A novel 1,5-naphthylenediamine derivative as potential organic blue light-emitting material

A novel 1,5-naphthylenediamine derivative, 1,5-bis[N-(1-naphthyl)-N-phenyl]naphthalene diamine (NND), was designed and synthesized. This amine exhibited high glass transition temperature (Tg=127 °C) and hole transporting ability. The device with a structure of ITO/N,N′-bis(naphthalene-1-yl)-N,N′-diphenyl-benzidine(NPB)/NND/2-(4-tert-butylphenyl)-5-(4-biphenyl)-1,3,4-oxadiazole (PBD)/Mg:Ag was fabricated and bright blue light emission was obtained with a peak wavelength of 432 nm, and the color coordinate in CIE chromaticity is (0.172, 0.126). The brightness of 250 cd/m2 at 14 V was achieved.