Nanowire Heterojunction-GreenBlue (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption A cesium lead bromide (CsPbBr3) -- cesium lead chloride (CsPbCl3) heterojunction nanowire emitting green and blue light simultaneously under UV excitation. Credit Letian Dou/Berkeley Lab and Connor G. Bischak/UC Berkeley Usage Restrictions Editorial 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.