Electric field-dependent charge transport in organic semiconductors | Zendy

Ling Li | Zendy; Steven Van Winckel | Zendy; Jan Genoe | Zendy; Paul Heremans | Zendy

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Electric field-dependent charge transport in organic semiconductors

Author(s) -

Ling Li,

Steven Van Winckel,

Jan Genoe,

Paul Heremans

Publication year - 2009

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3246160

Subject(s) - variable range hopping , electric field , organic semiconductor , condensed matter physics , arrhenius equation , semiconductor , electrical resistivity and conductivity , thermal conduction , charge carrier , conductivity , poole–frenkel effect , materials science , physics , activation energy , chemistry , thermodynamics , quantum mechanics , optoelectronics , organic chemistry

An analytical description is elaborated for the variable range hopping conduction mechanism in the presence of temperature and electric fields for quasi-three-dimensional organic semiconductor systems. In the proposed description, it is assumed that the localized states are randomly distributed in energy and space coordinates. The expression for the hopping conductivity is obtained for the Gaussian density of states. The model is applied to the analysis of both temperature and electric field-dependent hopping transport in organic semiconductors. It is shown that the Poole–Frenkel behavior is only valid in medium electric field regime. Moreover, we conclude that the electric field determines whether the temperature dependence of conductivity in organic semiconductors obeys the Arrhenius law.

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