TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent is toluene, xylenes, anisole, tetrahydronaphthalene, chlorobenzene, o-dichlorobenzene, chlorobutane, dichloroethane, chloroform, trichloroethane and/or tetrachloroethane. The device further comprises: carbon nanotubes; a dielectric layer (14) that is provided between a substrate (16) and a semiconductor layer (12) and is surface modified with at least a hexamethyldisilazane, a phenyl trichlorosilane, a octyltrichlorosilane or a octadecyltrichlorosilane; and a unsubstituted fullerene or its derivative. The field-effect mobility is 10-3 to 10 cm2/(V.second).    TECHNOLOGY FOCUS - POLYMERS - Preparation (Disclosed): Preparation of the polymer comprises: brominating thiophene-containing Pechmann dye derivative of formula (III) using molecular bromine in the presence of trichloromethane to form dibromo compound of formula (IV); and polycondensation of (IV) with a bifunctional organotin or organoboron reagent that is substituted thiophene compound of formula (V) in the presence of palladium, optionally a solvent and base to give substituted 5-(2,2'-bithien-5-yl)-5'-thien-2-yl-2H,2'H-3,3'-bifuran-2,2'-dione units of formula (VI) (representative of (I)).R = alkyl, aryl, heteroaryl (all optionally substituted), H, alkoxy or alkylthio; andM = Sn(CH3)3, Sn(butyl)3, B(OH)2, 5-(4,4,5,5-tetramethyl-(1,3,2)dioxaborolan-2-yl) or 5-(1,3,2)dioxaborinan-2-yl.Preferred Components: The polymer comprises 0.1-2 wt.% of the composition. Preferred Definitions:    at least one of a, b and c = 1-5;    R4 = any one of 41 moieties e.g. -C(R)=C(R)-, ethynyl, substituted furan-2,5-diyl of formula (a1), substituted thiophene-2,5-diyl of formula (a2), substituted selenophene-2,5-diyl of formula (a3), substituted oxazole-2,5-diyl of formula (a4), substituted thiazole-2,5-diyl of formula (a5), substituted 4,6-dioxo-5,6-dihydro-4H-thieno(3,4-c)pyrrole-1,3-diyl of formula (a6), benzo(c)(1,2,5)thiadiazole-4,7-diyl, (1,2,5)thiadiazolo(3,4-c)pyridine-4,7-diyl, benzo(c)(1,2,5)oxadiazole-4,7-diyl, naphthalene-2,6-diyl, 1,4-phenylene, pyridine-2,5-diyl, thiazolo(5,4-d)thiazole-2,5-diyl, selenopheno(2,3-d)(1,3)selenazole-2,5-diyl and dibenzo(b,d)thiophene-3,7-diyl;    R3, R3 = any one of 38 moieties e.g. (a2)-(a6), benzo(c)(1,2,5)thiadiazole-4,7-diyl, (1,2,5)thiadiazolo(3,4-c)pyridine-4,7-diyl, benzo(c)(1,2,5)oxadiazole-4,7-diyl, naphthalene-2,6-diyl, 1,4-phenylene, pyridine-2,5-diyl, thiazolo(5,4-d)thiazole-2,5-diyl and dibenzo(b,d)thiophene-3,7-diyl; and    d = 1 or 2.    EXAMPLE - No suitable example given.