crystal structure of the perovskite (IMAGE) DOE/Argonne National Laboratory Caption Illustration of the crystal structure of the perovskite. The molecules rotate about their hinges in two dimensions, which could explain the material's photovoltaic abilities. Credit (Image by Jill Hemman, Oak Ridge National Laboratory.) 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.