NOVELTY - Flavanthrene derivatives (I) are new.    USE - (I) are useful as charge transport, semiconducting, electrically conducting, photoconducting or light emitting material in an optical, electrooptical, electronic, electroluminescent or photoluminescent components or devices including organic field effect transistors, thin film transistors, integrated circuits, logic circuits, capacitors, radio frequency identification tags, devices or components, organic light emitting diodes, organic light emitting transistors, flat panel displays, back-lights of displays, organic photovoltaic devices, solar cells, laser diodes, photoconductors, photodetectors, electro photographic devices, electro photographic recording devices, organic memory devices, sensor devices, charge injection layers, charge transport layers or interlayers in polymer light emitting diodes, organic plasmon-emitting diodes, Schottky diodes, planarizing layers, antistatic films, polymer electrolyte membranes, conducting substrates, conducting patterns, electrode materials in batteries, alignment layers, biosensors, biochips, security markings and security devices, and components or devices for detecting and discriminating DNA sequences (all claimed).    ADVANTAGE - (I) provide good electronic properties, preferably high charge carrier mobility, good processability and high thermal and environmental stability to the devices.    DETAILED DESCRIPTION - Flavanthrene derivatives of formula (I) are new.    R1, R2 = 1-40C alkyl optionally substituted by one or more substituents of L, where one or more non-adjacent CH2 groups are optionally replaced by -O-, -S-, -NR1-, -SiR1R2-, -CY1=CY2- or -C=C-, O and S atoms are aryl or heteroaryl with 4-20 ring atoms which is unsubstituted or substituted by one or more groups L, and O and S atoms are not linked directly to one another;    X1-X6 = H or L;    L = P1-Sp-, F, Cl, Br, I, -OH, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, -C(=O)NR1R2, -C(=O)X1, -C(=O)R1, -NR1R2, C(=O)OH, optionally substituted silyl or germyl, optionally substituted aryl or heteroaryl having 4-20 ring atoms, alkyl which is optionally substituted by alkoxy, oxaalkyl or thioalkyl with 1-20, preferably 1-12C which is optionally substituted with one or more F or Cl atoms, OH or alkenyl, alkynyl, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 2-30, preferably 2-12C which is optionally substituted with one or more F, Cl or OH;    P1 = polymerizable;    Sp = spacer group or single bond;    X1 = halo;    R1, R2 = H or 1-20C alkyl; and    Y1, Y2 = H, F, Cl or CN.    An INDEPENDENT CLAIM is included for a formulation comprising (I), one or more organic binders or its having a permittivity epsilon at 1000 Hz of 3.3 or less, and optionally one or more solvents.