School of Materials Science and Engineering;
and Tianjin Key Laboratory of Molecular Optoelectronic Science;
Tianjin University;
Tianjin 300072;
China;
Joint School of National University of Singapore and Tianjin University;
International Campus of Tianjin University;
Binhai New City;
Fuzhou 350207;
China;
Collaborative Innovation Center of Chemical Science and Engineering(Tianjin);
Tianjin 300072;
China;
Institute of High Energy Physics;
Chinese Academy of Sciences;
Beijing 100049;
China;
all-polymer solar cells; poly(3-hexylthiophene); polymer acceptors; energy levels; film morphology;