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Impact of Fluoroalkylation on the n-Type Charge Transport of Two Naphthodithiophene Diimide Derivatives. | LitMetric

Impact of Fluoroalkylation on the n-Type Charge Transport of Two Naphthodithiophene Diimide Derivatives.

Molecules

Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi, 2, 40126 Bologna, Italy.

Published: July 2021

AI Article Synopsis

Article Abstract

In this work, we investigate two recently synthesized naphthodithiophene diimide (NDTI) derivatives featuring promising n-type charge transport properties. We analyze the charge transport pathways and model charge mobility with the non-adiabatic hopping mechanism using the Marcus-Levich-Jortner rate constant formulation, highlighting the role of fluoroalkylated substitution in α () and at the imide nitrogen () position. In contrast with the experimental results, similar charge mobilities are computed for the two derivatives. However, while displays remarkably anisotropic mobilities with an almost one-dimensional directionality, sustains a more isotropic charge percolation pattern. We propose that the strong anisotropic charge transport character of is responsible for the modest measured charge mobility. In addition, when the role of thermally induced transfer integral fluctuations is investigated, the computed electron-phonon couplings for intermolecular sliding modes indicate that dynamic disorder effects are also more detrimental for the charge transport of than . The lower observed mobility of is therefore rationalized in terms of a prominent anisotropic character of the charge percolation pathways, with the additional contribution of dynamic disorder effects.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8307299PMC
http://dx.doi.org/10.3390/molecules26144119DOI Listing

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