lab shot (IMAGE) Rice University Caption A process developed by Rice engineers and collaborators yields 2D halide perovskite crystal layers of ideal thickness and purity through dynamic control of the crystallization process ⎯ a key step toward ensuring device stability for optoelectronics and photovoltaics. Credit (Photo by Jeff Fitlow/Rice University) Usage Restrictions Must credit Jeff Fitlow/Rice University. 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.