Abstract
Two types of organic electroluminescent devices (OELDs) using perylene-dispersed polyimide as a lumophore were fabricated in the present study. One is single polymeric layer device in a structure of anode/perylene-dispersed polyimide/cathode, the other is double polymeric layer of anode/hole transport material-dispersed polyimide/perylene-dispersed polyimide/cathode. The turn-on voltage of the single and double layer devices was ca. 5 Vdc and 9 Vdc, respectively. The emission color was yellowish green. The double layer device was more efficient than the single layer device due to the balanced injection of holes and electrons in spite of the relatively high driving voltage.
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