DOI: 10.1063/1.118344 ISSN:
Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode
L. S. Hung, C. W. Tang, M. G. Mason- Physics and Astronomy (miscellaneous)
A bilayer is used as an electrode for organic electroluminescent devices. The bilayer consists of an ultrathin LiF layer adjacent to an electron-transporting layer and an aluminum outerlayer. Devices with the bilayer electrode showed enhanced electron injection and high electroluminescence efficiency as compared with a Mg0.9Ag0.1 cathode. Similar effects were observed when replacing MgO for LiF. The improvements are attributed to band bending of the organic layer in contact with the dielectrics.