POLYCYCLIC AROMATIC COMPOUND

1 .- 17 . (canceled)

18 . A material for an organic device comprising a polycyclic aromatic compound represented by the following general formula (1), or an oligomer of a polycyclic aromatic compound having plural structures each represented by the following general formula (1):

wherein in formula (1),

each of ring A, ring B and ring C independently represents an aryl ring or a heteroaryl ring, while at least one hydrogen atom in these rings may be substituted;

Y 1 represents B, P═O, or P═S;

when Y 1 represents B, each of X 1 and X 2 independently represents O, N—R, S or Se, wherein R of the moiety N—R represents an aryl which may be substituted, a heteroaryl which may be substituted, or an alkyl which may be substituted, and R of the moiety N—R may be bonded to a carbon atom adjacent to the position (atom) of bonding to X 1 or X 2 in the ring A, ring B and/or ring C via —O—, —S—, —C(—R a ) 2 —, or a single bond, wherein R a represents a hydrogen atom or an alkyl, while the adjacent carbon atom is not a carbon atom that constitutes the central fused bicyclic structure of the said formula (1) composed of Y 1 , X 1 and X 2 ;

when Y 1 represents P═O or P═S, each of X 1 and X 2 independently represents O, S or Se, one of X 1 and X 2 represents O while the other represents S or Se, one of X 1 and X 2 represents N—R while the other represents Se, or one of X 1 and X 2 represents S while the other represents Se, wherein R of the moiety N—R represents an aryl which may be substituted, a heteroaryl which may be substituted, or an alkyl which may be substituted, and R of the moiety N—R may be bonded to a carbon atom adjacent to the position (atom) of bonding to X 1 or X 2 in the ring A, ring B and/or ring C via —O—, —S—, —C(—R a ) 2 —, or a single bond, wherein R 1 represents a hydrogen atom or an alkyl, while the adjacent carbon atom is not a carbon atom that constitutes the central fused bicyclic structure of the said formula (1) composed of Y 1 , X 1 and X 2 ; and

at least one hydrogen atom in the compound or structure represented by formula (1) may be substituted by a halogen atom or a deuterium atom.

19 . The material for an organic device described in claim 18 , wherein in formula (1),

each of ring A, ring B and ring C independently represents an aryl ring or a heteroaryl ring, while at least one hydrogen atom in these rings may be substituted by a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, a substituted or unsubstituted diarylamino, a substituted or unsubstituted diheteroarylamino, a substituted or unsubstituted arylheteroarylamino, a substituted or unsubstituted alkyl, a substituted or unsubstituted alkoxy, or a substituted or unsubstituted aryloxy, and these rings have a 5-membered or 6-membered ring that shares a bond(s) with the fused bicyclic structure at the center of the above formula constructed by Y 1 , X 1 and X 2 ;

Y 1 represents B, P═O, or P═S;

when Y 1 represents B, each of X 1 and X 2 independently represents O, N—R, S or Se, wherein R of the moiety N—R represents an aryl which may be substituted by an alkyl, a heteroaryl which may be substituted by an alkyl, or an alkyl which may be substituted by an alkyl, R of the moiety N—R may be bonded to a carbon atom adjacent to the position (atom) of bonding to X 1 or X 2 in the ring A, ring B and/or ring C via —O—, —S—, —C(—R a ) 2 — or a single bond, wherein R 1 represents a hydrogen atom or an alkyl, while the adjacent carbon atom is not a carbon atom that constitutes the central fused bicyclic structure of the said formula (1) composed of Y 1 , X 1 and X 2 ;

