Details

Autor(en) / Beteiligte

• Borsenberger, P.M.
• Gruenbaum, W.T.
• Magin, E.H.

Titel

Hole transport in bis(ditolylaminostyryl)benzene doped poly(styrene)

Ist Teil von

• Physica. B, Condensed matter, 1996-11, Vol.228 (3), p.233-238

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

1996

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• Hole mobilities have been measured in poly(styrene) (PS) doped with bis(ditolylaminostyryl)benzene (TASB). TASB is a weakly polar molecule that contains two aniline donor functionalities. The dipole moment is 0.54 D. The results are described by a formalism based on disorder, due to Bässler and coworkers. According to the formalism, charge transport occurs by hopping within a manifold of localized states that are subject to a distribution of energies. A key parameter of the formalism is the energy width of the hopping site manifold. The width is described by a model based on dipolar disorder. The model is based on the assumption that the total width is comprised of a dipolar component and a van der Waals component. For TASB, with a near-zero dipole moment, the dipolar component vanishes and the total width becomes equal to the van der Waals component. For TASB, the van der Waals component is 0.102 eV and is independent of concentration. The absence of a concentration dependence is attributed to an intramolecular interaction between the two aniline functionalities associated with each TASB molecule.