Perovskite 3 (IMAGE) Rice University Caption An electron microscope image shows a cross-section of the all-inorganic perovskite solar cell developed at Rice University. From top, the layers are a carbon electrode, perovskite, titanium oxide, fluorine-doped tin oxide and glass. The scale bar equals 500 nanometers. Credit Lou Group/Rice University Usage Restrictions None License Licensed 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.