Solar_cell_1 (IMAGE) University of Washington Caption The thin light-absorbing film is made of zinc oxide about 10 micrometers (10,000 nanometers) thick. This image was taken using a scanning electron microscope. Credit University of Washington 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.