NOVELTY - Charge-transport material (I) comprises a coronene diimide charge-transport material monomer (II).    USE - (I) is used in: electroluminescent devices, photovoltaic cells, light-emitting diodes, field-effect transistors, phototransistors, radio-frequency ID tags, semiconductor devices, photoconductive diodes, metal-semiconductor junctions, p-n junction diodes, p-n-p-n switching devices, photodetectors, optical sensors, phototransducers, bipolar junction transistors, heterojunction bipolar translators, switching transistors, charge-transfer devices, thin film transistors, organic radiation detectors, infra-red emitters, tunable microcavities for variable output wavelength, telecommunicationsdevices and applications, optical computing devices, optical memory devices and/or chemical detectors (claimed). (I) is used as sensitizers.    DETAILED DESCRIPTION - Charge-transport material (I) comprises a coronene diimide charge-transport material monomer of formula (II).    Y1 = H, CN, acceptors, donors or polymerizable group;    X = X1, X2 or X3;    X1 = polymerizable group, 3,4,5-trialkoxyphenyl, 3,4,5-trialkylphenyl, 3,4,5-tri-perfluorinated-alkylphenyl, 3,4,5-tri-perfluorinated-aUcoxyphenyl, 3,4,5-tri-oligomeric-ether-substituted phenyl, 3,4,5-trialkoxybenzyl, 3,4,5-trialkylbenzyl; 3,4,5-tri-perfluorinated-alkyl benzyl, 3,4,54-tri-perfluorinatedalkoxy benzyl, 3,4,5-tri-oligomeric-ether-substituted benzyl, 3,4-dialkoxyphenyl, 3,4-dialkylphenyl, 3,4-di-perfluorinated-alkylphenyl, 3,4-diperfluorinated-alkoxyphenyl, 3,4-di-oligomeric-ether-substituted phenyl, 3,4-dialkoxybenzyl, 3,4-dialkylbenzyl, 3,4-di-perfluorinated-alkylbenzyl, 3,4-diperfluorinated-alkoxybenzyl, 3,4-di-oligomeric-ether-substituted benzyl, 3,5-dialkoxyphenyl, 3,5-dialkylphenyl, 3,5-di-perfluorinated-alkyl phenyl, 3,5-diperfluorinated-alkoxy phenyl, 3,5-di-oligomeric-ether-substituted phenyl, 3,5-dialkoxybenzyl, 3,5-dialkylbenzyl, 3,5-di-perfluorinated-alkyl benzyl, 3,5-dioligomeric-ether-substituted benzyl or substituted phenyl compound of formulae (1a-3a);    R = polymerizable group, alkyl, alkoxy, perfluorinated alkyl, perfluorinated alkoxy or oligomeric-ether (where R is dendritic units);    X2 = polymerizable group, H, halo, 1-18C alkyl, (hetero)aryloxy or (hetero)arylthio;    X2, Y1 = 1-10C-alkyl, 1-6C-alkoxy, CN or carboxyl;    X3 = e.g. polymerizable group, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, 2-methylpentyl, heptyl, 1-ethylpentyl, octyl, 2-ethylhexyl, isooctyl, nonyl, isononyl, decyl, isodecyl, undecyl, dodecyl, tridecyl, isotridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl and eicosyl, 2-methoxyethyl, 2-ethoxyethyl, 2-propoxyethyl, 2-isopropoxyethyl, 2-butoxyethyl, 2-methoxypropyl, 3-methoxypropyl, 2-ethoxypropyl, 3-ethoxypropyl, 2- propoxypropyl or 3-propoxypropyl; and    n = 0-20.    Full definitions are given in the DEFINITIONS (Full Definitions) Field. INDEPENDENT CLAIMS are included for:    (1) a polymer comprising a first monomer (A) (where X is X1); a second monomer (B) (where X is X2) and/or third monomer (C) (where X is X3);    (2) a homopolymer comprising (A); (B); and/or (C);    (3) a copolymer comprising (A); (B); and/or (C);    (4) a device comprising a polymer;    (5) a polymer layer comprising a layers, where layer is a monomer having central aromatic cores, where the central aromatic cores in the layers are stacked substantially over one another to form a one-dimensional charge transport column along the stacked central aromatic cores, where the monomer includes (A), (B) and (C);    (6) a device comprising a first electrode; a hole-transport layer disposed adjacent the first electrode; an electron-transport layer disposed adjacent the hole-transport layer, where the electron-transport material is (A), (B) and/or (C); and a second electrode disposed adjacent the electron-transport layer;    (7) a organic photovoltaic cell comprising: a first electrode; a hole-transport layer disposed adjacent the first electrode; an electron-transport layer disposed adjacent the hole-transport layer; an exciton blocking layer disposed adjacent the electron-transport layer; and a second electrode disposed adjacent the exciton blocking layer;    (8) a organic field-effect transistor comprising: a substrate; a gate electrode disposed on a first side of the substrate; a gate insulator disposed on a second side of the substrate; a source electrode disposed on a first portion of the gate insulator; a drain electrode disposed on a second portion of the gate insulator; and an electron-transport layer disposed on a third portion of the gate insulator, the source electrode, and the drain electrode; and    (9) a material comprising: a mixture of components comprising a monomer, a polymer including the monomer, a co-polymer including the monomer and/or a homopolymer including the monomer, where an amount of each monomer present in the mixture control at least one property (such as volatility, solubility, crystallinity, melting point, phase transitions, shelf life and/or charge transport ability) of the mixture.