SOLAR 3 (IMAGE) Rice University Caption Rice University graduate student Wenbin Li prepares a 2D perovskite solar cell for testing in a solar simulator. Rice engineers boosted the efficiency of cells made of two-dimensional perovskites while retaining their toughness. Credit Jeff Fitlow/Rice University Usage Restrictions None License Original 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.