A Visual Summary of the Study (image) Ecole Polytechnique Fédérale de Lausanne Share Print E-Mail Caption This is a schematic representation of the findings of this study. Credit MK Nazeeruddin/EPFL Usage Restrictions Media purposes only. Please mention credit. Share Print E-Mail 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.