N-([1,1'-biphenyl]-4-yl)-N-(4'-(8,9-dihydro-4H-benzo[4,5]thieno[2,3-c]benzo[4,5]thieno[3,2-g]carbazol-8-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7,7-diphenylbenzo[c]acridin-12(7H)-yl)-[1,1'-biphenyl]-4-yl)-9-methyl-9-phenyl-9H-fluoren-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4-(9,9-dimethyl-9H-fluoren-2-yl)phenyl)-4'-(3,6-diphenyl-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7,7-dimethylindeno[1,2-a]carbazol-12(7H)-yl)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-9H-fluoren-1-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7,7-dimethylindeno[1,2-a]carbazol-12(7H)-yl)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-9H-fluoren-4-amine

N-(4'-(7H-dibenzo[b,d]naphtho[1,2-f]azepin-7-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)dibenzo[b,d]furan-3-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7-methyl-7-phenylbenzo[c]acridin-12(7H)-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N-(4'-(7H-dibenzo[c,g]carbazol-7-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)naphthalen-1-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(3-phenyl-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-1,1'-spirobi[cyclobuta[de]naphthalen]-4-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(3-methoxy-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-9H-fluoren-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4-(dibenzo[b,d]furan-4-yl)phenyl)-4'-(2-phenyl-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-amine

4'-(4-([1,1'-biphenyl]-2-yl)-11-bromo-7H-benzo[c]carbazol-7-yl)-N,N-di([1,1'-biphenyl]-4-yl)-[1,1'-biphenyl]-4-amine

N,N-di([1,1'-biphenyl]-4-yl)-4'-(2-phenyl-6H-oxazolo[4,5-c]carbazol-6-yl)-[1,1'-biphenyl]-4-amine

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

N-([1,1'-biphenyl]-4-yl)-N-(4'-(15,15-dimethylbenzo[5',6'][1,4]dithiino[2',3':4,5]indeno[2,1-b]carbazol-13(15H)-yl)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-9H-fluoren-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(15,15-dimethylbenzo[5',6'][1,4]dithiino[2',3':5,6]indeno[1,2-b]carbazol-5(15H)-yl)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-9H-fluoren-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(1-phenylpyrrolo[3,2-c]carbazol-6(1H)-yl)-[1,1'-biphenyl]-4-yl)-9,9'-spirobi[fluoren]-2-amine

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

N-([1,1'-biphenyl]-4-yl)-N-(4'-(13,13-dimethylbenzo[5,6][1,4]dioxino[2,3-a]indeno[1,2-h]carbazol-15(13H)-yl)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-9H-fluoren-2-amine

N,N-di([1,1'-biphenyl]-4-yl)-4'-(13,13-dimethylbenzo[5,6][1,4]dithiino[2,3-a]indeno[1,2-h]carbazol-15(13H)-yl)-[1,1'-biphenyl]-4-amine