| abstract |
The present invention is a composition containing an electron donor polymer (D) and an electron acceptor polymer (A). The electron donor polymer (D) has a constituent unit represented by formula (1a). In formula (1a), Y 1a is a divalent group represented by formula (3a), and the electron acceptor polymer (A) has a constituent unit represented by formula (4a)(the symbols in the formulae are as described in the description). |