Solar Cell Surface (IMAGE) University of Washington Caption Image of a perovskite solar cell, obtained by the team's improved method for electron imaging, showing individual grain structure. Credit Jariwala et al., <em>Joule</em>, 2019 Usage Restrictions Must include credit 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.