SOLAR 4 (IMAGE) Rice University Caption Rice University graduate student Siraj Sidhik sets up an experiment to expose a bilayer perovskite cell to artificial sunlight. Cells created in the Rice lab exposed to strong light for 2,000 hours degraded their efficiency by less than 1%. 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.