Photodetector structure and mechanism (IMAGE) Optica Caption The (a) schematic structure and (b) the working mechanism of the photodetector made from recycled PbI2 microcrystals is shown. The photodetector showed excellent stability, repeatability and fast response speeds. Credit Longxing Su, Southern University of Science and Technology 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.