Device Structure for ESR (IMAGE) University of Tsukuba Caption Schematic structure of electrical contacts and wires of the perovskite solar cell in an ESR sample tube. Credit University of Tsukuba Usage Restrictions Unauthorized use is prohibited. 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.