N-(4'-(4H-naphtho[1',8':5,6,7][1,4]diazepino[3,2,1-jk]carbazol-7-yl)-[1,1'-biphenyl]-4-yl)-9-([1,1'-biphenyl]-3-yl)-N-phenyl-9H-carbazol-4-amine

9-(4'-([1,1'-biphenyl]-4-yl(phenyl)amino)-[1,1'-biphenyl]-4-yl)-N,N-diphenyl-9H-carbazol-2-amine

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9'-phenyl-9H,9'H-1,4'-bicarbazole

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazole-3-carbaldehyde

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-3-decyl-9H-carbazole

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-3-octyl-9H-carbazole

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-6',9'-diphenyl-9H,9'H-2,3'-bicarbazole

(E)-9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-3-(4-(pyridin-2-yl)styryl)-9H-carbazole

2-(9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-6-(thieno[2,3-c]pyridin-2-yl)-9H-carbazol-3-yl)thieno[3,2-c]pyridine

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-3-((4-(tert-butyl)phenyl)diphenylsilyl)-9H-carbazole

4-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-2-(9H-carbazol-9-yl)-3,6'-bithieno[2,3-b]pyridine

4-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-6-(9H-carbazol-9-yl)-3,6'-bifuro[2,3-c]pyridazine

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-3,6-bis(naphtho[1,2-b]thiophen-2-yl)-9H-carbazole

7,7'-(9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazole-3,6-diyl)bis(2-phenylbenzo[d]oxazole)

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-3-(4-vinylphenyl)-9H-carbazole

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-1-chloro-9H-carbazole

(E)-9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-3-(dec-1-en-1-yl)-9H-carbazole

2,2'-(9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazole-2,6-diyl)bis(6-(tert-butyl)benzo[d]thiazole)

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-2-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-9H-carbazole

9-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-3-(dibenzo[b,d]furan-2-yl)-9H-carbazole