Quantum-emitting answer might lie in the solution
(PHYSorg.com Physics)

Tapping into the quantum properties of photons for optoelectronics requires highly efficient light sources. Lead trihalide perovskite nanocrystals exhibit a number of properties that make them promising candidates as light sources. Although coupling quantum emitters with nanophotonic cavities can significantly boost efficiency, this approach has not been explored with these nanocrystals.