Solar cells Feng Gao and Rui Zhang (IMAGE) Linköping University Caption Professor Feng Gao and postdoctor Rui Zhang, Linkoping University. Credit Olov Planthaber Usage Restrictions none 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.