Resonant tunneling diode made of organic semiconductor superlattice

The authors studied the current-voltage characteristics of the organic superlattices of an ITO/1,3,5-tris-(3-methylphenylphenylamino) triphenylamine (m-MTDATA) (5 nm)/[m-MTDATAand 4,7diphenyl-1,10-phenanthroline (Bphen)](4)/Bphen (5 nm)/LiF/Al. The thickness of m-MTDATA was varied from 3 to 7 nm with the fixed Bphen thickness at 3 nm. The current-voltage characteristics of the organic superlattice show a peak and a valley between 3 and 8 V when the thickness of m-MTDATA is 7 nm, which is due to the resonant tunneling currents. It is found that there is no luminance by the resonant tunneling currents. (c) 2006 American Institute of Physics.