Patent ID: 8088901

Claim:
A material for an organic electroluminescence device, said material having a reduction potential of −1.0V (vsFC + /Fc; Fc refers to a ferrocene) or more in an acetonitrile solution and comprising an azaindenofluorenedione derivative shown by the following formula (I), (IIa) or (IIb): wherein X 1 and X 2 , which may be the same or different, are one of the following divalent groups (a) to (g); Y 1 and Y 2 are independently —N═ or —CH═, Y 3 to Y 6 are independently —N═ or —CR═ and at least one of Y 1 to Y 6 is —N═; R 1 to R 4 and R, which may be the same or different, are a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group or a cyano group; and R 1 and R 2 , or R 3 and R 4 may be bonded to each other to form a ring, respectively; wherein R 21 to R 24 , which may be the same or different, are a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; and R 22 and R 23 may be bonded to each other to form a ring; wherein X 1 and X 2 are the same as X 1 and X 2 in the formula (I); Y 1 to Y 4 are independently —N═ or —CH═, and at least one of Y 1 to Y 4 is —N═; R 8 to R 17 may be the same or different, and R 8 to R 17 are a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group or a cyano group; and adjacent groups of R 8 to R 11 or R 12 to R 15 may be bonded to each other to form a ring.