light-harvesting properties. In this work, we have employed a multi-technique approach to study vacuum deposited zinc octaethyl porphyrin (ZnOEP) thin films with different degrees of long-range order as model systems. An asymmetrical stretching of the skeletal carbon atoms of the porphyrin conformer has been observed and attributed to ordered molecular stacking and intermolecular interactions. For ordered films, a detailed fitting analysis of the X-ray absorption near edge structure (XANES) using the MXAN code establishes a symmetry reduction in the molecular conformer involving the skeletal carbon atoms of the porphyrin ring; this highlights the consequences of increased π-π stacking of ZnOEP molecules adopting the triclinic structure. The observed asymmetrical stretching of the π conjugation network of the porphyrin structure can have significant implications for charge transport and light harvesting, significantly influencing the performance of porphyrin based devices. |
| Databáze: | OpenAIRE |
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