Abstract: Electroluminescent（ EL） devices based on organic materials are of considerable interest owing to their attractive characteristics and applications to flat panel displays. In various EL device structures which involve either multilayer or blend architectures have been used due to the high ability of balancing charge carrier injection and recombination. Generally speaking the EL emission comes from emitter which are bulk components or dopant have much been paid attentions. In this review is presented on recent progress in intermolecular exciplex or excimer EL emission and related organic/polymeric materials and devices. In terms of description on the negative and active effect of the exciplex emission on the EL emission of bulk components we present how to eliminate the poor effect and exert the obverse role,respectively,especially application of exciplex and excimer emissive bands for white EL device,thus EL device structure and fabracation processes could be simplified.