Resonant tunneling diode made of organic semiconductor superlattice

Abstract

The authors studied the current-voltage characteristics of the organic superlattices of an ITO/1,3,5-tris-(3-methylphenylphenylamino) triphenylamine (m-MTDATA) (5nm)∕[m-MTDATAand4,7diphenyl-1,10-phenanthroline(Bphen)]4∕Bphen (5nm)∕LiF∕Al. The thickness of m-MTDATA was varied from 3to7nm with the fixed Bphen thickness at 3nm. The current-voltage characteristics of the organic superlattice show a peak and a valley between 3 and 8V when the thickness of m-MTDATA is 7nm, which is due to the resonant tunneling currents. It is found that there is no luminance by the resonant tunneling currents.