(IMAGE) Technical University of Munich (TUM) Caption This is an electronmicroscopical image of the germanium-structure after removal of the polymer templates. The material forms an inverse opal-structure, which can be filled with suitable polymers to create hybrid solar cells. Credit Katia Rodewald / TUM 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.