NOVELTY - Oligocondensed perylene bisimides (A), comprising two outer moieties (Ia) or one outer moiety (Ia) and one outer moiety (Ib) and inner moieties (Ic) or (Id), are new.    USE - (A) are useful: as semiconductor; in organic electronics, especially in organic field-effect transistors, organic light-emitting diodes or in solar cells; for optical labels, for invisible marking of products and as pigments; in a light-collecting plastics component which is, if appropriate, combined with a solar cell; and as a pigment dye in electrophoretic displays. (A) are useful: for coloring organic and inorganic materials; for obtaining markings and inscriptions which absorb infrared light but are invisible to the human eye; and as infrared absorbers for heat management (all claimed). (A) are useful: for preparing aqueous polymer dispersions which absorb in the near infrared region of electromagnetic spectrum; as active components in photovoltaics; as fluorescence emitters in organic light-emitting diodes; in displays which switch colors on and off based on an electrophoretic effect via charged pigment dyes; in a light-collecting plastics part; in chemoluminescence applications; and in physical vapor deposition process. (A) are useful: as coatings, printing inks and plastics; in dye-sensitized solar cells; for preparing integrated circuits for which the n-channel metal oxide semiconductor field-effect transistors customary to date are used; in displays (especially large-area and/or flexible displays) and radio-frequency identification tags; and for data storage, as UV absorbers, as optical brighteners and as invisible labels. The semiconductor component is useful in electronic components e.g. bipolar junction transistors, tunnel diodes, converters, biological and chemical detectors or sensors, temperature-dependent detectors, photodetectors such as polarization-sensitive photodetectors, gates, AND, NAND, NOT, OR, TOR and NOR gates, inverters, registers, switches, timer units, static or dynamic stores and other dynamic or sequential, logical or other digital components including programmable circuits.    ADVANTAGE - (A) have high charge transport mobility and high on/off ratio.    DETAILED DESCRIPTION - Oligocondensed perylene bisimides (A), comprising two outer moieties of formula (Ia) or one outer moiety (Ia) and one outer moiety of formula (Ib) and n inner moieties of formula (Ic) or (Id), are new.    R1a, R1b = alkyl, alkenyl, alkadienyl, alkynyl, cycloalkyl, bicycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl (all optionally substituted) or H;    n = 0-6; either    R1 = H, alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl or polycyclyl; or    R1R1 = divalent bridging group X between two moieties of (Ia), where X has 1-20 bridge atoms between the flanking bonds; and    R2, R3 = H, alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl or halo.    INDEPENDENT CLAIMS are included for:    (1) the preparation of (A);    (2) an organic field-effect transistor comprising a substrate having at least one gate structure, a source electrode and a drain electrode and at least one oligocondensed perylene bisimide (A) as a semiconductor;    (3) a substrate having a multitude of organic field-effect transistors, at least some of the field-effect transistors comprising at least one oligocondensed perylene bisimide (A) as a semiconductor; and    (4) a semiconductor component comprising at least one substrate.