Thin Film LED (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Applying mechanical strain on this atomically thin, transparent monolayer semiconductor results in a material with near 100% light-emission efficiency. Credit Ali Javey/Berkeley Lab Usage Restrictions Credit Ali Javey/Berkeley Lab 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.