NOVELTY - Fused heterocyclic compounds (I) are new.    USE - (I) is useful: in electronic devices, preferably in organic electroluminescent devices, which are organic field-effect-transistors, organic thin film transistors, organic light emitting transistors, organic integrated circuits, organic solar cells, organic field-quench devices light emitting electro-chemical cells, organic photoreceptors or organic laser diodes; as hole transport material and/or hole injection material; as electron transport material and/or as hole blocking material for fluorescent and/or phosphorescent organic light-emitting diode and/or as triplet-matrix material for phosphorescent organic light-emitting diode (all claimed).    ADVANTAGE - (I) as hole transport material: needs less cutoff voltages compared to the compounds, which contain no R in the position described in (I) and/or no nitrogen in the indene-fluorene base; reduces the operating voltage of the organic electro luminescence device, so the overall efficiency of the organic light-emitting diode is increased; shows reduced voltage difference between thin (20 nm) and thick (110 nm) hole transport layers, so thick hole transport layers are used without a substantial loss of the power efficiency. In addition, (I) maintains good efficiency and life span of the device compared to the corresponding unsubstituted compounds.    DETAILED DESCRIPTION - Fused heterocyclic compounds of formula (I) are new.    Y1 = B, N, P, P=O, PF2, P=S, As, As=O, Sb, Sb=O, Bi, Bi=O, C=O, O, S, Se, Te, S=O, SO2, Se=O, SeO2, Te=O or TeO2;    Ar1 = aromatic or heteroaromatic ring system having 5-40 aromatic ring atoms, which are substituted with one or more R1;    X = B(R1), C(R1)2, -CR1=CR1-, -CR1=N-, -N=N-, Si(R1)2, C=O, C=NR1, C=C(R1)2, O, S, S=O, SO2, N(R1), P(R1), P(=O)R1 and/or P(=S)R1;    Z= C (when X is bonded on Z) or CR or N (when X is not bonded on Z);    W1 = CH or N;    R = H, D, F, CN, B(OR2)2, Si(R2)3, N(Ar1)2, C(=O)Ar1, P(=O)Ar2, S(=O)Ar, S(=O)2Ar, CR2=CR2Ar, straight chain alkyl-, alkoxy- or thioalkoxy group having 1-40C atoms or branched or cyclic alkyl-, alkoxy- or thioalkoxy group having 3-40C atoms, which are substituted with one or more R2, where one or more not adjacent CH2 groups are replaced by -R2C=CR2-, Si(R2)2, C=O, C=S, C=NR2, -O-, -S-, -COO- or -CONR2- and where one or more H atoms are replaced by F, Cl, Br, I, CN or NO2, or aromatic or heteroaromatic ring system having 5-40 aromatic ring atoms, which are substituted by one or more non-aromatic R1, or aryloxy- and/or heteroaryloxy group having 5-40 aromatic ring atoms, which are substituted by one or more non-aromatic R1, so that two or more neighboring substituents R form a mono- or polycyclic ring system;    E = single bond, N(R1), O, S, C(R1)2, C(R1)2-C(R1)2, Si(R1)2 or B(R1);    R1 = H, D, F, Cl, Br, I, CN, NO2, B(OR2)2, Si(R2)3, straight chain alkyl-, alkoxy- or thioalkoxy group having 1-40C atoms or branched or cyclic alkyl-, alkoxy- or thioalkoxy group having 3-40C atoms, which are substituted with one or more R2, where one or more not adjacent CH2 groups are replaced by -R2C=CR2-, Si(R2)2, C=O, C=S, C=NR2, -O-, -S-, -COO- or -CONR2- and where one or more H atoms are replaced by F, Cl, Br, I, CN or NO2, or aromatic or heteroaromatic ring system having 5-40 aromatic ring atoms, which are substituted by one or more non-aromatic R1, or aryloxy- and/or heteroaryloxy group having 5-40 aromatic ring atoms, which are substituted by one or more non-aromatic R1, so that two or more neighboring substituents R form a mono- or polycyclic ring system;    R2 = H or 1-20C aliphatic or aromatic hydrocarbon;    either m, n= 0 or 1; or    m+n = 1;    q = 1 (when the corresponding central atoms of Y1 is an element of third or fifth main group) or 0 (when the corresponding central atoms of Y1 is an element of fourth or sixth main group);    s = 1-3;    t = 0 or 1, where t is 0, which means that instead of E, R1 is bonded, and t is 0 when q is 0; and    v = 0 or 1.    Provided that R is not H or D, when Z is C, CR and/or N. An INDEPENDENT CLAIM is included for producing (I).