Electric-field-assisted bipolar charge generation from internal charge separation zone composed of doped organic bilayer

For studying the mechanism of electric-field-assisted bipolar charges spouting from an internal charge separation (ICS) zone, three different categories of organic thin-film devices, which contain p-n heterojunction bilayer of tetrafluorotetracyanoquinodimethane-doped N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine and Mg-doped tris(8-quinolinolato)aluminum(III) for the ICS zone, have been fabricated. The bipolar charge separation mechanism in p- and n-doped organic bilayer system was explained in terms of the charge generation-recombination mechanism used in traditional inorganic p-n homojunction diodes.