SOLAR 1 (IMAGE) Rice University Caption A two-dimensional coat of a perovskite compound is the basis for an efficient solar cell that might stand up to environmental wear and tear, unlike earlier perovskites. Engineers at Rice University raised the photovoltaic efficiency of 2D perovskites by up to 18%. Credit Jeff Fitlow/Rice University 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.