NOVELTY - Quinone derivatives (I), are new.    USE - The quinone derivatives are useful as a doping agent: in organic electronics; for organic semiconducting materials, preferably as a p-type doping agent for a hole conductor material; and in organic photovoltaics, preferably as a doping agent for a charge transport material. The quinone derivatives are useful: in organic light emitting diodes and hole conducting layers, which are useful in stationary screens e.g. computer or television screens, screens in printers, cooking devices and billboards, lighting, information boards and mobile screens e.g. screens in cell phones, laptops, digital cameras, vehicles and destination displays on bus and train; and in organic field-effect transistors and organic solar cells (all claimed).    ADVANTAGE - The quinone derivatives: exhibits high thermal stability; and can sublimate at high temperatures; are completely free from halogen, and thus avoids the migration of the quinone derivatives into adjacent undoped layers. The electronic components based on the quinone derivatives exhibit improved life time.    DETAILED DESCRIPTION - Quinone derivatives of formula (I), are new.    Either at least 1-3 (preferably 2) of R1-R4 = CN or phthalimide moiety of formula (II); or    R1-R4 = alkyl, alkoxy, alkylamino, alkylthio, alkylsulfinyl, alkylsulfonyl, alkenyl, alkadienyl, alkynyl, cycloalkyl, bicycloalkyl, cycloalkenyl, heterocycloalkyl or (hetero)aryl (all optionally substituted), H, F, Cl, Br, CN, NO2, nitroso, formyl, acyl, COOH, carboxylate, alkylcarbonyloxy, carbamoyl, SO3H, sulfonate, sulfamino, sulfamide, amidino or NE3E4, preferably not halo; or    R1+R2, R3+R4 = form fused ring system with 1-3 additional rings;    E3-E4 = H, (cyclo)alkyl or aryl;    R5-R8 = alkyl, alkoxy, alkylamino, alkylthio, alkylsulfinyl, alkylsulfonyl, alkenyl, alkadienyl, alkynyl, cycloalkyl, bicycloalkyl, cycloalkenyl, heterocycloalkyl or (hetero)aryl (all optionally substituted), H, F, Cl, Br, CN, NO2, nitroso, formyl, acyl, COOH, carboxylate, alkylcarbonyloxy, carbamoyl, SO3H, sulfonate, sulfamino, sulfamide, amidino or NE1E2, preferably not halo; and    E1-E2 = H, (cyclo)alkyl or aryl; and    two adjacent R5-R8 = form fused ring system with 1-3 additional rings.    INDEPENDENT CLAIMS are also included for:    (1) preparation of (I);    (2) an organic field-effect transistor comprising a substrate with at least one Gate structure, a source-electrode and a drain-electrode and at least one compound of (I) as a doping agent; and    (3) a substrate comprising the many organic field-effect transistors, where at least a part of the field-effect transistor contains at least one compound of (I) as a doping agent.