NOVELTY - Anthra(2,3-b:7,6-b')dithiophene derivative is new.    USE - As charge transport, semiconducting, electrically conducting, photoconducting or light emitting material in an optical, electrooptical, electronic, electroluminescent or photoluminescent components or devices (selected from organic field effect transistors (OFET), thin film transistors (TFT), integrated circuits (IC), logic circuits, capacitors, radio frequency identification (RFID) tags, devices or components, organic light emitting diodes (OLED), organic light emitting transistors (OLET), flat panel displays, backlights of displays, organic photovoltaic devices (OPV), solar cells, laser diodes, photoconductors, photodetectors, electrophotographic devices, electrophotographic recording devices, organic memory devices, sensor devices, charge injection layers, charge transport layers or interlayers in polymer light emitting diodes (PLEDs), organic plasmon-emitting diodes (OPEDs), Schottky diodes, planarising layers, antistatic films, polymer electrolyte membranes (PEM), conducting substrates, conducting patterns, electrode materials in batteries, alignment layers, biosensors, biochips, security markings, security devices, and components or devices for detecting and discriminating DNA sequences) (all claimed).    ADVANTAGE - The compound (I) possess increased photostability, improved organic solvent solubility, and higher melting point than analogous compounds with symmetrically substituted silylethynyl groups, thus yielding materials with improved thermal stability. The compounds (I) are easy to synthesize and exhibit several advantageous properties, such as high charge carrier mobility, high melting point, high solubility in organic solvents, good processability for the device manufacture process, high oxidative and photostability and long lifetime in electronic devices.    DETAILED DESCRIPTION - Anthra(2,3-b:7,6-b')dithiophene derivative of formula (I) is new.    Y1-Y4=-CH= or =CH-;    X=-O-, -S-, -Se- or -NR'x-;    A=C or Si;    R1,R2,R'x=H, F, Cl, Br, I, 1-20C alkyl (optionally substituted by L1 and where non-adjacent CH2 groups are optionally replaced, in each case from one another, by -O-, -S-, -NR1a-, -SiR1aR1b-, -CY1a=CY1b- or -C?=C- in such a manner that O and/or S atoms are not linked directly to one another), 4-20C aryl or 4-20C heteroaryl (both optionally substituted by L1);    R,R',R1c=1-20C alkyl, 1-20C alkoxy, 2-20C alkenyl, 2-20C alkynyl, 2-20C alkylcarbonyl, 4-20C (hetero)aryl, 4-20C (hetero)arylalkyl, 4-20C (hetero)aryloxy, or 4-20 (hetero)arylalkyloxy (all optionally substituted by L1) or H;    L1=P1-Sp1-, F, Cl, Br, I, -OH, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, -C(=O)NR1aR1b, -C(=O)X1a, -C(=O)R1a, -NR1aR1b, C(=O)OH, 4-20C (hetero)aryl (optionally substituted), or 1-20C (preferably 1-12C) alkyl (where at least one non-adjacent CH2 is optionally replaced, in each case from one another, by -O-, -S-, -NR1a-, -SiR1aR1b-, -CY1a=CY1b- or -C?=C- in such a manner that O and/or S atoms are not linked directly to one another and is optionally substituted by F or Cl atoms or OH);    P1=polymerizable group;    Sp1=spacer group or single bond;    X1a=halo;    R1a,R1b=H or 1-20C alkyl;    Y1a,Y1b=H, F, Cl or CN;    m,n=1 or 2.    Provided that one of Y1 and Y2 is -CH= or =CH- and the other of Y1 and Y2 is -X-; one of Y3 and Y4 is -CH= or =CH- and the other of Y3 and Y4 is -X-; where in at least one group ARR'R1a, at least two of the substituents R, R' and R1a are not identical. INDEPENDENT CLAIMS are included for the following:    (1) formulation comprising the compound (I) and at least one organic solvent;    (2) organic semiconducting formulation comprising the compound (I), at least one organic binder or its precursor, having a permittivity at 1000 Hz of less than or equal to 3.3, and optionally at least one solvent; and    (3) preparing the compound (I).