Electroluminescence of bipolar polymer

The electronluminesence characteristic of single-layer light emitting device with a novel bipolar transport material is reported. Oxadiazole-containing triphenylamine polymer was used as the emitting layer. ITO and Mg/Ag were used as electrodes. The device emitted a bright green light, with 5 V of turn-on voltage, and it exhibited a maximum luminance of 2015 cd/m2 and a maximum electroluminenscent efficiency of 0.93 cd/A.