Ditriphenylene derivative and organic electroluminescent device using the same

A organic EL device comprising a pair of electrodes consisting of a cathode and an anode and between the pairs of electrodes comprising a layer of material with a general formula (I) as following:

• Wherein m, n represent an integer of 0 to 10. X is a divalent bridge selected from the atom or group consisting from O, S, C(R3)(R4), NR5, Si(R6)(R7). Ar1, Ar2 are the same or different. Ar1, Ar2 represent a hydrogen atom, a halide, a substituted or unsubstituted arylamine group, a substituted or unsubstituted aryl group system having 5 to 60 aromatic ring atoms and each aromatic ring to form a mono or polycyclic ring system, a substituted or unsubstituted heteroaryl group system having 5 to 60 aromatic ring atoms and each aromatic ring to form a mono or polycyclic ring system. R1 to R7 are identical or different. R1 to R7 are independently selected from the group consisting of a hydrogen atom, alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 50 carbon atoms, a substituted or unsubstituted heteroaryl group having 6 to 50 carbon atoms.