27 April 2016 Electronic and optical properties of functionalized polyaromatic hydrocarbons: a computational investigation on perfluorinated circumacenes
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Abstract
We report a systematic computational investigation on the electronic and optical properties of some representive polyaromatic hydrocarbons of interest for solid-state applications. We focus in particular on the five first members of the circumacenes family (i.e., coronene, ovalene, circumanthracene, circumtetracene, and circumpentacene). For the isolated gas-phase molecules we performed all-electrons Density Functional Theory (DFT) and Time Dependent DFT (TDDFT) calculations with a localized Gaussian basis-set and the hybrid exchange-correlation functional B3LYP. We quantified the effect of the complete substitution of peripheral hydrogen atoms with fluorine atoms for a series of key molecular properties relevant for molecular electronics and photonics: electron affinities, ionization energies, quasi-particle energy-gaps, optical absorption spectra, and exciton binding energies. We discuss the possible implications of the general trends observed with respect to both fundamental research and opto-electronic applications.
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Roberto Cardia, Giuliano Malloci, Giovanni Serra, Andrea Bosin, Giancarlo Cappellini, "Electronic and optical properties of functionalized polyaromatic hydrocarbons: a computational investigation on perfluorinated circumacenes", Proc. SPIE 9895, Organic Photonics VII, 98950D (27 April 2016); doi: 10.1117/12.2229744; https://doi.org/10.1117/12.2229744
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