Micro-LEDs at low current densities to improve efficiency based on the considerations of carrier matching

In this study, a blue Micro-LED chip structure with 1-5 pairs of quantum wells was proposed, and the current-voltage (I-V) curve, electroluminescence (EL) intensity and internal quantum efficiency (IQE) were analyzed for samples with a chip size of 3.5um, respectively. The simulation results show that the IQE value is the highest when the number of pairs of quantum wells is one pair, and the IQE can reach 18% when the current density is 2A/cm2.