when Y 1 represents P═O or P═S, each of X 1 and X 2 independently represents O, S or Se, one of X 1 and X 2 represents O while the other represents S or Se, one of X 1 and X 2 represents N—R while the other represents Se, or one of X 1 and X 2 represents S while the other represents Se, wherein R of the moiety N—R represents an aryl which may be substituted by an alkyl, a heteroaryl which may be substituted by an alkyl, or an alkyl which may be substituted by an alkyl, R of the moiety N—R may be bonded to a carbon atom adjacent to the position (atom) of bonding to X 1 or X 2 in the ring A, ring B and/or ring C via —O—, —S—, —C(—R a ) 2 — or a single bond, wherein R a represents a hydrogen atom or an alkyl, while the adjacent carbon atom is not a carbon atom that constitutes the central fused bicyclic structure of the said formula (1) composed of Y 1 , X 1 and X 2 ;

at least one hydrogen atom in the compound or structure represented by formula (1) may be substituted by a halogen atom or a deuterium atom; and

the oligomer is a dimer or a trimer, which has two or three of the structure represented by general formula (1).

20 . The material for an organic device described in claim 18 , wherein the above general formula (1) is represented by the following general formula (2):

wherein in formula (2),

each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 and R 11 independently represents a hydrogen atom, an aryl, a heteroaryl, a diarylamino, a diheteroarylamino, an arylheteroarylamino, an alkyl, an alkoxy or an aryloxy, while at least one hydrogen atom in these may be substituted by an aryl, a heteroaryl or an alkyl, adjacent groups among R 1 to R 11 may be bonded to each other and form an aryl ring or a heteroaryl ring together with the ring a, ring b or ring c, at least one hydrogen atom in the ring thus formed may be substituted by an aryl, a heteroaryl, a diarylamino, a diheteroarylamino, an arylheteroarylamino, an alkyl, an alkoxy or an aryloxy, and at least one hydrogen atom in these substituents may be substituted by an aryl, a heteroaryl or an alkyl;

Y 1 represents B, P═O, or P═S;

when Y 1 represents B, each of X 1 and X 2 independently represents O, N—R, S or Se, wherein R of the moiety N—R represents an aryl having 6 to 12 carbon atoms, a heteroaryl having 2 to 15 carbon atoms, or an alkyl having 1 to 6 carbon atoms, R of the moiety N—R may be bonded to a carbon atom adjacent to the position (atom) of bonding to X 1 or X 2 in the ring a, ring b and/or ring c via —O—, —S—, —C(—R a ) 2 — or a single bond, wherein R 11 represents an alkyl having 1 to 6 carbon atoms, while the adjacent carbon atom is not a carbon atom that constitutes the central fused bicyclic structure of the said formula (1) composed of Y 1 , X 1 and X 2 ;

when Y 1 represents P═O or P═S, each of X 1 and X 2 independently represents O, S or Se, one of X 1 and X 2 represents O while the other represents S or Se, one of X 1 and X 2 represents N—R while the other represents Se, or one of X 1 and X 2 represents S while the other represents Se, wherein R of the moiety N—R represents an aryl having 6 to 12 carbon atoms, a heteroaryl having 2 to 15 carbon atoms, or an alkyl having 1 to 6 carbon atoms, R of the moiety N—R may be bonded to a carbon atom adjacent to the position (atom) of bonding to X 1 or X 2 in the ring a, ring b and/or ring c via —O—, —S—, —C(—R a ) 2 — or a single bond, wherein R a represents an alkyl having 1 to 6 carbon atoms, while the adjacent carbon atom is not a carbon atom that constitutes the central fused bicyclic structure of the said formula (1) composed of Y 1 , X 1 and X 2 ; and

at least one hydrogen atom in the compound represented by formula (2) may be substituted by a halogen atom or a deuterium atom.

