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Dynamics of the intermolecular transfer integral in crystalline organic semiconductors
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TLDR
In this paper, a mixed quantum chemical and molecular dynamic methodology was used to assess the effect of nuclear dynamics on the modulation of the transfer integrals between close molecules in organic crystalline semiconductor molecular components.Abstract:
In organic crystalline semiconductor molecular components are held together by very weak interactions and the transfer integrals between neighboring molecular orbitals are extremely sensitive to small nuclear displacements. We used a mixed quantum chemical and molecular dynamic methodology to assess the effect of nuclear dynamics on the modulation of the transfer integrals between close molecules. We have found that the fluctuations of the transfer integrals are of the same order of magnitude of their average value for pentacene and anthracene. Under these conditions the usual perturbative treatment of the electron-phonon coupling is invalid, the band description of the crystal breaks down and the charge carriers become localized. Organic crystals of pentacene and anthracene, even in the absence of defects, can be regarded as disordered media with respect to their charge transport properties. These results suggest that the dynamic electronic disorder can be the factor limiting the charge mobility in crystalline organic semiconductors.read more
Citations
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Charge transport in organic semiconductors.
Veaceslav Coropceanu,Jérôme Cornil,Demetrio A. da Silva Filho,Yoann Olivier,Robert J. Silbey,Jean-Luc Brédas +5 more
TL;DR: Electronic Coupling in Oligoacene Derivatives: Factors Influencing Charge Mobility, and the Energy-Splitting-in-Dimer Method 3.1.
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Electron and ambipolar transport in organic field-effect transistors.
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The larger acenes: versatile organic semiconductors.
TL;DR: New approaches to add functionality were developed to improve the processability of these materials in solution, allowing the synthesis of acenes larger than pentacene, which have hitherto been largely unavailable and poorly studied.
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The PYXAID Program for Non-Adiabatic Molecular Dynamics in Condensed Matter Systems.
Alexey V. Akimov,Oleg V. Prezhdo +1 more
TL;DR: The PYXAID program is introduced, developed for non-adiabatic molecular dynamics simulations in condensed matter systems and used to study photoinduced dynamics at the ab initio level in systems composed of hundreds of atoms and involving thousands of electronic states.
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Computational methods for design of organic materials with high charge mobility
TL;DR: This tutorial review describes recent progresses in developing computational tools to assess the carrier mobility in organic molecular semiconductors at the first-principles level.
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