CNTs in optoelectronic devices: New structural and photophysical insights on porphyrin-DWCNTs hybrid materials

C. Aurisicchio, R. Marega, V. Corvaglia, J. Mohanraj, R. Delamare, D.A. Vlad, C. Kusko, C.A. Dutu, A. Minoia, G. Deshayes, O. Coulembier, S. Melinte, P. Dubois, R. Lazzaroni, N. Armaroli, D. Bonifazi

Research output: Contribution to journalArticle

Abstract

The preparation and physical characterization of diverse porphyrin-derived double-walled carbon nanotubes (DWCNTs) conjugates are described. A porphyrin molecule is covalently linked and physically adsorbed to COOH-derived DWCNTs. The photophysical properties of all porphyrin-CNTs derivatives are studied in solution and in polymeric matrices. Definitive experimental evidence for photoinduced electron and/or energy transfer processes involving the porphyrin chromophores and the CNT wall is not obtained, but solid-state UV-vis absorption profiles display electronic transitions fingerprinting J- and H- type aggregates, where porphyrin molecules intermolecularly interact "head-to-tail" and "face-to-face", respectively. In parallel, molecular modeling based on force-field simulations is performed to understand the structure of the porphyrin-CNTs interface and the nature of the interactions between the porphyrins and the DWCNTs. Finally, multilayered-type devices are fabricated with the aim of investigating the interaction of the porphyrin-derived DWCNTs with poly(3-hexylthiophene)-pyrene matrices containing small amounts of 1-[3-(methoxycarbonyl)propyl]-1-phenyl-[6.6]C .
Original languageEnglish
Pages (from-to)3209-3222
Number of pages14
JournalAdvanced functional materials
Volume22
Issue number15
DOIs
Publication statusPublished - 7 Aug 2012

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