Fig. 2From: Nearly Efficiency-Droop-Free AlGaN-Based Ultraviolet Light-Emitting Diodes with a Specifically Designed Superlattice p-Type Electron Blocking Layer for High Mg Doping Efficiencya Measured EL spectra at the current density of 10, 30, 50, and 70 A/cm2. b Measured optical power and EQE. c Calculated optical power and EQE for LEDs A and B, respectivelyBack to article page