Patent ID: 8501901

Claim:
A material for a photovoltaic device comprising: an electron donating organic material having a structure represented by (1): wherein each of R 1 and R 2 , that may be the same or different, represents an optionally substituted aryl group provided that when a substituent is present, the substituent is an alkoxy group having 1 to 5 carbon atoms; each of R 3 through R 14 , that may be the same or different, represents hydrogen, an alkyl group, an alkoxy group, an aryl group, an heteroaryl group, or halogen; each of R 15 and R 16 , that may be the same or different, represents an alkyl group having 6 to 10 carbon atoms; X represents carbon or nitrogen; where X is nitrogen, no R 16 exists; and n represents 10 or more to 1000 or less.