High-Performance Polymer Solar Cells of an Alternating Polyfluorene Copolymer and a Fullerene Derivative


  • We thank Carl Tengstedt at Surface Physics and Chemistry, IFM, LiU for providing us with LiF. J. C. H. wishes to thank Dr. M. T. Rispens for the preparation of PCBM. We also thank the Swedish Research Council for financial support.


Solar cells prepared using the alternating copolymer shown in the Figure blended with a C60 derivative (PCBM) are demonstrated to have a high performance, with a power conversion efficiency of 2.2 % under simulated solar light. The molecular weight of the polymer is low due to limited solubility, and films of the polymer exhibit red-shifted absorption.