Enhanced brightness of organic light-emitting diodes based on Mg...

Different thicknesses of cesium chloride (CsCl) and various alkali metal chlorides were inserted into organic light-emitting diodes (OLEDs) as electron injection layers (EILs). The basic structure of OLED is indium tin oxide (ITO)/N,N'-diphenyl-N,N'-bis(1-napthyl-phenyl)-1.1'-biphenyl-4.4'-diamine (NPB)/tris-(8-hydroxyquinoline) aluminum (Alq(3))/Mg:Ag/Ag. The electroluminescent (EL) performance curves show that both the brightness and efficiency of the OLEDs can be obviously enh