Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics Academic Article uri icon


  • The principle remaining challenge in the research area of organic photovoltaic (OPV) materials is to develop solar cells that combine high efficiency, stability and reproducibility. Here, we demonstrate an experimental strategy which has successfully addressed this challenge. We produced a number of samples of the highly efficient PTB7 polymer with various molecular weights (Mn∼ 40–220k). OPV cells fabricated with this polymer demonstrated significant improvement of the cell efficiency (by∼ 90% relative) and …

publication date

  • January 1, 2016