Shanghai Synchrotron Radiation Facility;
Shanghai Institute of Applied Physics;
Chinese Academy of Sciences;
Shanghai 201204;
China;
Shanghai Advanced Research Institute;
Chinese Academy of Sciences;
Shanghai 201210;
China;
CAS Key Laboratory of Bio-Based Materials;
Qingdao Institute of Bioenergy and Bioprocess Technology;
Chinese Academy of Sciences;
Qingdao 266101;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
Functional Laboratory of Solar Energy;
Shandong Energy Institute;
Qingdao 266101;
China;
College of Materials Science and Engineering;
Xiangtan University;
Xiangtan 411105;
China;
Grazing incidence wide-angle X-ray scattering; Grazing incidence small-angle X-ray scattering; Organic solar cells; Solvent additive; Thermal stability;