Electrostatically self-assembled chitosan derivatives working as efficient cathode interlayers for organic solar cells

Chitosan and its derivatives were used as cathode interlayer materials in inverted organic solar cells (OSCs) by integrating electrostatic Layer-by-Layer (eLbL) self-assembly techniques. With the modification of chitosan eLbL films, inverted OSCs exhibited power conversion efficiency (PCE) of 9.34% with 100 nm active layer and 10.18% with 210 nm active layer.273