Patent ID: 8698392
Filing Date: 2014-04-15
Classification: H01L,H05B,Y02E,Y02P

Abstract:
1. An organic electroluminescent device comprising two electrodes facing each other and connecting to an external circuit providing electric energy, at least one of which is transparent or semitransparent; the two electrodes sandwiching a plurality of luminescent units containing one or more organic layers, one of which is a luminescent layer emitting light by recombination of holes and electrons; and a charge generating layer, which is interposed between two of the luminescent units, said luminescent units and said charge generating layer being sandwiched by said two electrodes, characterized in that adjacent two of the luminescent units are partitioned by the charge generating layer; the charge generating layer comprises one or more types of metals (A) having a work function of 3.0 eV or less and one or more types of compound (B) having a work function of 4.0 eV or more; and at least one of the luminescent units has a luminescent layer containing a polymer luminescent material selected from the group consisting of polyfluorene, derivatives and copolymers thereof; polyarylene, derivatives and copolymers thereof; polyarylenevinylene, derivatives and copolymers thereof; and (co)polymers of aromatic amines and derivatives thereof, and at least one of the layers constituting each luminescent unit is a film formed from a solution comprising water.