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Percolation Approach to Hopping Transport in Organic Disordered Solids
Author(s) -
Baranovskii S.D.,
Zvyagin I.P.,
Cordes H.,
Yamasaki S.,
Thomas P.
Publication year - 2002
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 - 10.1002/1521-3951(200203)230:1<281::aid-pssb281>3.0.co;2-w
Subject(s) - percolation (cognitive psychology) , variable range hopping , condensed matter physics , seebeck coefficient , conductivity , organic semiconductor , gaussian , percolation theory , materials science , amorphous solid , percolation threshold , density of states , statistical physics , electrical resistivity and conductivity , physics , chemistry , quantum mechanics , optoelectronics , organic chemistry , neuroscience , biology
Percolation approach is used to study the dc hopping conductivity and thermopower in systems with a Gaussian density of localized states typical for disordered organic materials. It is shown that the theoretical methods developed earlier for the description of hopping transport in disordered inorganic solids, such as amorphous semiconductors, can also be successfully applied to description of hopping transport in organic disordered solids, such as conjugated or molecularly doped polymers. Calculations within the percolation approach give results in excellent agreement with those obtained by using a more transparent, though less rigorous approach based on the concept of the transport energy.