Toward commercial viability (IMAGE) Princeton University, Engineering School Caption An array of perovskite solar cell designs sit under bright light at high temperatures during an accelerated aging and testing process developed by Princeton Engineering researchers. The new testing approach marks a major step toward the commercialization of advanced solar cells. Credit Photo by Bumper DeJesus Usage Restrictions please credit source 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.