21 . The material for an organic device described in claim 20 , wherein in formula (2),

each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 and R 11 independently represents a hydrogen atom, an aryl having 6 to 30 carbon atoms, a heteroaryl having 2 to 30 carbon atoms, or a diarylamino (provided that the aryl is an aryl having 6 to 12 carbon atoms), while adjacent groups among R 1 to R 11 are bonded to each other and form an aryl ring having 9 to 16 carbon atoms or a heteroaryl ring having 6 to 15 carbon atoms together with the ring a, ring b or ring c, and at least one hydrogen atom in the ring thus formed may be substituted by an aryl having 6 to 10 carbon atoms;

Y 1 represents B, P═O, or P═S;

when Y 1 represents B, each of X 1 and X 2 independently represents O, N—R or S, wherein R in the moiety N—R represents an aryl having 6 to 10 carbon atoms or an alkyl having 1 to 4 carbon atoms;

when Y 1 represents P═O or P═S, each of X 1 and X 2 independently represents O or S, one of X 1 and X 2 represents O while the other represents S, wherein R in the moiety N—R represents an aryl having 6 to 10 carbon atoms or an alkyl having 1 to 4 carbon atoms; and

at least one hydrogen atom in the compound represented by formula (2) may be substituted by a halogen atom or a deuterium atom.

22 . The material for an organic device described in claim 18 , wherein the halogen atom is a fluorine atom.

23 . The material for an organic device described in claim 18 , wherein the above formula (1) is represented by the following formula (1-1), the following formula (1-2), the following formula (1-4), the following formula (1-10), the following formula (1-49), the following formula (1-81), the following formula (1-91), the following formula (1-100), the following formula (1-141), the following formula (1-151), the following formula (1-176), the following formula (1-411), the following formula (1-447), the following formula (1-601), or the following formula (1-701):

24 . The material for an organic device described in claim 18 , wherein the above formula (1) is represented by the following formula (1-21), the following formula (1-23), the following formula (1-24), the following formula (1-50), the following formula (1-152), the following formula (1-201), the following formula (1-401), the following formula (1-422), the following formula (1-1048), the following formula (1-1049), the following formula (1-1050), the following formula (1-1069), the following formula (1-1084), the following formula (1-1090), the following formula (1-1092), the following formula (1-1101), the following formula (1-1102), the following formula (1-1103), the following formula (1-1145), the following formula (1-1152), the following formula (1-1159), the following formula (1-1187), the following formula (1-1190), the following formula (1-1191), the following formula (1-1192), the following formula (1-1201), the following formula (1-1210), the following formula (1-1247), the following formula (1-1250), the following formula (1-1251), the following formula (1-1252), or the following formula (1-1271):

25 . The material for an organic device described in claim 18 , wherein the above formula (1) is represented by the following formula (1-1-1), the following formula (1-79), the following formula (1-142), the following formula (1-152-2), the following formula (1-158), the following formula (1-159), the following formula (1-721), the following formula (1-1006), the following formula (1-1104), the following formula (1-1149), the following formula (1-1150), the following formula (1-1301), the following formula (1-1351), the following formula (1-2305), the following formula (1-2626), the following formula (1-2657), the following formula (1-2662), the following formula (1-2665), the following formula (1-2676), the following formula (1-2678), the following formula (1-2679), the following formula (1-2680), the following formula (1-2681), the following formula (1-2682), the following formula (1-2683), the following formula (1-2691), the following formula (1-2699), the following formula (1-3588), the following formula (1-3654), the following formula (1-3690), the following formula (1-3806), the following formula (1-3824), the following formula (1-4114), the following formula (1-4150), the following formula (1-4341), the following formula (1-4346), the following formula (1-4401), or the following formula (1-4421-1):

26 . The material for an organic device described in claim 18 , wherein the material for an organic device is a material for an organic electroluminescent element, a material for an organic field effect transistor, or a material for an organic thin film solar cell.

27 . The material for an organic electroluminescent element described in claim 26 , which is a material for a light emitting layer.

28 . The material for an organic electroluminescent element described in claim 26 , which is a material for an electron injection layer or a material for an electron transport layer.

29 . The material for an organic electroluminescent element described in claim 26 , which is a material for a hole injection layer or a material for a hole transport layer.