Perovskite Solar Cell Prototype (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption Perovskite Solar Cell Prototype Credit Alain Herzog / EPFL Usage Restrictions Copyright mention. 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.