Surprisingly or not, isn't a very new idea https://en.wikipedia.org/wiki/Perovskite_light-emitting_diode https://en.wikipedia.org/wiki/Perovskite_light-emitting

Surprisingly or not, isn't a very new idea https://en.wikipedia.org/wiki/Perovskite_light-emitting_diode https://en.wikipedia.org/wiki/Perovskite_light-emitting_diod... Note that extending the lifetime is key to taking advantage of their lower base material cost. Lot of work needed there.