Researchers (IMAGE) Nanyang Technological University Caption (From left) NTU Prof Sum Tze Chien, Dr David Giovanni, Dr Lim Swee Sien and Mr Lim Jia Wei Melvin, used extremely fast lasers to observe how an energy barrier forms when perovskite is joined with a material. Credit NTU Singapore Usage Restrictions For this story 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.