Solar Cell Efficiency (IMAGE) University of Washington Caption The thin lines show the grain structure of a perovskite solar cell obtained using a new type of electron backscatter diffraction. Researchers can use a different technique to map sites of high energy loss (dark purple) and low energy loss (yellow). 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.