Perovskite Solar Cells in the Lab (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption Perovskite solar cells in the lab. Credit Wolfgang Tress (EPFL) Usage Restrictions Media purposes only. Commercial usage restricted; by permission only. 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.