| abstract |
An electron-donating organic material for photovoltaic devices which contains a conjugated polymer represented by the general formula (1) is useful in providing photovoltaic devices having high photoelectric conversion efficiency. wherein R1 to R10 may be the same or different and are selected from among hydrogen, alkyl, alkoxy and aryl; R11 and R12 may be the same or different and are selected from among hydrogen, alkyl, aryl, heteroaryl, and halogeno; W, X, Y and Z may be the same or different and are selected from among single bond, arylene, heteroarylene, ethenylene and ethynylene; and m is 0 or 1 and n is 1 to 1000. |