POLYIMIDE CONTAINING TRIPHENYLAMINE DERIVATIVE STRUCTURE, PREPARATION THEREOF AND ORAGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME

摘要

An organic EL device has a layer containing a polyimide having a triphenylamine derivative (TPD) unit. The use of the polyimide as a polymer layer material can ensure solvent selectivity in coating the light-emitting layer and the organic EL device exhibits good luminance efficiency even after a prolonged period use.