Figure 3From: Electroluminescence of ordered ZnO nanorod array/p-GaN light-emitting diodes with graphene current spreading layerEL spectra of the ZnO nanorod array/p-GaN LEDs. With (a) graphene as the current spreading layer and (b) traditional structure, under various currents ranging from 2 to 10 mA. The insets show the schematic structures of the corresponding LEDs, respectively.Back to article page