Chongqing Institute of Green and Intelligent Technology;
Chongqing School;
University of Chinese Academy of Sciences(UCAS Chongqing);
Chinese Academy of Sciences;
Chongqing;
400714;
PR China;
Chongqing University;
Chongqing;
400044;
PR China;
Department of Electronic and Information Engineering;
The Hong Kong Polytechnic University;
Hong Kong SAR;
PR China;
Organic solar cell; Small-molecule donor; Side-chain modification; Molecular dipole moment; Morphology;