Abstract
Alkyl-chain substituted arylamine derivatives, solution-processable hole-transporting compounds for organic light-emitting devices (OLEDs), were synthesized. Their thermal, optical, and electrochemical properties were investigated. These compounds exhibited lower melting point than 60 °C and good solubility in common organic solvents, such as toluene, tetrahydrofuran, dichloromethane, and chlorobenzene. The OLEDs with the arylamines as hole-transporting layer from solution-process and tris(8-quinolinolato) aluminum (Alq3) as emitting layer from dry-process were fabricated. The devices showed comparable driving voltages and improved efficiencies, compared with the corresponding device with N, N’-bis(naphthalen-1-yl)-N, N’-bis(phenyl)benzidine (NPD) as hole-transporting layer from dry-process.
