Microscopy -- Breaking the Time Barrier (IMAGE) DOE/Oak Ridge National Laboratory Caption ORNL researchers demonstrated ultrafast mapping of surface voltage dynamics because of ion migration induced by an electric field in a perovskite solar-cell device. Credit Liam Collins/Oak Ridge National Laboratory, US Dept. of Energy Usage Restrictions None 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.