Organic Photovoltaic Polymer (IMAGE) University of Washington Caption A vial holds a solution that contains the UW-developed polymer "ink" that can be printed to make the solar cells. Credit Yeechi Chen/University of Washington Usage Restrictions News use only. 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.