Size-Independent Current Density-Voltage Characteristic of Micro-LEDs

Abstract

Various individual Micro-LEDs were designed and fabricated with size from 10 μm to 100 μm. The effects of Size-independent current density-voltage characteristic of Micro-LEDs were investigated. It is found size effect didn’t have obvious impact on the J-V characteristics (current density-voltage), because of the optimized current route of the current spreading layer. Meanwhile, the device leakage current was less than 10-11 A, while the contact resistance between p-GaN and contact metal is 5.9E-3 Ω•cm2. The forward voltage is 2.36V with the current density of 10 A/cm2, and external quantum efficiency is 13.6%.