English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The anisotropic electron transport in the (001) plane of sublimation-grownCl$_{2}$-NDI (naphthalene diimide) single crystals is analysed over atemperature range between 175 K and 300 K. Upon cooling from room temperatureto 175 K the electron mobility along the direction of preferred transportmonotonously increases from 1.5 cm$^{2}$/Vs to 2.8 cm$^{2}$/Vs according to adistinct temperature relation of $~T^{-1.3}$. At first glance, thesecharacteristics allude to a coherent, i.e. band-like charge carrier transportpredominantly governed by inelastic scattering with accoustic phonons. However,as we will demonstrate, the experimental mobility data can be consistentlydescribed within the framework of incoherent, hopping-type transport modeled byLevich-Jortner rates, explicitly accounting for the inner and outer relaxationenergies related to thermally induced lattice effects and enhancedelectron-phonon interaction at elevated temperatures. Complementaryband-structure calculations yielding temperature dependent effective masstensors deviate stronger from experimentally observed spatially anisotropictransport behavior. Thus, these results hint at the fact that by the particularinterplay of the transport energies the mobility of a given organicsemiconducting material might appear to be band-like in a certain temperatureregime even though the underlying charge carrier transport can be ofincoherent, hopping-type nature. Building on this description, we furtherexplore the role of the intermolecular electronic coupling and develop aprocedure to distinguish between its dependence on static and dynamic latticedeformation upon temperature variation.

Anisotropic electron mobility studies on Cl2-NDI single crystals and the role of static and dynamic lattice deformations upon temperature variation