TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The solid layer further contains fullerene (derivative).    TECHNOLOGY FOCUS - POLYMERS - Preparation (claimed): The new polymer is obtained by reacting a distannyl-dithiatricyclo-dodeca-pentaene-diol derivative of formula (II) with compound (III or IV). EXAMPLE - Sulfuric acid (0.1 mL) was added to a liquid mixture of cyanoacetic acid (in g) (5), toluene (70 mL), and n-dodecanol (10.95), and refluxed for 24 hours. After solvent distillation, the residue was purified using ethyl acetate/hexane to obtain dodecyl cyanoacetate (10.5) as colorless liquid with a yield of 71%. A liquid mixture of 2,5-dibromo-3-thiophene carbaldehyde (1), the obtained compound (0.95), piperidine (5 mu l), and ethanol (10 mL) was refluxed for 1 hour. The temperature was reduced to room temperature and the deposited solid was filtered. The solid was washed with cold methanol, to obtain dodecyl 2-cyano-3-(2,5-dibromothiophene-3-yl)acrylate (1.37) as yellow solid with a yield of 73%. 2,6-Bis(trimethylstannyl)-4,8-bis(2-ethylhexyloxy)benzo(1,2-b:4,5-b')dithiophene (386 mg), the obtained compound (253 mg), and tetrakis(triphenylphosphine)palladium (25 mg) were mixed and dried for 10 minutes in vacuum. Toluene (8 mL) and N,N-dimethylformamide (2 mL) were added. After bubbling the mixed solution with argon gas for 10 minutes, the mixture was stirred at 120 degrees C for 7 hours. The temperature was reduced to room temperature, the reaction mixture was reprecipitated with hexane, and the precipitate was filtered. The obtained solid substance was dissolved in tetrahydrofuran and purified. After solvent distillation, a solid substance was filtered as polymer (0.3) as brown solid with a yield of 75%. The obtained polymer had a weight average molecular weight of 288000, a molecular weight distribution of 2.32, a lambda max value of 545 nm when in the form of chloroform solution and 551 nm when in the form of a film, and a thermal decomposition temperature of 280 degrees C.