Novel organic electroluminescent compound and organic electroluminescent device comprising same

According to the invention, indolocarbazole is connected with a very good electron transmission material, namely a phenanthrene compound with a large pi conjugate structure, so that a classical indolo-phenanthrene-carbazole compound is formed; the introduction of different substituent groups enables a material to have better plane structure and conjugate system in comparison with a simple indolo-phenanthrene-carbazole compound. Under a condition that the luminous brightness is not changed, the luminous efficiency is remarkably improved in comparison with a contrast sample. 1,4-dibromo-2,5-dinitrobenzene and benzo[9,10]phenanthrene-2-boric acid are used as raw materials, synthesis and purification comparison processes are simple, the cost is low, and industrialized development demands can be met.