TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The electron-accepting compound is fullerene derivative. Preferred Compound: The cyclic compound (XI) or (XII) is preferably of formula (XIII) or (XIV).    TECHNOLOGY FOCUS - POLYMERS - Preparation (disclosed): Aromatic heterocyclic compound of formula (A) is subjected to oxidative polymerization in presence of catalyst, to obtain high molecular compound. Preferred Compound: The high-molecular compound further has structural units of formulae (II)-(VI), preferably (IIa)-(VIa). The structural unit (I) is preferably of formula (Ia).Q1-Q9=sulfur, oxygen, selenium, or -N(R30)- or -CR31=CR32-;R30-R32,R20-R25,R40-R49=H or substituent;or R20+R21,R40+R41,R42+R43=cyclic structure;andring G-ring N'=aromatic ring.Ring G is not benzene ring. Preferred Property: The high-molecular compound has weight average molecular weight of 3000 or more based on polystyrene conversion. Preferred Definitions:    X1=-O-.    EXAMPLE - 5,6-Difluoro-4,7-bis-(4,4,5,5-tetramethyl-(1,3,2)dioxaborolan-2-yl)-benzo(1,2,5)thiadiazole (in mg) (191.3), methylene chloride (24 mL) were mixed at room temperature, tris(dibenzylidene acetone)palladium (2.75), (tri(tert-butyl)phosphonium)tetrafluoroborate (3.48), potassium phosphate aqueous solution (2 mol/L) were added to the reaction mixture, stirring at 40 degrees C, methylene chloride (6 ml) solution of 4-(2-bromo-5,5-bis-(3,7-dimethyl-octyl)-5H-4-oxa-1,8-dithia-as-indacen-7-yl)-7-(2-bromo-5-nonyl-5-octyl-5H-4-oxa-1,8-dithia-as-indacen-7-yl)-5,6-difluoro-benzo(1,2,5)thiadiazole (63.6) was added to the reaction mixture, stirred for 30 minutes, phenyl boric acid (15) was added to the reaction liquid, stirred for 1 hour, reacted in argon atmosphere, sodium diethyldithiocarbamate (1 g) and pure water (10 mL) were added to the reaction liquid, stirred, refluxed for 3 hours, aqueous layer was removed, the organic layer was washed using water (50 ml) and acetic acid (50 mL), precipitated, and dried, to obtain polymer (50) having weight average molecular weight of 25000, number average molecular weight of 10000, and absorption edge wavelength of 940 nm.