supported by the 973 Programs (2011CB935702 and 2009CB623603);the NSF of China(Nos. 20834006, 51003006 and 21161160443);the Fundamental Research Funds for the Central Universities
6,7-Dialkoxy-2,3-diphenylquinoxaline based narrow band gap conjugated polymers, poly[2,7-(9-octyl-9H- carbazole)-alt-5,5-(5,8-di-2-thinenyl-(6,7-dialkoxy-2,3-diphenylquinoxaline))] (PCDTQ) and poly[2,7-(9,9-d...