Influences of Dye Doping and Hole Blocking Layer Insertion onOLED Performance

摘要

This study presents the influences of dye doping and hole blocking layer insertion on theelectroluminescent properties of the blue organic light emitting diode. The luminance of the devicewas significantly improved by BCzVB doping because of the utilization of effective Forster energytransfer and the improvement of carrier injection and trapping; a BCzVB dominant emission wasobserved. Furthermore, when a BCP layer was inserted between the TBADN:BCzVB and A1q3layers, a thin BCP layer insertion enhanced the injection of electrons and improved the luminance ofthe device. In contrast, a thick BCP layer insertion caused a delay in electron transport, resulting in adecrease in current density and a deterioration in luminance.