Patent ID: 6248458
Filing Date: 2001-06-19
Classification: H01L,Y10S,Y10T

Abstract:
An organic electroluminescent (EL) device comprising: at least one organic EL multilayer between a first electrode and a second electrode, and a layer I including at least one first material from the group consisting of compounds of chemical formula I: ##STR10##where:each of R.sub.1 to R.sub.4 is independently hydrogen, an alkyl or alkoxy group having from 1 to 5 carbon atoms, aryl, aryloxy or a halogen, or at least one among pairs of adjacent substituents of R.sub.1 through R.sub.4 form an five or six-numbered conjugated cyclic ring; and,A each independently denotes hydrogen, an alkyl group having from 1 to 5 carbon atoms, or aryl;and layer I including at least one second material comprising Li.sub.2 O.