The effect of exciplex dynamics on the current in a bilayer organic light emitting diode with ambipolar injection is explored. Exciplex formation facilitates intermolecular electron-hole recombination across the interface. We discuss the characteristics of the exciplex recombination current with respect to different energy level alignments, interface recombination rates, and exciplex relaxation lifetimes, using a model device consisting of a C 60/tetracene bilayer.
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This work was supported in part by a University of Minnesota Graduate School Fellowship. Access to the facilities of the Minnesota Supercomputing Institute is gratefully acknowledged. Work at Los Alamos National Laboratory was supported by DoE Office of Basic Energy Sciences Work Proposal No. 08SPCE973.
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