Trapping centres in anthracene crystals

Hopping Transport in Conductive Heterocyclic Oligomers: Reorganization Energies and Substituent Effects

“…Conjugated organic π-electron materials are of immense interest, both for intrinsic scientific challenges they pose and for potential applications, particularly for the wide variety of semiconducting and conducting properties useful in light-emitting diodes, photovoltaics, field-effect transistors, and other elements of “plastic electronics.” The mechanisms of conductivity in organic materials over nanoscopic and mesoscopic ranges are currently the focus of intense research and likely differ substantially for different systems. , On the molecular scale, as in charge-transfer in many other molecular systems, most conjugated oligomers and polymers are assumed to transport charge at room temperature via a thermally activated hopping-type mechanism . Extensive experimental evidence, particularly the observed thermal signatures, and optical spectra, are consistent with this assumption. − …”