Image 1 (IMAGE) National Research Council of Science & Technology Caption A transparent thin-film solar cell on a flexible substrate made by periodically mixing hydrogen with aluminum-doped zinc oxide material to realize color Credit Korea Institute of Materials Science (KIMS) Usage Restrictions The sources of photos and research results from KIMS must be specified. 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.