Heavy-metal-free blue LEDs with 4% external quantum efficiency

High color-purity deep blue emissive materials are highly desirable for applications in displays. In this publication, we utilized amination to obtain bright, blue emitting carbon dots with record high color-purity. We used theoretical modeling to show that amination reduces electron-phonon interactions leading to lower band-gap fluctuation and therefore a narrower emission linewidth.

Read more about this work here.