Single-layer electroluminescence device made with novel copolymers containing electron- and hole-transporting moieties

The synthesis of novel copolymers, in which the electron transporting unit (oxadiazole), hole-transporting unit (carbazole) and emitter (naphthalimide) are incorporated into one copolymer, has been reported. It was demonstrated that the EL spectra of single-layer structure device made by these copolymers has a broad luminescent spectrum, which shows a nearly white light and can be quantified in CIE coordinates as x=0.32 and y=0.37.