Khansa’s paper on organic solar cells has finally come out.  Khansa was able to show by  resonance Raman spectroscopy and time-dependent density functional theory (TD-DFT) that PM6 undergoes substantial photo-oxidation—specifically sulfur oxidation—resulting in energy level shifts, the formation of trap states, and molecular aggregation.  Thus degraded cell perfomance.  She was also able to compare rates […]