Electron transport in naphthylamine-based organic compounds

Two naphthylamine-based hole transporters, namely, N,N-'-diphenyl-N,N-'-bis(1-naphthyl)(1,1(')-biphenyl)-4,4(')diamine (NPB) and 4,4('),4(')-tris(n-(2-naphthyl)-n-phenyl-amino)-triphenylamine (2TNATA), were found to possess electron transporting (ET) abilities. From time-of-flight measurements, values of electron mobilities for NPB and 2TNATA are (6-9)x10(-4) and (1-3)x10(-4) cm(2)/V s, respectively, under an applied electric field range of 0.04-0.8 MV/cm at 290 K. An organic light-emitting diode that employed NPB as the ET material was demonstrated. The electron conducting mechanism of NPB and 2TNATA in relation to the Marcus theory [Rev. Mod. Phys. 65, 599 (1993)] from quantum chemistry will be discussed. (c) 2006 American Institute of Physics.