Figure 1 (IMAGE) Tohoku University Caption An AI tool called GNNOpt can accurately predict optical spectra based solely on crystal structures and speed up the development of photovoltaic and quantum materials. Credit Nguyen Tuan Hung et al. Usage Restrictions Reporters may use these materials freely in news coverage with appropriate credit information. 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.