Materials and Fabrication of Organic Bilayer EL Device Preparation of Aromatic Tertiary Amines as Hole Transportating Agent and Their Current-Voltage Characteristics

Abstract

As a homology of the diamine, which has been demonstrated as a hole transportating material in organic electroluminescent diode by C. W. Tang et al., 9, 9-bis{p-[N, N-bis (p-substituted phenyl)amino]phenyl}fluorenes (abbreviated as Flu-diamine) have been synthesized by means of a m odified Ullmann synthetic procedure. Their single thin film devices, [ _??_ ITO _??_ Flu-diamine _??_ Al _??_ ], have been fabricated to examine their current-voltage characteristics. The order of their threshold voltage has been found to be parallel to that of the positive inductive effect of the substituents on p-substituted phenyl group. This order is also parallel to that of redox potentials of Flu-diamines in cyclic voltammetry.