Premium
Electron and Hole Mobilities in Solid and Liquid Benzene C 6 H 6
Author(s) -
Hirth H.,
Stöckmann F.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220510229
Subject(s) - electron mobility , benzene , electron , polaron , melting point , intermolecular force , condensed matter physics , charge carrier , materials science , lattice (music) , phonon , atmospheric temperature range , chemical physics , chemistry , thermodynamics , physics , organic chemistry , quantum mechanics , molecule , acoustics , composite material
The mobility of electrons and holes has been deduced in the temperature range −100 to 60 °C from transit time measurements. The electron mobility in solid benzene can be described by μ ∝ T −2 , which may be explained by interaction with acoustic phonons. The hole mobility in solid benzene rises exponentially with increasing temperature. The mobility is controlled by interaction with traps depending on the purity of the samples. Approaching the melting point there is a reduction of the electron and hole mobility. This may be explained by thermally produced lattice defects which show up already some ten degrees below the melting point. In liquid benzene the mobilities are three orders of magnitude smaller rising slightly upon temperature. In the liquid polaron‐like states are formed, where the charge carriers propagate by an intermolecular hopping mechanism.