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Emission‐limited currents in low‐mobility solids
Author(s) -
Godlewski J.,
Kalinowski J.,
Mancini G.,
Stizza S.
Publication year - 1994
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.2221830118
Subject(s) - electric field , current (fluid) , scattering , charge carrier , charge (physics) , field (mathematics) , electron mobility , carrier scattering , physics , condensed matter physics , computational physics , materials science , thermodynamics , optics , mathematics , quantum mechanics , pure mathematics
Results of computer‐calculated solutions of a set of equations describing emission‐limited currents (ELC) in low‐mobility solids are presented. The continuity of current equation with electric field‐dependent mobility is used to calculate the field dependence of ELC under various injection conditions. Its shape and steepness are found to change strongly with decreasing scattering length of injected carriers, approaching the standard description of the one‐dimensional Onsager model with field‐independent mobility. The recombination of the charge carriers at the contact is shown to reduce the current without remarkable change of its functional dependence on practically accessible electric fields.