NOVELTY - Oxocarbon, pseudooxocarbon, and radialene compounds; are new.    USE - Useful as doping agents in organic semiconductive material (claimed). The organic semiconductive materials are useful for forming electronic components e.g. light-emitting diodes (OLEDs), field effect transistors (FET), and solar cells.    ADVANTAGE - The oxocarbon, pseudooxocarbon and radialene compounds are useful as improved organic doping agents for doping organic semiconductive matrix material for changing its electrical properties, such as, as blocker material as well as charge injection layer and as electrode material or organic semiconductor itself. The previously described doping compounds have disadvantages for technical use in production of doped semiconductive organic layers or corresponding electronic components with such doped layers, since the manufacturing processes in large-scale production plants or those on a technical scale was not always be sufficiently precise, and resulted in high control and regulating expense within the processes for achieving a desired product quality or in undesired tolerances of products. Further, there are disadvantages in use of previously known organic donors with regard to electronic components such as light-emitting diodes (OLEDs), field effect transistors (FET) or solar cells themselves, since production difficulties in handling of doping agents can lead to undesired irregularities in electronic components or in undesired ageing effects of electronic components. The doping agents comprising the compounds (I) have extremely high electron affinities (reduction potentials) and other properties suitable for application, since doping agents also co-determine conductivity or other electrical properties of organic semiconductive layer under given conditions. The appropriate energetic positions of highest occupied molecular orbital (HOMO) of matrix material and lowest unoccupied molecular orbital (LUMO) of doping agent, result in desired doping effect. The organic mesomeric compounds (I) can be used as doping agent for doping of organic semiconductors, which can further be more readily handled in production process and result in electronic components whose organic semiconductive materials can be reproducibly manufactured. In the compounds position of LUMO is so low that further technically desired hole transport materials can now be efficiently doped for first time. Due to extremely low position of LUMO and to associated high reduction potential of compounds even performance efficiencies of solar cells can be significantly improved. In addition, these compounds are extremely diffusion-stable in organic layers on account of their high polarity. The production processes of the semiconductive materials using the compounds (I) can be better controlled and thus be carried out with lesser expense and in a more reproducible manner by higher evaporation temperature and lower volatility under same conditions. Thus by making available oxocarbons, pseudooxocarbons and radialenes as doping agents, a sufficient electrical conductivity of organic semiconductive matrix can be achieved, due to advantageous electron affinity of doping agents, in particular components at low diffusion coefficients that ensure component structure that is uniform in time. Further, charge carrier injection of contacts into doped layer can be improved by doping agents. The doped organic semiconductive material and resulting electronic component can have improved long-time stability on account of the compounds (I). This results in reduction of doping concentration over time, and further provides stability of doped layer that is arranged adjacent to non-doped layers of electro-optical component so that electro-optical components with increased long-time stability of electro-optical properties such as light yield at given length, or effectiveness of solar cell is obtained. The doping agent comprising compound (I) generates conductivity just as high as or preferably higher than tetrafluoro-tetracyanoquinodimethane (F4TCNQ) under conditions that are otherwise the same such as, in particular, doping concentration at a given matrix material e.g. a conductivity (s/cm) of greater than or equal to 1.1 to 1.5 times or twice that of F4TCNQ as doping agent is obtained.    DETAILED DESCRIPTION - Oxocarbon, pseudooxocarbon, or radialene compounds of formula (I), are new.    n=1-4;    X1 to X5=T1, T2, or T3;    T1, T2 and T3=e.g. C(CN)2, (CF3)(CN), or a group selected from T' groups;    T'=a group selected from groups of formulae (i) to (xvi), R1-C(=X4)-CH2-C(=X5)-R2, R1-C(=X4)-CH2-CN, (Het)aryl-CH2-(Het)aryl, (Het)aryl-CH2-Y1, R1-C(=X4)-CH2-CF3, (Het)aryl-O2S-CH2-CF3, or (Het)aryl-O2S-CH2-CN;    Y1=T1a, or T2a;    T1a=CN, COR1, or perhalogenated alkyl;    T2a=CN, NO2, COR1, or perhalogenated alkyl;    aryl=aromatic hydrocarbon, polycyclic hydrocarbon, or biaryl hydrocarbon (all optionally substituted);    Hetaryl and bihetaryl=aromatic heterocyclic compound, polynuclear compound, or partially or completely hydrogenated or partially or completely fluorinated heteroaromatic (all optionally substituted);    R1 to R8=T1b, or T2b;    T1b and T2b=e.g. H, halo, CN.    Provided that:    (1) when n is 1, then each X1 to X5 is selected from T1, Y1 is selected from T1a, R1 to R8 is selected from T1b, aryl of T1 is selected from aromatic hydrocarbon, polycyclic hydrocarbon, or biaryl hydrocarbon (all optionally substituted), and Hetaryl and bihetaryl of T1 are selected from aromatic heterocyclic compound, polynuclear compound, or partially or completely hydrogenated or partially or completely fluorinated heteroaromatic (all optionally substituted);    (2) when n is 2, then each X1 to X5 is selected from T2, Y1 is selected from T2a, R1 to R8 is selected from T2b, aryl of T2 is selected from aromatic hydrocarbon, polycyclic hydrocarbon, or biaryl hydrocarbon (all optionally substituted), and Hetaryl and bihetaryl of T2 are selected from aromatic heterocyclic compound, or polynuclear compound (both optionally substituted);    (3) the perhalogenated alkyl groups of T2a exclude the group CF3; and    (4) the compounds (I) exclude e.g. compounds in which n is 1, X1, X2, and X3 are group of formula (ii), X4 is O, R1 and R3 are H, and R2 and R4 are selected from CH3, C2H5, CH(CH3)2, or C(CH3)3.    Full Definitions are given in the DEFINITIONS (Full Definitions) section. An INDEPENDENT CLAIM is included for an organic semiconductive material comprising: at least one organic matrix compound and at least one doping agent, where the doping agent comprises at least one oxocarbon, pseudooxocarbon or radialene compound of formula (I).