TECHNOLOGY FOCUS - ELECTRONICS - Preferred Component: The photovoltaic component has continuous lamination of transparent electrode (2), electron accepting organic layer, electron donating organic layer containing polymeric material having repeating units of formula (I-III) and back electrode (5). Alternately, the photovoltaic component has continuous lamination of transparent electrode, translucent n-type inorganic semiconductor layer, electron accepting organic layer, electron donating organic layer containing polymeric material having repeating units of formula (I-III), and back electrode. Alternately, the photovoltaic component has sequential lamination of transparent electrode, electron accepting organic layer, electron donating organic layer (I), electron donating organic layer (II) containing polymeric material having repeating units of formula (I-III), and back electrode. Alternately, the photovoltaic component has continuous lamination of transparent electrode, translucent n-type inorganic semiconductor layer, electron accepting organic layer, electron donating organic layer (I), electron donating organic layer (II) containing polymeric material having repeating units of formula (I-III), and back electrode.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The polymeric material optionally further has repeating unit of formula (II and/or III).R1-R8,x,y=same as defined above;R9-R15=same as R1-R8;t,u,v=integer of 1-4;w=integer of 1-5;ands=integer of 1-3. Preferred Definitions:    R1-R8=H, halogen atom, (un)substituted linear or branched 1-25C alkyl, (un)substituted linear or branched 1-25C alkoxy or (un)substituted linear or branched alkylthio group which contains 1-25 carbon atoms on aromatic ring or saturated aromatic ring.    EXAMPLE - Dialdehyde (in g) (1.106), diphosphonate (1.681), tetrahydrofuran (80 ml), benzaldehyde (0.141) and tetrahydrofuran solution (8 ml) of potassium t-butoxide were stirred at room temperature for 2 hours. Subsequently, diethyl benzyl phosphonic acid (0.605) was added and stirred. The reaction was completed by adding acetic acid (1 ml). The reaction solution was water-washed, distilled and purified to obtain polymer of formula (A). The glass transition temperature, weight average molecular weight and number average molecular weight of the obtained polymer was 194.6degreesC, 17300 and 56000, respectively. Perylene tetracarboxylic acid methyl imide was vapor deposited on indium tin oxide glass to form electron accepting organic layer of 400 Angstrom thickness. Subsequently, 1 wt.% toluene solution of polymer of formula (A) was applied to form electron donating organic layer of 400 Angstrom thickness. Gold was vacuum-deposited on the electron donating organic layer to form electrode. A lead wire was attached to the electrodes, to form photovoltaic component. The photovoltaic component had high conversion efficiency.