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Hole Transport in Bis (4‐ N , N ‐Diethylamino‐2‐Methylphenyl)‐4‐Methylphenylmethane Doped Polymers
Author(s) -
Borsenberger P. M.
Publication year - 1992
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.2221730219
Subject(s) - doping , polycarbonate , formalism (music) , polystyrene , polymer , dipole , materials science , chemistry , analytical chemistry (journal) , condensed matter physics , polymer chemistry , physics , organic chemistry , art , musical , visual arts
Hole mobilities have been measured in bis (4‐ N , N ‐diethylamino‐2‐methylphenyl)‐4‐methylphenylmethane (MPMP) doped polystyrene (PS) and polycarbonate (PC) over a range of MPMP concentrations. The results are described by the disorder formalism. The formalism is based on the assumption that charge transport occurrs by hopping through a manifold of hopping sites subject to energetic and positional disorder. The results show that the width of the density of hoppiny states increases with increasing PC concentration and decreases with increasing PS concentration. The concentration dependencies are attributed to dipolar fields associated with dipole moments of MPMP or the host polymer. The positional disorder increases with increasing polymer concentration in both materials.