Morphological Control for Highly Efficient Inverted Polymer Solar Cells Via the Backbone Design of Cathode Interlayer Materials.

Two alcohol‐soluble organic molecules are synthesized and introduced into inverted organic solar cells as the cathode interlayer. A power conversion efficiency as high as 9.22% is obtained by using the more hydrophobic molecule FTBTF‐N as the cathode interlayer. Morphological studies suggest that design of the backbone can help to enhance short‐circuit current density and fill factor. [ABSTRACT FROM AUTHOR]