NOVELTY - Electroluminescent device comprises at least one fluorene derivative (I).    USE - The fluorene derivative (VII) is useful in an electronic device, preferably 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 and organic light emitting diode (all claimed). The electroluminescent device is useful in displays, as light sources in lighting applications and as light sources in the medical and/or cosmetic applications.    ADVANTAGE - The fluorene derivative (I) or (VII) exhibits low sublimation temperature, high temperature stability, high oxidation stability, high glass transition temperature and low crystallinity, and thus it provides improved efficiency, long life and low operating voltage to the electronic device.    DETAILED DESCRIPTION - Electroluminescent device comprises at least one fluorene derivative of formula (I).    either p, r, s = 0 or 1 (preferred); and    q = 0 or 1or    p+q+r+s = 1;    Z1-Z4 = R4 or -B1-N(Ar1)(Ar2);    B1 = single bond, bivalent 6-30C aryl, bivalent heteroaryl with 5-30 ring atoms, which are respectively substituted with R6, where B1 is single bond, the N is directly connected to fluorene;    Ar1, Ar2 = (hetero)aryl with 10-60 ring atoms, which may be substituted with at least one R5, where (a) both Ar1 and Ar2 comprise at least two (hetero)aromatic rings, which may be fused, (b) two of (hetero)aromatic rings in Ar1 and Ar2 are respectively bridged by bivalent -O-, -S-, -Si(R5)2-,-C(R5)2, or -NR5-, and unbridged rings are preferred, (c) (hetero)aromatic ring of Ar1 is bridged with (hetero)aromatic ring of Ar2 by bivalent O-, -S-, -Si(R5)2-, -NR5 or -C(R5)2-, and unbridged groups of Ar1 and Ar2 are preferred;    R1-R5 = H, D, F, Cl, Br, I, C(=O)R6, CN, Si(R6)3, NO2, N(R6)2, P(=O)(R6)2, S(=O)R6, S(=O)2R6, linear 1-20C alkyl, linear 1-20C alkoxy, linear 1-20C thioalkyl, branched or cyclic 3-20C alkyl, branched or cyclic 3-20C alkoxy, branched or cyclic 3-20C thioalkyl, 2-20C alkenyl, 2-20 C alkynyl (where (ai) the above mentioned groups are substituted with at least one R6, (bi) at least one CH2 in the above-mentioned groups is replaced by -R6C=CR6-, -CC-, Si(R6)2, C=0, C=S, C=NR6, -C(=O)O-, -C(=O)NR6-, P(=O)(R6), -O-, -S-, SO or SO2, (ci) at least one H is replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 6-30 aromatic ring atoms, aryloxy with 5-60 aromatic ring atoms or aralkyl with 5-60 aromatic ring atoms (which are respectively substituted with R6); either    R6 = H, D, F, Cl, Br, I, C(=O)R7, CN, Si(R7)3, NO2, P(=O)(R7)2, S(=O)R7, S(=O)2R7, N(R7)2, linear 1-20C alkyl-, linear 1-20C alkoxy, linear 1-20C thioalkyl, branched or cyclic 3-20C alkyl, branched or cyclic 3-20C alkoxy, branched or cyclic 3-20C thioalkyl, 2-20C alkenyl, 2-20C alkynyl (where (ai) the above mentioned groups are substituted with at least one R6, (bi) at least one CH2 groups in the above mentioned groups are replaced by -R7C=CR7-, -CC-, Si(R7)2, C=0, C=S, C=NR7, -C(=O)O-, -C(=O)NR7-, P(=O)(R7), -O-, -S-, SO or SO2, (ci) at least one H is replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 5-30 aromatic ring atoms, (hetero)aryloxy with 5-60 aromatic ring atoms (which are respectively substituted with R7); or    2R6 = mono- or polycyclic ring; either    R7 = H, D, F, aliphatic 1-20C hydrocarbon or 5-30C (hetero)aromatic ring, where at least one H may be replaced by D or F; or    2R7 = mono-or polycyclic ring.    INDEPENDENT CLAIMS are also included for:    (1) a fluorene derivative of formula (VII); and    (2) producing (VII) by Buchwald coupling.    R8 = H, D, F, Cl, Br, C(=O)R9, CN, Si(R9)3, NO2, N(R9)2, P(=O)(R9)2, S(=O)R9, S(=O)2R9, linear 1-20C alkyl, linear 1-20C alkoxy, linear 1-20C thioalkyl, branched or cyclic 3-20C alkyl, branched or cyclic 3-20C alkoxy, branched or cyclic 3-20C thioalkyl, 2-20C alkenyl, 2-20 C alkynyl (where (aii) the above mentioned groups are substituted with at least one R9, (bii) at least one CH2 in the above mentioned groups are replaced by -R9C=C R9-, -CC-, Si(R9)2, C=0, C=S, C=NR9, -C(=O)O-, -C(=O)NR9-, P(=O)(R9), -O-, -S-, SO or SO2, (cii) at least one H is replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 6-30 aromatic ring atoms, aryloxy with 5-60 aromatic ring atoms or aralkyl with 5-60 aromatic ring atoms (which are respectively substituted with R9); either    R9 = H, D, F, Cl, Br, I, C(=O)R10, CN, Si(R10)3, NO2, P(=O)(R10)2, S(=O)R10, S(=O)2R10, N(R7)2, linear 1-20C alkyl-, linear 1-20C alkoxy, linear 1-20C thioalkyl, branched or cyclic 3-20C alkyl, branched or cyclic 3-20C alkoxy, branched or cyclic 3-20C thioalkyl, 2-20C alkenyl, 2-20C alkynyl (where (aiii) the above mentioned groups are substituted with at least one R10, (biii) at least one CH2 in the above mentioned groups are replaced by -R10C=CR10-, -CC-, Si(R7)2, C=0, C=S, C=NR10, -C(=O)O-, -C(=O)NR10-, P(=O)(R10), -O-, -S-, SO or SO2, (ciii) at least one H is replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 5-30 aromatic ring atoms, (hetero)aryloxy with 5-60 aromatic ring atoms (which are respectively substituted with R10); or    R9 = mono- or polycyclic ring; either    R10 = R7; or    2R10 = mono- or polycyclic ring.