Going cubic halves the efficiency droop in InGaAlN light-emitting diodes

https://techxplore.com/news/2022-04-cubic-halves-efficiency-droop-ingaaln.html

"switching from polar h-LEDs to c-LEDs quenches the efficiency droop from 45% to 22% (i.e. a 51% reduction) thanks to polarization elimination and effective mass reduction. It is further found that the quantum efficiency of c-LEDs is much immune to the Auger electron-hole asymmetry, the increase of Auger coefficient, and thus efficiency degradation mechanisms. Hence, cubic-phase InGaAlN green LEDs offer an appropriate solution to quench the efficiency droop"