| 摘要 |
Disclosed are an organic electroluminescent device (organic EL device) having improved luminous efficiency, sufficiently secured driving stability, and a simple construction, and a material for an organic EL device. The material for an organic EL device includes a carborane compound having a structure in which at least one carborane ring and at least one dibenzothiophene ring are present, and the at least one carborane ring is bonded to the at least one dibenzothiophene ring at position 1, 2, or 3. In addition, the organic EL device includes, between an anode and a cathode laminated on a substrate, at least one organic layer, in which the at least one organic layer includes the carborane compound. |
| 主权项 |
1. A material for an organic electroluminescent device, comprising a carborane compound represented by the general formula (1), (2), or (3):wherein,
a ring A represents a divalent carborane group C2B10H10 represented by the formula (1a) or the formula (1b), and when a plurality of rings A are present in a molecule thereof, the rings may be identical to or different from each other; r represents a number of repetitions and represents an integer of 0 or 1; L1 and L2 each represent a single bond, a divalent substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 carbon atoms, a divalent substituted or unsubstituted aromatic heterocyclic group having 3 to 30 carbon atoms, or a divalent linked aromatic group formed by linking 2 to 6 aromatic groups selected from the aromatic hydrocarbon groups or the aromatic heterocyclic groups, terminal L1 and L2 may each represent an alkyl group having 1 to 12 carbon atoms or an alkoxy group having 1 to 12 carbon atoms, and when L1 and L2 each represent the linked aromatic group, the group may be linear or branched, and aromatic rings to be linked may be identical to or different from each other, provided that when r represents 0, the single bond is excluded, and when r represents 1, at least one aromatic heterocyclic group is included; L3 represents a hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 3 to 30 carbon atoms, a linked aromatic group formed by linking 2 to 6 aromatic groups selected from the substituted or unsubstituted aromatic hydrocarbon groups and the substituted or unsubstituted aromatic heterocyclic groups, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms, and when L3 represents the linked aromatic group, the group may be linear or branched, and aromatic rings to be linked may be identical to or different from each other; and when the aromatic group in each of L1 to L3 has a substituent, the substituent is an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or an acetyl group, the aromatic group may have a plurality of substituents, and the plurality of substituents may be identical to or different from each other. |
