Dye molecules improve organic solar cells (IMAGE) Max Planck Institute for Polymer Research Caption Dye molecules in modern organic solar cells led to a two-fold improvement of organic solar cell efficiency as compared to the widely used fullerenes. Credit MPI-P Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.