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

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

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-7-phenyl-2,3-dihydro-1H-inden-4-amine

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

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-10-(naphthalen-2-yl)phenanthren-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(9,9-dimethylacridin-10(9H)-yl)-[1,1'-biphenyl]-4-yl)-9,9-diphenyl-9H-fluoren-2-amine

N-(4'-(7H-dibenzo[c,g]carbazol-7-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-9,9'-spirobi[fluoren]-2-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-[1,1':4',1''-terphenyl]-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)phenanthren-9-amine

N-([1,1'-biphenyl]-4-yl)-N-(4-(9,9-dimethyl-9H-fluoren-2-yl)phenyl)-4'-(2-phenyl-11H-benzo[a]carbazol-11-yl)-[1,1'-biphenyl]-4-amine

N,N-di([1,1'-biphenyl]-4-yl)-4'-(7H-benzo[4,5]thieno[3,2-c]benzo[4,5]thieno[2,3-g]carbazol-7-yl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7,7-diphenyldibenzo[c,h]acridin-14(7H)-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N,N-di([1,1'-biphenyl]-4-yl)-4'-(9,9-dimethylbenzo[5,6][1,4]dioxino[2,3-b]indeno[1,2-h]carbazol-7(9H)-yl)-[1,1'-biphenyl]-4-amine

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

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7,7-dimethylindeno[2,1-b]carbazol-5(7H)-yl)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-9H-fluoren-2-amine

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

N-([1,1'-biphenyl]-4-yl)-N-(4-(dibenzo[b,d]thiophen-4-yl)phenyl)-4'-(12,12-dimethylindeno[1,2-c]carbazol-5(12H)-yl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7,7-dimethylbenzo[5',6'][1,4]dioxino[2',3':5,6]indeno[1,2-a]carbazol-16(7H)-yl)-[1,1'-biphenyl]-4-yl)-9,9-dimethyl-9H-fluoren-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7-(dibenzo[b,d]thiophen-4-yl)-3-phenylpyrrolo[3,2-a]carbazol-10(3H)-yl)-[1,1'-biphenyl]-4-yl)dibenzo[b,d]thiophen-4-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7-(9,9-dimethyl-9H-fluoren-2-yl)-3-phenylpyrrolo[3,2-a]carbazol-10(3H)-yl)-[1,1'-biphenyl]-4-yl)dibenzo[b,d]thiophen-4-amine