The monograph is dedicated to theoretical and experimental studies of the optical and electrical properties of such functional materials for OLED technologies as: ITO advanced graphene oxide ZnO Alq3 dicyanomethylenepyrane and other hіdni.For scientific and engineering professionals who specialize in the field of electronic materials science nano- microelectronics and solid state physics as well as for graduates graduate students and students in various physical technical and natural sciences specialties.