COMPOUND, MATERIAL FOR ORGANIC ELECTROLUMINESCENCE ELEMENT, ORGANIC ELECTROLUMINESCENCE ELEMENT, AND ELECTRONIC DEVICE
FIG1 is a schematic view showing the structure of an organic EL device in an embodiment of the invention 
A schematic structure of an example of the organic EL device is shown in FIG1, wherein the organic EL device 1 comprises a substrate 2, an anode 3, a cathode 4, and an emission unit 10 disposed between the anode 3 and the cathode 4. The emission unit 10 comprises a light emitting layer 5. An anode-side organic layer 6 (for example, a hole injecting layer or a hole transporting layer) may be disposed between the light emitting layer 5 and the anode 3, and a cathode-side organic layer 7 (for example, an electron injecting layer or an electron transporting layer) may be disposed between the light emitting layer 5 and the cathode 4. An electron blocking layer (not shown) may be disposed on the anode 3 side of the light emitting layer 5, and a hole blocking layer (not shown) may be disposed on the cathode 4 side of the light emitting layer 5. With these blocking layers, electrons and holes are confined in the light emitting layer 5 to increase the exciton generation in the light emitting layer 5.
schematic view
2
is
10
ring has emission unit
1
preferably
["1. A compound represented by formula (1): wherein: R 1  to R 7  and R 11  to R 18  are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 30 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 36 carbon atoms, a mono- or di-substituted amino group having a substituent selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms and a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 ring carbon atoms, a mono-, di- or tri-substituted silyl group having a substituent selected  from the group consisting of a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms and a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms, a halogen atom, a cyano group, or a nitro group, R 1  and R 2 , adjacent two selected from R 4  to R 7 , adjacent two selected from R 11  to R 14 , and adjacent two selected from R 15  to R 18  may be bonded to each other to form a ring structure, Ar is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, wherein the aryl group is composed of only a six-membered ring, n is 1 or 2, a is 0, 1, 2, or 3, when a is 0, Ar is directly bonded to the central nitrogen atom, and when a is 2 or 3, two or three L 1' s may be the same or different, b is 1, 2, or 3, when b is 2 or 3, two or three L 2' s may be the same or different, c is 1, 2, or 3, when c is 1, L 3  is a group represented by formula (L3-1) or (L3-2), when c is 2 or 3, two or three L 3' s may be the same or different, and at least one selected from two or three L 3' s is a group represented by formula (L3-1) or (L3-2) and L 3  not a group represented by formula (L3-1) or (L3-2) is a substituted or unsubstituted aromatic hydrocarbon group having 6 to 18 ring carbon atom: wherein: R 21  to R 25  are each independently as defined above with respect to R 1  to R7, *a is directly or indirectly bonded to the central nitrogen atom, *b is directly or indirectly bonded to the nitrogen atom of the carbazole structure, and L 1  and L 2  are each independently a substituted or unsubstituted aromatic hydrocarbon group having 6 to 18 ring carbon atoms."]