NOVELTY - Polycyclic compounds (I) are new.    USE - (I) are useful in an electronic device including organic integrated circuits, organic FET, organic thin film transistors, organic light-emitting transistors, organic solar cells, organic optical detectors, organic photoreceptors, organic field-quench devices, organic light-emitting electrochemical cells, organic laser diodes or organic electroluminescent devices, and in oligomer, polymer or dendrimer (all claimed).    ADVANTAGE - (I) improve performance, service life and efficiency of the electronic device.    DETAILED DESCRIPTION - Polycyclic compounds of formula (I) are new.    Y1 = N or CR1, where at least two groups of Y1 in the six-membered ring are equal to N;    Z = equal to CR1 or N;    V1 = equal to CR2 or N;    Ar1, Ar2 = aryl or heteroaryl ring system having 6-40 aromatic ring atoms, which are substituted with one or more groups R1;    R1 = C(=O)R3, CN, Si(R3)3, N(R3)2, P(=O)(R3)2, S(=O)R3, S(=O)2R3, linear 1-20C-alkyl or -alkoxy, branched or cyclic 3-20C-alkyl or -alkoxy, 2-20C-alkenyl or -alkynyl (all substituted with one or more residues of R3), H, D, F, Br, Cl, I, where one or more CH2 groups mentioned in the above groups are replaced by -R3C=CR3-, -CC-, Si(R3)2, C=O, C=NR3, -C(=O)O-, -C(=O)NR3-, NR3, P(=O)(R3), -O-, -S-, SO or SO2, aryl or heteroaryl ring system having 5-30 aromatic ring atoms that are substituted by one or more groups of R3, or aryloxy or heteroaryloxy having 5-30 aromatic ring, which is substituted by one or more groups of R3, where two or more radicals of R1 are linked to form a ring;    R2 = C(=O)R3, CN, Si(R3)3, N(R3)2, P(=O)(R3)2, S(=O)R3, S(=O)2R3, linear 1-20C-alkyl or -alkoxy, branched or cyclic 3-20C-alkyl or -alkoxy, 2-20C-alkenyl or -alkynyl (all substituted with one or more residues of R3), H, D, F, Br, Cl, I, where one or more CH2 groups mentioned in the above groups are replaced by -R3C=CR3-, -CC-, Si(R3)2, C=O, C=NR3, -C(=O)O-, -C(=O)NR3-, NR3, P(=O)(R3), -O-, -S-, SO or SO2, aryl or heteroaryl ring system having 5-30 aromatic ring atoms that are substituted by one or more groups of R3, or aryloxy or heteroaryloxy having 5-30 aromatic ring, which is substituted by one or more groups of R3;    R3 = C(=O)R4, CN, Si(R4)3, N(R4)2, P(=O)(R4)2, S(=O)R4, S(=O)2R4, linear 1-20C-alkyl or -alkoxy, branched or cyclic 3-20C-alkyl or -alkoxy, 2-20C-alkenyl or -alkynyl (all substituted with one or more residues of R4), H, D, F, Br, Cl, I, where one or more CH2 groups mentioned in the above groups are replaced by -R4C=CR4-, -CC-, Si(R4)2, C=O, C=NR4, -C(=O)O-, -C(=O)NR4-, NR4, P(=O)(R4), -O-, -S-, SO or SO2, aryl or heteroaryl ring system having 5-30 aromatic ring atoms that are substituted by one or more groups of R4, or aryloxy or heteroaryloxy having 5-30 aromatic ring, which is substituted by one or more groups of R4, where two or more radicals of R3 are linked to form a ring;    R4 = H, D, F or aliphatic, aryl or 1-20C-heteroaryl organic group, in which one or more H atoms are replaced by D, or F, where two or more substituents of R4 are linked together to form a ring; and    n, m = 0 or 1, provided that when n is 0, then less than two Y1 groups (preferably N) are present, where the two nitrogens are positioned in the meta position of the six-membered ring.    INDEPENDENT CLAIMS are included for:    (1) an oligomer, polymer or dendrimer comprising (I), where the bond(s) is/are localized to the polymer, oligomer or dendrimer, in formula (I) having R1 or R2 substituted positions;    (2) a formulation comprising (I), the polymer, oligomer or dendrimer, and at least one solvent; and    (3) an electronic device comprising (I).