(IMAGE) Nara Institute of Science and Technology Caption Improvements in the device performance by addition of a solvent additive A and B (left). Photocurrent flowing in the polymer solar cells, which is visualized at nanometer scale by PC-AFM (right). Credit Hiroaki Benten Usage Restrictions Credit required License Original 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.