NOVELTY - Substituted benzindenofluorene compounds (I) are new.    USE - (I) are useful: in an electronic device comprising organic integrated circuits, organic field effect transistors, 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 and organic electroluminescent devices; and as a hole transport material in a hole transporting layer, as emitting compound in an emitting layer or as a matrix compound in an emitting layer (all claimed).    ADVANTAGE - (I) provide electronic devices with excellent performance such as low operating voltage, long life and high power efficiency.    DETAILED DESCRIPTION - Substituted benzindenofluorene compounds of formula (I) are new.    Ar1 = 6-18 membered (hetero)aryl (optionally substituted with at least one R1);    Ar2 = 6 membered (hetero)aryl (optionally substituted with at least one R2); either    R1-R3 = linear 1-20C-alkyl or alkoxy, branched or cyclic 3-20C-alkyl or alkoxy, 2-20C-alkenyl or alkynyl (all optionally substituted with at least one R4, where one or more CH2 groups are optionally replaced by -(R4)C=C(R4)-, -CC-, Si(R4)2, C=O, C=NR4, -C(=O)O-, -C(=O)N(R4)-, N(R4), P(=O)(R4), -O-, -S-, SO or SO2) or 5-30 membered (hetero)aryl (optionally substituted with at least one R4), H, D, F, Cl, Br, I, C(=O)R4, CN, Si(R4)3, N(R4)2, P(=O)(R4)2, OR4, S(=O)R4 or S(=O)2R4; and    R4 = linear 1-20C-alkyl or alkoxy, branched or cyclic 3-20C-alkyl or alkoxy, 2-20C-alkenyl or alkynyl (all optionally substituted with at least one R5, where one or more CH2 groups are optionally replaced by -(R5)C=C(R5)-, -CC-, Si(R5)2, C=O, C=N(R5), -C(=O)O-, -C(=O)N(R5)-, N(R5), P(=O)(R5), -O-, -S-, SO or SO2), 5-30 membered (hetero)aryl (optionally substituted with at least one R5), H, D, F, Cl, Br, I, C(=O)R5, CN, Si(R5)3, N(R5)2, P(=O)(R5)2, OR5, S(=O)R5 or S(=O)2R5; and    R5 = 1-20C-aliphatic or (hetero)aromatic organic radical (where one or more H atoms are optionally replaced by D or F), H, D or F; or    two or more R3 or R4 or R5 bonded together = a ring; and    X1 = BR3, C(R3)2, -C(R3)2-C(R3)2-, -C(R3)2-O-, -C(R3)2-S-,-(R3)C=C(R3)-, -(R3)C=N-, Si(R3)2, -Si(R3)2-Si(R3)2-, C=O, O, S, S=O, SO2, NR3, PR3 or P(=O)R3.    Where at least one or two groups of Ar1 must contains greater than or equal to 10 aromatic ring atoms. When one of two groups of Ar1 is phenyl, then the other group should not contain more than 14 aromatic ring atoms. INDEPENDENT CLAIMS are included for:    (1) oligomers, polymers or dendrimers containing one or more (I);    (2) formulation comprising (I) or their oligomers, polymers or dendrimers, and at least one solvent;    (3) an electronic device comprising organic integrated circuits, organic field effect transistors, 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, and organic electroluminescent devices, comprising (I) or their oligomers, polymers or dendrimers; and    (4) the preparation of (I).