Blue-light perovskite-based LED close up (IMAGE) Linköping University Caption Blue light-emitting diodes based on halide perovskites Credit Thor Balkhed Usage Restrictions Please use appropriate caption and credit. 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.