(IMAGE) Institute of Science and Technology Austria Caption Examining a lead-halide perovskite crystal in the lab at ISTA using optical methods. The sample (center right) glows green. Credit © ISTA Usage Restrictions Free to use when reporting about ISTA 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.