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Effects of Magnetic Field on Conductance and Electroluminescence in Organic Devices
Author(s) -
Ehrenfreund Eitan,
Vardeny Zeev Valy
Publication year - 2012
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.201100120
Subject(s) - polaron , chemistry , hyperfine structure , condensed matter physics , electroluminescence , conductance , isotropy , annihilation , anisotropy , magnetic field , organic semiconductor , spin (aerodynamics) , spin–orbit interaction , triplet state , atomic physics , physics , quantum mechanics , electron , molecule , organic chemistry , layer (electronics) , thermodynamics
In this contribution we review recent advances of the organic magnetic field effects, namely magneto‐conductance and magneto‐electroluminescence, in both experiment and theory. We describe a number of processes, including the polaron‐pair and triplet‐triplet pair mechanisms that are responsible for the magnetic field effects in organic semiconductor systems. For the polaron pair mechanism, we review in detail the effect of the hyperfine interaction, both isotropic and anisotropic; different g ‐factors of the two polarons composing the pair; and the spin orbit interaction. The effect of the triplet‐triplet annihilation process is also analyzed. Experimental examples for each case treated theoretically are given.