Manipulating Film Morphology of All-Polymer Solar Cells by Incorporating Polymer Compatibilizer

作者：Zhong, Wenkai; Hu, Qin; Ying, Lei^*; Jiang, Yufeng; Li, Kang; Zeng, Zhaomiyi; Liu, Feng^*; Wang, Cheng^*; Russell, Thomas P.^*; Huang, Fei^*; Cao, Yong

来源：Solar RRL, 2020, 4(7): 2000148.

DOI：10.1002/solr.202000148

• all-polymer solar cells
• compatibilizers
• film morphologies
• ternary organic solar cells

Morphology control in multiblend all-polymer solar cells is crucial for improving charge generation processes. Herein, it is demonstrated that the film morphology of the light-harvesting layer of all-polymer solar cells can be manipulated by incorporating a copolymer as the compatibilizer. Through in situ grazing-incidence wide-angle X-ray scattering characterization, the insights of the crystallization kinetics of the polymer blends from solution to thin-film state are provided. Of particular importance is that by kinetic and thermodynamic control of the film-processing conditions, an optimal morphology with appropriate nanoscale fibrillar structure in a well-mixed matrix is achieved. These findings indicate that the interplay between the crystalline regions and weakly/noncrystalline regions that are induced by the compatibilizer polymer plays a critical role in determining the morphology in multicomponent blend all-polymer solar cells.

• 单位
  上海交通大学